{"id":4066,"date":"2026-05-15T15:58:47","date_gmt":"2026-05-15T15:58:47","guid":{"rendered":"https:\/\/productionscrews.com\/?page_id=4066"},"modified":"2026-05-16T08:54:57","modified_gmt":"2026-05-16T08:54:57","slug":"din6921-hex-flange-bolt","status":"publish","type":"page","link":"https:\/\/productionscrews.com\/vi\/din6921-hex-flange-bolt\/","title":{"rendered":"\u1ed0c v\u00edt \u0111\u1ea7u flange h\u00ecnh l\u1ee5c gi\u00e1c DIN6921 | Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt \u0111\u1ea7y \u0111\u1ee7, k\u00edch th\u01b0\u1edbc &amp; h\u01b0\u1edbng d\u1eabn \u1ee9ng d\u1ee5ng"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"4066\" class=\"elementor elementor-4066\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-9rwj10p elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"9rwj10p\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-aotsc9v\" data-id=\"aotsc9v\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-8jq3g87 elementor-widget elementor-widget-heading\" data-id=\"8jq3g87\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Bu l\u00f4ng m\u1eb7t b\u00edch l\u1ee5c gi\u00e1c DIN6921 | Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt \u0111\u1ea7y \u0111\u1ee7, B\u1ea3ng k\u00edch th\u01b0\u1edbc &amp; H\u01b0\u1edbng d\u1eabn \u1ee9ng d\u1ee5ng<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-vxeslv6 elementor-widget elementor-widget-text-editor\" data-id=\"vxeslv6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p style=\"text-align:center;color:#CBD5E0;font-size:18px;max-width:720px;margin:16px auto 24px;\">DIN6921 l\u00e0 bu l\u00f4ng l\u1ee5c gi\u00e1c h\u1ec7 m\u00e9t v\u1edbi v\u00f2ng \u0111\u1ec7m m\u1eb7t b\u00edch t\u00edch h\u1ee3p d\u01b0\u1edbi \u0111\u1ea7u bu l\u00f4ng gi\u00fap ph\u00e2n ph\u1ed1i l\u1ef1c k\u1eb9p l\u00ean b\u1ec1 m\u1eb7t r\u1ed9ng h\u01a1n, c\u00f3 s\u1eb5n lo\u1ea1i m\u1eb7t tr\u01a1n v\u00e0 m\u1eb7t nh\u00e1m.<\/p><p style=\"text-align:center;color:#A0AEC0;font-size:15px;max-width:640px;margin:0 auto 32px;\">H\u01b0\u1edbng d\u1eabn n\u00e0y bao g\u1ed3m b\u1ea3ng k\u00edch th\u01b0\u1edbc \u0111\u1ea7y \u0111\u1ee7 t\u1eeb M5\u2013M20, d\u1eef li\u1ec7u \u0111\u1ed9 s\u00e2u m\u1eb7t b\u00edch, c\u00e1c c\u1ea5p v\u1eadt li\u1ec7u t\u1eeb 8.8 \u0111\u1ebfn A4-80, l\u1ef1a ch\u1ecdn gi\u1eefa m\u1eb7t nh\u00e1m v\u00e0 m\u1eb7t tr\u01a1n, c\u00f9ng so s\u00e1nh tr\u1ef1c ti\u1ebfp v\u1edbi DIN931 v\u00e0 DIN933.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-vi3xjpg elementor-align-center elementor-widget elementor-widget-button\" data-id=\"vi3xjpg\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"#dimensions\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Xem b\u1ea3ng k\u00edch th\u01b0\u1edbc \u2192<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8fkqyy3 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"8fkqyy3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/productionscrews.com\/vi\/\" target=\"_blank\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Xem s\u1ea3n ph\u1ea9m<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-i9tcb9z elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"i9tcb9z\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-60 elementor-top-column elementor-element elementor-element-mlu8n2r\" data-id=\"mlu8n2r\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-mi960cg elementor-widget elementor-widget-heading\" data-id=\"mi960cg\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Bu l\u00f4ng m\u1eb7t b\u00edch l\u1ee5c gi\u00e1c DIN6921 l\u00e0 g\u00ec?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-rjff75i elementor-widget elementor-widget-text-editor\" data-id=\"rjff75i\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t\n<p><strong>DIN6921 l\u00e0 bu l\u00f4ng l\u1ee5c gi\u00e1c h\u1ec7 m\u00e9t \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a b\u1edfi Vi\u1ec7n Ti\u00eau chu\u1ea9n \u0110\u1ee9c (DIN), c\u00f3 \u0111\u0129a m\u1eb7t b\u00edch tr\u00f2n m\u1edf r\u1ed9ng t\u00edch h\u1ee3p v\u00e0o m\u1eb7t d\u01b0\u1edbi c\u1ee7a \u0111\u1ea7u bu l\u00f4ng.<\/strong> M\u1eb7t b\u00edch ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t v\u00f2ng \u0111\u1ec7m t\u00edch h\u1ee3p \u2014 n\u00f3 ph\u00e2n ph\u1ed1i l\u1ef1c k\u1eb9p l\u00ean b\u1ec1 m\u1eb7t ch\u1ecbu l\u1ef1c r\u1ed9ng h\u01a1n nhi\u1ec1u so v\u1edbi \u0111\u1ea7u l\u1ee5c gi\u00e1c th\u00f4ng th\u01b0\u1eddng.<\/p>\n<p>Ti\u00eau chu\u1ea9n n\u00e0y bao g\u1ed3m hai bi\u1ebfn th\u1ec3 ri\u00eang bi\u1ec7t:<\/p>\n<ul>\n<li><strong>M\u1eb7t b\u00edch tr\u01a1n (b\u1ec1 m\u1eb7t ch\u1ecbu l\u1ef1c nh\u1eb5n):<\/strong> M\u1eb7t d\u01b0\u1edbi c\u1ee7a m\u1eb7t b\u00edch nh\u1eb5n. \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng khi b\u1ec1 m\u1eb7t chi ti\u1ebft c\u1ea7n gi\u1eef nguy\u00ean kh\u00f4ng b\u1ecb h\u01b0 h\u1ea1i \u2014 t\u1ea5m ph\u1ee7, b\u1ec1 m\u1eb7t s\u01a1n, h\u1ee3p kim m\u1ec1m v\u00e0 nh\u1ef1a \u0111\u1ec1u ph\u00f9 h\u1ee3p v\u1edbi lo\u1ea1i n\u00e0y.<\/li>\n<li><strong>M\u1eb7t b\u00edch nh\u00e1m (m\u1eb7t d\u01b0\u1edbi c\u00f3 r\u00e3nh\/kh\u00eda):<\/strong> R\u0103ng h\u01b0\u1edbng t\u00e2m \u0111\u01b0\u1ee3c \u00e9p v\u00e0o m\u1eb7t d\u01b0\u1edbi c\u1ee7a m\u1eb7t b\u00edch trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t. Khi bu l\u00f4ng \u0111\u01b0\u1ee3c si\u1ebft ch\u1eb7t, c\u00e1c r\u0103ng n\u00e0y \u0103n v\u00e0o b\u1ec1 m\u1eb7t chi ti\u1ebft v\u00e0 t\u1ea1o hi\u1ec7u \u1ee9ng t\u1ef1 kh\u00f3a c\u01a1 h\u1ecdc.<\/li>\n<\/ul>\n<p>Theo <a href=\"https:\/\/www.iso.org\/standard\/28024.html\" rel=\"noopener\" target=\"_blank\">DIN EN ISO 4759-1<\/a>, DIN6921 \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t theo <strong>C\u1ea5p s\u1ea3n ph\u1ea9m A<\/strong> (dung sai ch\u00ednh x\u00e1c). Ti\u00eau chu\u1ea9n n\u00e0y t\u01b0\u01a1ng th\u00edch v\u1ec1 k\u00edch th\u01b0\u1edbc v\u1edbi <strong>ISO 15071<\/strong> (kh\u00f4ng c\u00f3 m\u1eb7t nh\u00e1m) v\u00e0 <strong>ISO 15072<\/strong> (r\u0103ng c\u01b0a).<\/p>\n<p>C\u00e1ch \u0111\u01a1n gi\u1ea3n nh\u1ea5t \u0111\u1ec3 ngh\u0129 v\u1ec1 n\u00f3: <strong>DIN6921 = DIN933 + \u0111\u1ec7m ph\u1eb3ng t\u00edch h\u1ee3p + r\u0103ng c\u01b0a t\u1ef1 kh\u00f3a t\u00f9y ch\u1ecdn.<\/strong><\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-dq1q2hb elementor-widget elementor-widget-heading\" data-id=\"dq1q2hb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">DIN6921 so v\u1edbi DIN931 v\u00e0 DIN933 \u2014 Nh\u1eefng \u0111i\u1ec3m kh\u00e1c bi\u1ec7t ch\u00ednh<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-mjttm66 elementor-widget elementor-widget-text-editor\" data-id=\"mjttm66\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>DIN6921 kh\u00e1c bi\u1ec7t so v\u1edbi DIN931 v\u00e0 DIN933 ch\u1ee7 y\u1ebfu \u1edf \u0111\u0129a flange t\u00edch h\u1ee3p, gi\u00fap lo\u1ea1i b\u1ecf nhu c\u1ea7u s\u1eed d\u1ee5ng \u0111\u1ec7m ph\u1eb3ng ri\u00eang bi\u1ec7t v\u00e0 \u2014 trong bi\u1ebfn th\u1ec3 r\u0103ng c\u01b0a \u2014 thay th\u1ebf c\u1ea3 \u0111\u1ec7m kh\u00f3a.<\/strong><\/p><p>Ba ti\u00eau chu\u1ea9n n\u00e0y chia s\u1ebb c\u00f9ng h\u00ecnh d\u1ea1ng v\u00e0 v\u1eadt li\u1ec7u c\u1ee7a \u0111\u1ea7u ren hex. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 \u0111i\u1ec3m kh\u00e1c bi\u1ec7t:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9ug5ulv elementor-widget elementor-widget-html\" data-id=\"9ug5ulv\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t\n<table style=\"width:100%;border-collapse:collapse;font-size:14px;\">\n<thead style=\"background:#1B2A4A;color:#fff;\">\n<tr>\n<th style=\"padding:10px;text-align:left;border:1px solid #ddd;\">\u0110\u1eb7c \u0111i\u1ec3m<\/th>\n<th style=\"padding:10px;text-align:left;border:1px solid #ddd;\">DIN931 (Ren N\u1eeda)<\/th>\n<th style=\"padding:10px;text-align:left;border:1px solid #ddd;\">DIN933 (Ren To\u00e0n B\u1ed9)<\/th>\n<th style=\"padding:10px;text-align:left;border:1px solid #ddd;\">DIN6921 (\u1ed0c v\u00edt flange)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr><td style=\"padding:8px;border:1px solid #ddd;\">Flange t\u00edch h\u1ee3p<\/td><td style=\"padding:8px;border:1px solid #ddd;\">No<\/td><td style=\"padding:8px;border:1px solid #ddd;\">No<\/td><td style=\"padding:8px;border:1px solid #ddd;background:#f0f7ff;\"><strong>C\u00f3 \u2014 t\u00edch h\u1ee3p s\u1eb5n<\/strong><\/td><\/tr>\n<tr style=\"background:#f9f9f9;\"><td style=\"padding:8px;border:1px solid #ddd;\">B\u1ec1 m\u1eb7t ch\u1ecbu l\u1ef1c<\/td><td style=\"padding:8px;border:1px solid #ddd;\">Ch\u1ec9 d\u01b0\u1edbi \u0111\u1ea7u<\/td><td style=\"padding:8px;border:1px solid #ddd;\">Ch\u1ec9 d\u01b0\u1edbi \u0111\u1ea7u<\/td><td style=\"padding:8px;border:1px solid #ddd;background:#f0f7ff;\"><strong>Ph\u1ea7n flange m\u1edf r\u1ed9ng di\u1ec7n t\u00edch<\/strong><\/td><\/tr>\n<tr><td style=\"padding:8px;border:1px solid #ddd;\">Kh\u00f3a r\u0103ng c\u01b0a<\/td><td style=\"padding:8px;border:1px solid #ddd;\">No<\/td><td style=\"padding:8px;border:1px solid #ddd;\">No<\/td><td style=\"padding:8px;border:1px solid #ddd;background:#f0f7ff;\"><strong>C\u00f3 (bi\u1ebfn th\u1ec3 r\u0103ng c\u01b0a)<\/strong><\/td><\/tr>\n<tr style=\"background:#f9f9f9;\"><td style=\"padding:8px;border:1px solid #ddd;\">\u0110\u1ec7m ri\u00eang<\/td><td style=\"padding:8px;border:1px solid #ddd;\">Th\u01b0\u1eddng c\u00f3<\/td><td style=\"padding:8px;border:1px solid #ddd;\">Th\u01b0\u1eddng c\u00f3<\/td><td style=\"padding:8px;border:1px solid #ddd;background:#f0f7ff;\"><strong>Th\u01b0\u1eddng kh\u00f4ng<\/strong><\/td><\/tr>\n<tr><td style=\"padding:8px;border:1px solid #ddd;\">Ch\u1ed1ng rung l\u1eafc<\/td><td style=\"padding:8px;border:1px solid #ddd;\">Ti\u00eau chu\u1ea9n<\/td><td style=\"padding:8px;border:1px solid #ddd;\">Ti\u00eau chu\u1ea9n<\/td><td style=\"padding:8px;border:1px solid #ddd;background:#f0f7ff;\"><strong>Cao h\u01a1n (c\u00f3 r\u0103ng c\u01b0a)<\/strong><\/td><\/tr>\n<tr style=\"background:#f9f9f9;\"><td style=\"padding:8px;border:1px solid #ddd;\">\u1ee8ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh<\/td><td style=\"padding:8px;border:1px solid #ddd;\">C\u1ea5u tr\u00fac chung<\/td><td style=\"padding:8px;border:1px solid #ddd;\">Ren to\u00e0n b\u1ed9 chung<\/td><td style=\"padding:8px;border:1px solid #ddd;background:#f0f7ff;\"><strong>T\u1ef1 \u0111\u1ed9ng, t\u1ea5m m\u1ecfng, rung \u0111\u1ed9ng<\/strong><\/td><\/tr>\n<tr><td style=\"padding:8px;border:1px solid #ddd;\">T\u01b0\u01a1ng \u0111\u01b0\u01a1ng ISO<\/td><td style=\"padding:8px;border:1px solid #ddd;\">ISO 4014<\/td><td style=\"padding:8px;border:1px solid #ddd;\">ISO 4017<\/td><td style=\"padding:8px;border:1px solid #ddd;background:#f0f7ff;\"><strong>ISO 15071 \/ ISO 15072<\/strong><\/td><\/tr>\n<\/tbody>\n<\/table>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-k5usy3q elementor-widget elementor-widget-text-editor\" data-id=\"k5usy3q\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p style=\"margin-top:16px;\">Quy t\u1eafc quy\u1ebft \u0111\u1ecbnh th\u1ef1c t\u1ebf: n\u1ebfu l\u1eafp r\u00e1p c\u1ee7a b\u1ea1n li\u00ean quan \u0111\u1ebfn t\u1ea5m m\u1ecfng, rung \u0111\u1ed9ng ho\u1eb7c b\u1ea1n mu\u1ed1n gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng linh ki\u1ec7n, DIN6921 v\u01b0\u1ee3t tr\u1ed9i h\u01a1n c\u1ea3 DIN931 v\u00e0 DIN933. M\u1ed9t \u0111i\u1ec3m m\u00e0 b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt hi\u1ebfm khi \u0111\u1ec1 c\u1eadp: <strong>m\u1eb7t b\u00edch l\u00e0m t\u0103ng \u0111\u01b0\u1eddng k\u00ednh \u0111\u1ea7u hi\u1ec7u qu\u1ea3 th\u00eam 3\u20138mm<\/strong> \u2014 h\u00e3y ki\u1ec3m tra dc so v\u1edbi y\u00eau c\u1ea7u khe h\u1edf c\u1ee7a b\u1ea1n tr\u01b0\u1edbc khi thay th\u1ebf DIN6921 cho DIN933 trong thi\u1ebft k\u1ebf l\u1ea1i.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-40 elementor-top-column elementor-element elementor-element-fmvd1q4\" data-id=\"fmvd1q4\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-yavltok elementor-widget elementor-widget-image\" data-id=\"yavltok\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"896\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-vs-din931-comparison.png\" class=\"attachment-full size-full wp-image-4060\" alt=\"So s\u00e1nh bu l\u00f4ng m\u1eb7t b\u00edch l\u1ee5c gi\u00e1c DIN6921 v\u1edbi bu l\u00f4ng DIN931 DIN933 t\u00edch h\u1ee3p m\u1eb7t b\u00edch\" srcset=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-vs-din931-comparison.png 1200w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-vs-din931-comparison-360x269.png 360w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-vs-din931-comparison-723x540.png 723w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-vs-din931-comparison-150x112.png 150w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-vs-din931-comparison-768x573.png 768w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-vs-din931-comparison-16x12.png 16w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-r813hww elementor-widget elementor-widget-image\" data-id=\"r813hww\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1376\" height=\"768\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-hex-flange-bolt-featured-1.png\" class=\"attachment-full size-full wp-image-4058\" alt=\"C\u1eadn c\u1ea3nh c\u00e1c bu l\u00f4ng m\u1eb7t b\u00edch c\u01b0\u1eddng \u0111\u1ed9 cao v\u1edbi \u0111\u1ea7u l\u1ee5c gi\u00e1c v\u00e0 v\u00f2ng \u0111\u1ec7m t\u00edch h\u1ee3p, l\u00fd t\u01b0\u1edfng cho c\u00e1c \u1ee9ng d\u1ee5ng li\u00ean k\u1ebft c\u00f4ng nghi\u1ec7p.\" srcset=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-hex-flange-bolt-featured-1.png 1376w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-hex-flange-bolt-featured-1-360x201.png 360w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-hex-flange-bolt-featured-1-800x447.png 800w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-hex-flange-bolt-featured-1-150x84.png 150w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-hex-flange-bolt-featured-1-768x429.png 768w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-hex-flange-bolt-featured-1-18x10.png 18w\" sizes=\"(max-width: 1376px) 100vw, 1376px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-w71ii6r elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"w71ii6r\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-n8dyztr\" data-id=\"n8dyztr\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-g07zbdf elementor-widget elementor-widget-heading\" data-id=\"g07zbdf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">B\u1ea3ng k\u00edch th\u01b0\u1edbc \u0111\u1ea7y \u0111\u1ee7 DIN6921 (M5\u2013M20)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-i5hmsg6 elementor-widget elementor-widget-text-editor\" data-id=\"i5hmsg6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>DIN6921 \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t t\u1eeb M5 \u0111\u1ebfn M20, v\u1edbi \u0111\u01b0\u1eddng k\u00ednh m\u1eb7t b\u00edch t\u1eeb 11,8mm (M5) \u0111\u1ebfn 43mm (M20) v\u00e0 chi\u1ec1u cao \u0111\u1ea7u t\u1eeb 2,8mm \u0111\u1ebfn 9,5mm.<\/strong> Chi\u1ec1u d\u00e0i ren tu\u00e2n theo logic k\u00edch th\u01b0\u1edbc b gi\u1ed1ng nh\u01b0 c\u00e1c bu l\u00f4ng l\u1ee5c gi\u00e1c DIN kh\u00e1c, thay \u0111\u1ed5i theo chi\u1ec1u d\u00e0i danh \u0111\u1ecbnh.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-mk6zfg4 elementor-widget elementor-widget-image\" data-id=\"mk6zfg4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1376\" height=\"768\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-dimension-diagram.png\" class=\"attachment-full size-full wp-image-4059\" alt=\"S\u01a1 \u0111\u1ed3 k\u00edch th\u01b0\u1edbc bu l\u00f4ng m\u1eb7t b\u00edch DIN6921: dc, k, h, s, \u0111\u1ed9 s\u00e2u m\u1eb7t b\u00edch, chi\u1ec1u d\u00e0i danh \u0111\u1ecbnh\" srcset=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-dimension-diagram.png 1376w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-dimension-diagram-360x201.png 360w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-dimension-diagram-800x447.png 800w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-dimension-diagram-150x84.png 150w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-dimension-diagram-768x429.png 768w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-dimension-diagram-18x10.png 18w\" sizes=\"(max-width: 1376px) 100vw, 1376px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c37c39h elementor-widget elementor-widget-html\" data-id=\"c37c39h\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t\n<div style=\"overflow-x:auto;\">\n<table id=\"dimensions\" style=\"width:100%;border-collapse:collapse;font-size:13px;min-width:700px;\">\n<thead style=\"background:#1B2A4A;color:#fff;\">\n<tr>\n<th style=\"padding:10px;text-align:left;border:1px solid #ddd;\">Ren d<\/th>\n<th style=\"padding:10px;border:1px solid #ddd;\">B\u01b0\u1edbc ren P (mm)<\/th>\n<th style=\"padding:10px;border:1px solid #ddd;\">Chi\u1ec1u cao \u0111\u1ea7u k (mm)<\/th>\n<th style=\"padding:10px;border:1px solid #ddd;\">\u0110\u01b0\u1eddng k\u00ednh m\u1eb7t b\u00edch dc (mm)<\/th>\n<th style=\"padding:10px;border:1px solid #ddd;\">Chi\u1ec1u r\u1ed9ng m\u1eb7t ph\u1eb3ng s (mm)<\/th>\n<th style=\"padding:10px;border:1px solid #ddd;\">Chi\u1ec1u r\u1ed9ng g\u00f3c e (mm)<\/th>\n<th style=\"padding:10px;border:1px solid #ddd;\">Chi\u1ec1u d\u00e0i ren b \u2264125<\/th>\n<th style=\"padding:10px;border:1px solid #ddd;\">Chi\u1ec1u d\u00e0i ren b 125\u2013200<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr><td style=\"padding:8px;border:1px solid #ddd;\"><strong>M5<\/strong><\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">0.80<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">2.8<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">11.80<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">8<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">8.79<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">16<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">\u2014<\/td><\/tr>\n<tr style=\"background:#f9f9f9;\"><td style=\"padding:8px;border:1px solid #ddd;\"><strong>M6<\/strong><\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">1.00<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">3.4<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">14.20<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">10<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">11.05<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">18<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">\u2014<\/td><\/tr>\n<tr><td style=\"padding:8px;border:1px solid #ddd;\"><strong>M8<\/strong><\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">1.25<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">4.2<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">18.00<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">13<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">14.38<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">22<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">\u2014<\/td><\/tr>\n<tr style=\"background:#f9f9f9;\"><td style=\"padding:8px;border:1px solid #ddd;\"><strong>M10<\/strong><\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">1.50<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">5.7<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">22.30<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">15<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">16.64<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">26<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">32<\/td><\/tr>\n<tr><td style=\"padding:8px;border:1px solid #ddd;\"><strong>M12<\/strong><\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">1.75<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">6.1<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">26.60<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">16<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">17.62<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">30<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">36<\/td><\/tr>\n<tr style=\"background:#f9f9f9;\"><td style=\"padding:8px;border:1px solid #ddd;\">(M14)<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">2.00<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">8.0<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">31.00<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">18<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">20.03<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">34<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">40<\/td><\/tr>\n<tr><td style=\"padding:8px;border:1px solid #ddd;\"><strong>M16<\/strong><\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">2.00<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">8.7<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">35.00<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">21<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">23.15<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">38<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">44<\/td><\/tr>\n<tr style=\"background:#f9f9f9;\"><td style=\"padding:8px;border:1px solid #ddd;\">(M18)<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">2.50<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">9.0<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">39.00<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">24<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">26.75<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">42<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">48<\/td><\/tr>\n<tr><td style=\"padding:8px;border:1px solid #ddd;\"><strong>M20<\/strong><\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">2.50<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">9.5<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">43.00<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">27<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">29.56<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">46<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">52<\/td><\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p style=\"font-size:13px;color:#666;margin-top:8px;\">C\u00e1c k\u00edch th\u01b0\u1edbc trong ngo\u1eb7c (M14, M18) l\u00e0 kh\u00f4ng \u01b0u ti\u00ean. dc = \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i m\u1eb7t b\u00edch. Phi\u00ean b\u1ea3n ren nh\u1ecf c\u00f3 s\u1eb5n cho M8\u00d71, M10\u00d71.25, M12\u00d71.5, M16\u00d71.5.<\/p>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-mlqc2fo elementor-widget elementor-widget-html\" data-id=\"mlqc2fo\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t\n<h3 style=\"margin-top:32px;\">D\u1eef li\u1ec7u \u0110\u1ed9 s\u00e2u m\u1eb7t b\u00edch v\u00e0 B\u1ec1 m\u1eb7t ch\u1ecbu l\u1ef1c DIN6921<\/h3>\n<p><strong>\u0110\u1ed9 s\u00e2u m\u1eb7t b\u00edch h dao \u0111\u1ed9ng t\u1eeb 3,0mm (M5) \u0111\u1ebfn 8,5mm (M20).<\/strong> D\u1eef li\u1ec7u n\u00e0y r\u1ea5t quan tr\u1ecdng khi t\u00ednh t\u1ed5ng chi\u1ec1u cao l\u1eafp \u0111\u1eb7t (k + h) v\u00e0 khi x\u00e1c \u0111\u1ecbnh \u0111\u1ed9 s\u00e2u kho\u00e9t l\u1ed7 trong c\u00e1c b\u1ed9 ph\u1eadn b\u1eb1ng nh\u00f4m ho\u1eb7c v\u1eadt li\u1ec7u t\u1ed5ng h\u1ee3p.<\/p>\n<div style=\"overflow-x:auto;\">\n<table style=\"width:100%;border-collapse:collapse;font-size:13px;\">\n<thead style=\"background:#2563EB;color:#fff;\">\n<tr>\n<th style=\"padding:10px;text-align:left;border:1px solid #ddd;\">Ren d<\/th>\n<th style=\"padding:10px;border:1px solid #ddd;\">\u0110\u1ed9 s\u00e2u m\u1eb7t b\u00edch h (mm)<\/th>\n<th style=\"padding:10px;border:1px solid #ddd;\">Chi\u1ec1u r\u1ed9ng b\u1ec1 m\u1eb7t ch\u1ecbu l\u1ef1c m (mm)<\/th>\n<th style=\"padding:10px;border:1px solid #ddd;\">M\u1eb7t b\u00edch t\u1ed1i thi\u1ec3u m' (mm)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr><td style=\"padding:8px;border:1px solid #ddd;\"><strong>M5<\/strong><\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">T\u1ed1i \u0111a 3,0<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">T\u1ed1i thi\u1ec3u 1,7<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">T\u1ed1i thi\u1ec3u 0,7<\/td><\/tr>\n<tr style=\"background:#f9f9f9;\"><td style=\"padding:8px;border:1px solid #ddd;\"><strong>M6<\/strong><\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">T\u1ed1i \u0111a 3,5<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">T\u1ed1i thi\u1ec3u 2,2<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">T\u1ed1i thi\u1ec3u 1,0<\/td><\/tr>\n<tr><td style=\"padding:8px;border:1px solid #ddd;\"><strong>M8<\/strong><\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">T\u1ed1i \u0111a 4,5<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">T\u1ed1i thi\u1ec3u 2,8<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">T\u1ed1i thi\u1ec3u 1,5<\/td><\/tr>\n<tr style=\"background:#f9f9f9;\"><td style=\"padding:8px;border:1px solid #ddd;\"><strong>M10<\/strong><\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">T\u1ed1i \u0111a 5,0<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">T\u1ed1i thi\u1ec3u 3,3<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">T\u1ed1i thi\u1ec3u 1,8<\/td><\/tr>\n<tr><td style=\"padding:8px;border:1px solid #ddd;\"><strong>M12<\/strong><\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">T\u1ed1i \u0111a 6.0<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">T\u1ed1i thi\u1ec3u 4.2<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">T\u1ed1i thi\u1ec3u 2,2<\/td><\/tr>\n<tr style=\"background:#f9f9f9;\"><td style=\"padding:8px;border:1px solid #ddd;\"><strong>M16<\/strong><\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">T\u1ed1i \u0111a 7.5<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">T\u1ed1i thi\u1ec3u 5.0<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">T\u1ed1i thi\u1ec3u 2,8<\/td><\/tr>\n<tr><td style=\"padding:8px;border:1px solid #ddd;\"><strong>M20<\/strong><\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">T\u1ed1i \u0111a 8.5<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">T\u1ed1i thi\u1ec3u 5.8<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\">T\u1ed1i thi\u1ec3u 3.2<\/td><\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-g97bd0h elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"g97bd0h\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-l7b3ols\" data-id=\"l7b3ols\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-worwn86 elementor-widget elementor-widget-heading\" data-id=\"worwn86\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">V\u1eadt li\u1ec7u v\u00e0 c\u1ea5p \u0111\u1ed9 b\u1ec1n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-od6r07y elementor-widget elementor-widget-text-editor\" data-id=\"od6r07y\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t\n<p><strong>DIN6921 c\u00f3 s\u1eb5n c\u00e1c c\u1ea5p th\u00e9p cacbon t\u1eeb 8.8 \u0111\u1ebfn 12.9 v\u00e0 c\u00e1c c\u1ea5p th\u00e9p kh\u00f4ng g\u1ec9 t\u1eeb A2-70 \u0111\u1ebfn A4-80, v\u1edbi \u0111\u1ed9 b\u1ec1n k\u00e9o t\u1eeb 800 MPa \u0111\u1ebfn 1220 MPa.<\/strong><\/p>\n<p>Theo <a href=\"https:\/\/www.iso.org\/standard\/64986.html\" rel=\"noopener\" target=\"_blank\">ISO 898-1, ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf v\u1ec1 t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a bulong<\/a>, k\u00fd hi\u1ec7u c\u1ea5p \u0111\u1ed9 th\u1ec3 hi\u1ec7n tr\u1ef1c ti\u1ebfp \u0111\u1ed9 b\u1ec1n k\u00e9o v\u00e0 gi\u1edbi h\u1ea1n ch\u1ea3y:<\/p>\n<p><strong>Th\u00e9p cacbon:<\/strong><\/p>\n<ul>\n<li><strong>C\u1ea5p 8.8:<\/strong> \u0110\u1ed9 b\u1ec1n k\u00e9o 800 MPa, gi\u1edbi h\u1ea1n ch\u1ea3y 640 MPa. C\u1ea5p \u0111\u1ed9 ph\u1ed5 bi\u1ebfn cho ng\u00e0nh \u00f4 t\u00f4 v\u00e0 m\u00e1y m\u00f3c n\u00f3i chung.<\/li>\n<li><strong>C\u1ea5p 10.9:<\/strong> \u0110\u1ed9 b\u1ec1n k\u00e9o 1040 MPa, gi\u1edbi h\u1ea1n ch\u1ea3y 940 MPa. Th\u00e9p h\u1ee3p kim. D\u00f9ng cho c\u00e1c m\u1ed1i n\u1ed1i \u00f4 t\u00f4 y\u00eau c\u1ea7u an to\u00e0n cao.<\/li>\n<li><strong>C\u1ea5p 12.9:<\/strong> \u0110\u1ed9 b\u1ec1n k\u00e9o 1220 MPa. D\u00f9ng trong \u0111ua xe, ch\u1ecbu m\u1ecfi cao, \u1ee9ng d\u1ee5ng si\u1ebft l\u1ef1c ch\u00ednh x\u00e1c.<\/li>\n<\/ul>\n<p><strong>Th\u00e9p kh\u00f4ng g\u1ec9:<\/strong><\/p>\n<ul>\n<li><strong>A2-70 (th\u00e9p kh\u00f4ng g\u1ec9 304):<\/strong> 700 MPa. Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n t\u1ed5ng th\u1ec3, thi\u1ebft b\u1ecb th\u1ef1c ph\u1ea9m, m\u00f4i tr\u01b0\u1eddng trong nh\u00e0.<\/li>\n<li><strong>A4-70 (Th\u00e9p kh\u00f4ng g\u1ec9 316):<\/strong> 700 MPa. Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n clo v\u00e0 m\u00f4i tr\u01b0\u1eddng bi\u1ec3n v\u01b0\u1ee3t tr\u1ed9i nh\u1edd th\u00e0nh ph\u1ea7n molypden.<\/li>\n<li><strong>A4-80 (Th\u00e9p kh\u00f4ng g\u1ec9 316, c\u01b0\u1eddng \u0111\u1ed9 cao):<\/strong> 800 MPa. D\u1ea7u kh\u00ed, ngo\u00e0i kh\u01a1i, d\u01b0\u1ee3c ph\u1ea9m \u2014 c\u01b0\u1eddng \u0111\u1ed9 + ch\u1ed1ng \u0103n m\u00f2n.<\/li>\n<\/ul>\n<p><strong>C\u00e1c lo\u1ea1i ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t:<\/strong> M\u1ed9c \/ M\u1ea1 k\u1ebdm tr\u1eafng \/ M\u1ea1 k\u1ebdm v\u00e0ng dichromate \/ M\u1ea1 k\u1ebdm nh\u00fang n\u00f3ng \/ Dacromet \/ Oxit \u0111en<\/p>\n<p><em>L\u01b0u \u00fd: Bi\u1ebfn th\u1ec3 DIN6921 HDG c\u00f3 r\u0103ng c\u01b0a kh\u00f4ng ph\u1ed5 bi\u1ebfn \u2014 l\u1edbp k\u1ebdm d\u00e0y (85\u2013100\u00b5m theo <a href=\"https:\/\/www.iso.org\/standard\/61758.html\" rel=\"noopener\" target=\"_blank\">ISO 1461<\/a>) l\u1ea5p \u0111\u1ea7y c\u00e1c r\u0103ng c\u01b0a. N\u00ean d\u00f9ng Dacromet (5\u201310\u00b5m) \u0111\u1ec3 gi\u1eef nguy\u00ean h\u00ecnh d\u1ea1ng r\u0103ng.<\/em><\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-xeehtxl elementor-widget elementor-widget-html\" data-id=\"xeehtxl\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t\n<table style=\"width:100%;border-collapse:collapse;font-size:13px;\">\n<thead style=\"background:#1B2A4A;color:#fff;\">\n<tr>\n<th style=\"padding:10px;text-align:left;border:1px solid #ddd;\">V\u1eadt li\u1ec7u<\/th>\n<th style=\"padding:10px;border:1px solid #ddd;\">C\u1ea5p \u0111\u1ed9<\/th>\n<th style=\"padding:10px;border:1px solid #ddd;\">\u1ee8ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr><td style=\"padding:8px;border:1px solid #ddd;\">Th\u00e9p carbon<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\"><strong>8.8<\/strong><\/td><td style=\"padding:8px;border:1px solid #ddd;\">\u00d4 t\u00f4 n\u00f3i chung, m\u00e1y m\u00f3c, t\u1ee7 \u0111i\u1ec7n<\/td><\/tr>\n<tr style=\"background:#f9f9f9;\"><td style=\"padding:8px;border:1px solid #ddd;\">Th\u00e9p carbon<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\"><strong>10.9<\/strong><\/td><td style=\"padding:8px;border:1px solid #ddd;\">K\u1ebft c\u1ea5u c\u01b0\u1eddng \u0111\u1ed9 cao, ho\u00e0n thi\u1ec7n ti\u00eau chu\u1ea9n m\u1ea1 k\u1ebdm v\u00e0ng<\/td><\/tr>\n<tr><td style=\"padding:8px;border:1px solid #ddd;\">Th\u00e9p carbon<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\"><strong>12.9<\/strong><\/td><td style=\"padding:8px;border:1px solid #ddd;\">M\u1ed1i n\u1ed1i ch\u1ecbu t\u1ea3i tr\u1ecdng quan tr\u1ecdng, \u0111ua xe, nh\u1ea1y c\u1ea3m v\u1edbi m\u1ecfi<\/td><\/tr>\n<tr style=\"background:#f9f9f9;\"><td style=\"padding:8px;border:1px solid #ddd;\">Kh\u00f4ng g\u1ec9<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\"><strong>A2-70<\/strong><\/td><td style=\"padding:8px;border:1px solid #ddd;\">Th\u1ef1c ph\u1ea9m, c\u00f4ng nghi\u1ec7p nh\u1eb9, m\u00f4i tr\u01b0\u1eddng trong nh\u00e0<\/td><\/tr>\n<tr><td style=\"padding:8px;border:1px solid #ddd;\">Kh\u00f4ng g\u1ec9<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\"><strong>A4-70<\/strong><\/td><td style=\"padding:8px;border:1px solid #ddd;\">Bi\u1ec3n, h\u00f3a ch\u1ea5t, ngo\u00e0i tr\u1eddi, ven bi\u1ec3n<\/td><\/tr>\n<tr style=\"background:#f9f9f9;\"><td style=\"padding:8px;border:1px solid #ddd;\">Kh\u00f4ng g\u1ec9<\/td><td style=\"padding:8px;border:1px solid #ddd;text-align:center;\"><strong>A4-80<\/strong><\/td><td style=\"padding:8px;border:1px solid #ddd;\">M\u00f4i tr\u01b0\u1eddng m\u00f4-men xo\u1eafn cao, ch\u1ed1ng \u0103n m\u00f2n, ngo\u00e0i kh\u01a1i<\/td><\/tr>\n<\/tbody>\n<\/table>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-1s9e13r\" data-id=\"1s9e13r\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-t2m8q6r elementor-widget elementor-widget-heading\" data-id=\"t2m8q6r\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">\u1ee8ng d\u1ee5ng ch\u00ednh c\u1ee7a DIN6921<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5gj020e elementor-widget elementor-widget-text-editor\" data-id=\"5gj020e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t\n<p><strong>DIN6921 \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh \u1edf b\u1ea5t c\u1ee9 n\u01a1i n\u00e0o c\u1ea7n b\u1ec1 m\u1eb7t ch\u1ecbu l\u1ef1c r\u1ed9ng h\u01a1n, gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng linh ki\u1ec7n ho\u1eb7c ch\u1ed1ng rung \u2014 ch\u1ee7 y\u1ebfu trong s\u1ea3n xu\u1ea5t \u00f4 t\u00f4, kim lo\u1ea1i t\u1ea5m v\u00e0 m\u00e1y m\u00f3c rung.<\/strong><\/p>\n<ul>\n<li><strong>L\u1eafp r\u00e1p \u0111\u1ed9ng c\u01a1 &amp; khung g\u1ea7m \u00f4 t\u00f4:<\/strong> C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t \u00f4 t\u00f4 l\u1edbn t\u1ea1i Vi\u1ec7t Nam ch\u1ec9 \u0111\u1ecbnh DIN6921 cho n\u1eafp \u0111\u1ed9ng c\u01a1, khung ph\u1ee5 treo v\u00e0 gi\u00e1 \u0111\u1ee1 \u1ed1ng x\u1ea3 \u2014 m\u1eb7t b\u00edch lo\u1ea1i b\u1ecf v\u00f2ng \u0111\u1ec7m ri\u00eang bi\u1ec7t v\u1ed1n d\u1ec5 b\u1ecb l\u1ecfng khi l\u1eafp r\u00e1p b\u1eb1ng robot.<\/li>\n<li><strong>Li\u00ean k\u1ebft t\u1ea5m kim lo\u1ea1i v\u00e0 b\u1ea3ng m\u1ecfng:<\/strong> M\u1eb7t b\u00edch m\u1edf r\u1ed9ng ng\u0103n ch\u1eb7n vi\u1ec7c b\u1ecb k\u00e9o xuy\u00ean qua c\u00e1c b\u1ea3ng m\u1ecfng h\u01a1n 2\u20133mm, n\u01a1i \u0111\u1ea7u l\u1ee5c gi\u00e1c ti\u00eau chu\u1ea9n c\u00f3 th\u1ec3 l\u00e0m l\u00f5m ho\u1eb7c \u0111\u00e2m th\u1ee7ng d\u01b0\u1edbi t\u1ea3i tr\u1ecdng.<\/li>\n<li><strong>M\u00e1y m\u00f3c v\u00e0 thi\u1ebft b\u1ecb rung:<\/strong> Bi\u1ebfn th\u1ec3 c\u00f3 r\u0103ng c\u01b0a cung c\u1ea5p kh\u1ea3 n\u0103ng t\u1ef1 kh\u00f3a ch\u1ed1ng l\u1ecfng do rung m\u00e0 kh\u00f4ng c\u1ea7n th\u00eam v\u00f2ng kh\u00f3a, \u0111ai \u1ed1c Nyloc ho\u1eb7c keo kh\u00f3a ren.<\/li>\n<li><strong>L\u1eafp \u0111\u1eb7t linh ki\u1ec7n nh\u1ef1a:<\/strong> M\u1eb7t b\u00edch ph\u00e2n ph\u1ed1i t\u1ea3i k\u1eb9p \u0111\u1ec3 ng\u0103n h\u01b0 h\u1ecfng do nghi\u1ec1n trong v\u1ecf nh\u1ef1a nhi\u1ec7t. Ch\u1ec9 s\u1eed d\u1ee5ng m\u1eb7t b\u00edch tr\u01a1n \u2014 r\u0103ng c\u01b0a s\u1ebd l\u00e0m n\u1ee9t b\u1ec1 m\u1eb7t nh\u1ef1a.<\/li>\n<li><strong>L\u1eafp r\u00e1p \u1ed1ng d\u1eabn HVAC v\u00e0 khung:<\/strong> L\u1eafp r\u00e1p t\u1ea5m kim lo\u1ea1i s\u1ed1 l\u01b0\u1ee3ng l\u1edbn n\u01a1i hi\u1ec7u qu\u1ea3 c\u1ee7a m\u1ed9t ch\u1ed1t gi\u1ea3m chi ph\u00ed lao \u0111\u1ed9ng tr\u00ean m\u1ed7i m\u1ed1i n\u1ed1i.<\/li>\n<li><strong>Thi\u1ebft b\u1ecb n\u00f4ng nghi\u1ec7p &amp; xe ngo\u00e0i \u0111\u01b0\u1eddng:<\/strong> M\u00f4i tr\u01b0\u1eddng rung m\u1ea1nh v\u1edbi b\u1ec1 m\u1eb7t b\u1ecb b\u1ea9n b\u1edfi b\u1ee5i h\u01b0\u1edfng l\u1ee3i t\u1eeb m\u1eb7t b\u00edch r\u0103ng c\u01b0a t\u1ef1 kh\u00f3a.<\/li>\n<li><strong>L\u1eafp r\u00e1p t\u1ee7 \u0111i\u1ec7n &amp; v\u1ecf b\u1ea3o v\u1ec7:<\/strong> M5 v\u00e0 M6 DIN6921 l\u00e0 ti\u00eau chu\u1ea9n cho l\u1eafp \u0111\u1eb7t thanh DIN v\u00e0 b\u1ea3ng \u2014 m\u1eb7t b\u00edch cung c\u1ea5p di\u1ec7n t\u00edch ti\u1ebfp x\u00fac ti\u1ebfp \u0111\u1ea5t t\u1ed1t.<\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-xc2ztme elementor-widget elementor-widget-image\" data-id=\"xc2ztme\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"896\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-application-automotive.png\" class=\"attachment-full size-full wp-image-4062\" alt=\"\u1ee8ng d\u1ee5ng l\u1eafp r\u00e1p bu l\u00f4ng m\u1eb7t b\u00edch DIN6921 cho \u0111\u1ed9ng c\u01a1 \u00f4 t\u00f4, khung g\u1ea7m\" srcset=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-application-automotive.png 1200w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-application-automotive-360x269.png 360w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-application-automotive-723x540.png 723w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-application-automotive-150x112.png 150w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-application-automotive-768x573.png 768w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-application-automotive-16x12.png 16w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-k96w5aw elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"k96w5aw\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-60 elementor-top-column elementor-element elementor-element-jovvnfp\" data-id=\"jovvnfp\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-xvdw21j elementor-widget elementor-widget-heading\" data-id=\"xvdw21j\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">DIN6921 r\u0103ng c\u01b0a so v\u1edbi kh\u00f4ng r\u0103ng c\u01b0a \u2014 N\u00ean ch\u1ecdn lo\u1ea1i n\u00e0o?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2aj27xy elementor-widget elementor-widget-text-editor\" data-id=\"2aj27xy\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t\n<p><strong>Ch\u1ecdn DIN6921 r\u0103ng c\u01b0a cho c\u00e1c c\u1ee5m l\u1eafp r\u00e1p rung ho\u1eb7c t\u1ea3i \u0111\u1ed9ng tr\u00ean b\u1ec1 m\u1eb7t th\u00e9p c\u1ee9ng; ch\u1ecdn m\u1eb7t b\u00edch tr\u01a1n cho v\u1eadt li\u1ec7u m\u1ec1m, b\u1ec1 m\u1eb7t ph\u1ee7 ho\u1eb7c c\u00e1c m\u1ed1i n\u1ed1i s\u1ebd th\u00e1o l\u1eafp nhi\u1ec1u l\u1ea7n.<\/strong><\/p>\n<p>\u0110\u00e2y l\u00e0 quy\u1ebft \u0111\u1ecbnh m\u00e0 h\u1ea7u h\u1ebft ng\u01b0\u1eddi mua m\u1eafc sai l\u1ea7m \u2014 h\u1ecd m\u1eb7c \u0111\u1ecbnh ch\u1ecdn lo\u1ea1i r\u0103ng c\u01b0a v\u00ec ngh\u0129 \u201cnghe c\u00f3 v\u1ebb t\u1ed1t h\u01a1n\u201d, r\u1ed3i ph\u00e1t hi\u1ec7n n\u00f3 l\u00e0m bong l\u1edbp s\u01a1n ho\u1eb7c h\u1ecfng ch\u00e2n nh\u00f4m.<\/p>\n<p><strong>Quy t\u1eafc quy\u1ebft \u0111\u1ecbnh:<\/strong><\/p>\n<ul>\n<li><strong>B\u1ec1 m\u1eb7t s\u01a1n ho\u1eb7c ph\u1ee7 \u2192 M\u1eb7t b\u00edch tr\u01a1n.<\/strong> R\u0103ng c\u01b0a s\u1ebd l\u00e0m bong l\u1edbp ph\u1ee7 v\u00e0 t\u1ea1o \u0111i\u1ec3m kh\u1edfi \u0111\u1ea7u \u0103n m\u00f2n. N\u1ebfu c\u1ea7n ch\u1ed1ng rung, h\u00e3y d\u00f9ng m\u1eb7t b\u00edch tr\u01a1n + Loctite 243.<\/li>\n<li><strong>T\u1ea3i rung \/ \u0111\u1ed9ng tr\u00ean th\u00e9p tr\u1ea7n \u2192 M\u1eb7t b\u00edch r\u0103ng c\u01b0a.<\/strong> Ch\u1ed1t m\u1eb7t b\u00edch r\u0103ng c\u01b0a cho th\u1ea5y kh\u1ea3 n\u0103ng ch\u1ed1ng t\u1ef1 l\u1ecfng t\u1ed1t h\u01a1n 3\u20135 l\u1ea7n d\u01b0\u1edbi rung ngang so v\u1edbi bu l\u00f4ng \u0111\u1ea7u tr\u01a1n v\u1edbi v\u00f2ng \u0111\u1ec7m ph\u1eb3ng.<\/li>\n<li><strong>V\u1ecf nh\u00f4m ho\u1eb7c nh\u1ef1a \u2192 Ch\u1ec9 s\u1eed d\u1ee5ng m\u1eb7t b\u00edch tr\u01a1n.<\/strong> R\u0103ng c\u01b0a s\u1ebd l\u00e0m l\u00f5m ho\u1eb7c n\u1ee9t v\u1eadt li\u1ec7u m\u1ec1m. \u0110\u1ed1i v\u1edbi nh\u00f4m, s\u1eed d\u1ee5ng inox A2 ho\u1eb7c A4 DIN6921 \u0111\u1ec3 tr\u00e1nh \u0103n m\u00f2n \u0111i\u1ec7n h\u00f3a.<\/li>\n<li><strong>C\u00e1c m\u1ed1i gh\u00e9p t\u00e1i s\u1eed d\u1ee5ng nhi\u1ec1u l\u1ea7n (\u0111\u1ed3 g\u00e1, khu\u00f4n) \u2192 M\u1eb7t b\u00edch tr\u01a1n.<\/strong> R\u0103ng c\u01b0a g\u00e2y h\u01b0 h\u1ea1i b\u1ec1 m\u1eb7t t\u00edch l\u0169y, l\u00e0m gi\u1ea3m \u0111\u1ed9 b\u1ec1n m\u1ed1i gh\u00e9p sau nhi\u1ec1u l\u1ea7n th\u00e1o l\u1eafp.<\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bxwjewv elementor-widget elementor-widget-html\" data-id=\"bxwjewv\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t\n<table style=\"width:100%;border-collapse:collapse;font-size:13px;\">\n<thead style=\"background:#1B2A4A;color:#fff;\">\n<tr>\n<th style=\"padding:10px;text-align:left;border:1px solid #ddd;\">Thu\u1ed9c t\u00ednh<\/th>\n<th style=\"padding:10px;border:1px solid #ddd;\">Kh\u00f4ng r\u0103ng c\u01b0a (M\u1eb7t b\u00edch tr\u01a1n)<\/th>\n<th style=\"padding:10px;border:1px solid #ddd;\">C\u00f3 r\u0103ng c\u01b0a (M\u1eb7t b\u00edch kh\u00eda)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr><td style=\"padding:8px;border:1px solid #ddd;\">Ch\u1ee9c n\u0103ng kh\u00f3a<\/td><td style=\"padding:8px;border:1px solid #ddd;\">Kh\u00f4ng c\u00f3 \u2014 c\u1ea7n th\u00eam v\u00f2ng \u0111\u1ec7m kh\u00f3a ri\u00eang<\/td><td style=\"padding:8px;border:1px solid #ddd;background:#f0fff4;\"><strong>T\u00edch h\u1ee3p \u2014 r\u0103ng c\u01b0a \u0103n v\u00e0o chi ti\u1ebft<\/strong><\/td><\/tr>\n<tr style=\"background:#f9f9f9;\"><td style=\"padding:8px;border:1px solid #ddd;\">C\u00f3 th\u1ec3 t\u00e1i s\u1eed d\u1ee5ng<\/td><td style=\"padding:8px;border:1px solid #ddd;background:#f0fff4;\"><strong>Cao<\/strong><\/td><td style=\"padding:8px;border:1px solid #ddd;\">Gi\u1ea3m \u2014 r\u0103ng c\u01b0a l\u00e0m h\u1ecfng b\u1ec1 m\u1eb7t m\u1ec1m<\/td><\/tr>\n<tr><td style=\"padding:8px;border:1px solid #ddd;\">T\u01b0\u01a1ng th\u00edch b\u1ec1 m\u1eb7t<\/td><td style=\"padding:8px;border:1px solid #ddd;background:#f0fff4;\"><strong>T\u1ea5t c\u1ea3 v\u1eadt li\u1ec7u k\u1ec3 c\u1ea3 ph\u1ee7\/l\u1edbp s\u01a1n<\/strong><\/td><td style=\"padding:8px;border:1px solid #ddd;\">Ch\u1ec9 th\u00e9p v\u00e0 v\u1eadt li\u1ec7u c\u1ee9ng<\/td><\/tr>\n<tr style=\"background:#f9f9f9;\"><td style=\"padding:8px;border:1px solid #ddd;\">Ch\u1ed1ng rung l\u1eafc<\/td><td style=\"padding:8px;border:1px solid #ddd;\">Ti\u00eau chu\u1ea9n<\/td><td style=\"padding:8px;border:1px solid #ddd;background:#f0fff4;\"><strong>Cao h\u01a1n \u0111\u00e1ng k\u1ec3<\/strong><\/td><\/tr>\n<tr><td style=\"padding:8px;border:1px solid #ddd;\">S\u1eed d\u1ee5ng khi<\/td><td style=\"padding:8px;border:1px solid #ddd;\">K\u1eb9p ch\u00ednh x\u00e1c, m\u1ed1i gh\u00e9p t\u00e1i s\u1eed d\u1ee5ng, v\u1eadt li\u1ec7u n\u1ec1n m\u1ec1m<\/td><td style=\"padding:8px;border:1px solid #ddd;\">L\u1eafp r\u00e1p rung, l\u1eafp \u0111\u1eb7t m\u1ed9t l\u1ea7n tr\u00ean th\u00e9p tr\u1ea7n<\/td><\/tr>\n<\/tbody>\n<\/table>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-40 elementor-top-column elementor-element elementor-element-gl0y0nj\" data-id=\"gl0y0nj\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6egwgu8 elementor-widget elementor-widget-image\" data-id=\"6egwgu8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"896\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-serrated-vs-plain-flange.png\" class=\"attachment-full size-full wp-image-4061\" alt=\"So s\u00e1nh bu l\u00f4ng m\u1eb7t b\u00edch DIN6921 c\u00f3 r\u0103ng c\u01b0a v\u00e0 m\u1eb7t b\u00edch tr\u01a1n, m\u1eb7t d\u01b0\u1edbi c\u00f3 r\u0103ng kh\u00f3a\" srcset=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-serrated-vs-plain-flange.png 1200w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-serrated-vs-plain-flange-360x269.png 360w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-serrated-vs-plain-flange-723x540.png 723w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-serrated-vs-plain-flange-150x112.png 150w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-serrated-vs-plain-flange-768x573.png 768w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/din6921-serrated-vs-plain-flange-16x12.png 16w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-kgfasrk elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"kgfasrk\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-ihfnt3a\" data-id=\"ihfnt3a\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-v1m8xnf elementor-widget elementor-widget-heading\" data-id=\"v1m8xnf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">C\u00e1ch \u0111\u1eb7t h\u00e0ng DIN6921 \u2014 \u0110\u1ecbnh d\u1ea1ng th\u00f4ng s\u1ed1<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-djc3fkt elementor-widget elementor-widget-text-editor\" data-id=\"djc3fkt\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t\n<p><strong>\u0110\u1ecbnh d\u1ea1ng \u0111\u1eb7t h\u00e0ng ti\u00eau chu\u1ea9n cho DIN6921 l\u00e0: Bu l\u00f4ng DIN6921 \u2013 [Ren] \u00d7 [Chi\u1ec1u d\u00e0i] \u2013 [C\u1ea5p] \u2013 [C\u00f3 r\u0103ng c\u01b0a ho\u1eb7c tr\u1ed1ng].<\/strong><\/p>\n<p>V\u00ed d\u1ee5: <code style=\"background:#f4f4f4;padding:2px 6px;border-radius:3px;font-family:monospace;\">Bu l\u00f4ng DIN6921 \u2013 M10 \u00d7 30 \u2013 8.8 \u2013 C\u00f3 r\u0103ng c\u01b0a<\/code><\/p>\n<ul>\n<li><strong>M10<\/strong> = \u0110\u01b0\u1eddng k\u00ednh danh ngh\u0129a c\u1ee7a ren (ren th\u00f4 l\u00e0 m\u1eb7c \u0111\u1ecbnh; th\u00eam b\u01b0\u1edbc ren cho ren m\u1ecbn: M10\u00d71.25)<\/li>\n<li><strong>30<\/strong> = Chi\u1ec1u d\u00e0i danh ngh\u0129a t\u00ednh b\u1eb1ng mm, \u0111o t\u1eeb <em>m\u1eb7t d\u01b0\u1edbi c\u1ee7a m\u1eb7t b\u00edch<\/em> \u2014 KH\u00d4NG bao g\u1ed3m \u0111\u1ed9 s\u00e2u m\u1eb7t b\u00edch h<\/li>\n<li><strong>8.8<\/strong> = C\u1ea5p \u0111\u1ed9 b\u1ec1n (ho\u1eb7c inox: A2-70, A4-80, v.v.)<\/li>\n<li><strong>C\u00f3 r\u0103ng c\u01b0a<\/strong> = Ch\u1ec9 \u0111\u1ecbnh r\u00f5 cho m\u1eb7t b\u00edch c\u00f3 v\u00e2n. M\u1eb7c \u0111\u1ecbnh (kh\u00f4ng c\u00f3 h\u1eadu t\u1ed1) = m\u1eb7t b\u00edch tr\u01a1n<\/li>\n<\/ul>\n<p><strong>Khi n\u00e0o n\u00ean ch\u1ecdn DIN6921 thay v\u00ec DIN931\/DIN933:<\/strong><\/p>\n<ul>\n<li>\u0110\u1ec3 lo\u1ea1i b\u1ecf v\u00f2ng \u0111\u1ec7m ph\u1eb3ng ri\u00eang bi\u1ec7t kh\u1ecfi danh s\u00e1ch v\u1eadt li\u1ec7u \u2014 DIN6921 th\u01b0\u1eddng c\u00f3 gi\u00e1 cao h\u01a1n 15\u201325% cho m\u1ed7i ch\u1ed1t nh\u01b0ng lo\u1ea1i b\u1ecf ho\u00e0n to\u00e0n v\u00f2ng \u0111\u1ec7m, gi\u1ea3m chi ph\u00ed t\u1ed5ng th\u1ec3 v\u00e0 th\u1eddi gian l\u1eafp r\u00e1p<\/li>\n<li>Khi \u1ee9ng d\u1ee5ng c\u00f3 rung \u0111\u1ed9ng v\u00e0 b\u1ea1n mu\u1ed1n gi\u1ea3i ph\u00e1p t\u1ef1 kh\u00f3a m\u1ed9t th\u00e0nh ph\u1ea7n (bi\u1ebfn th\u1ec3 c\u00f3 r\u0103ng c\u01b0a)<\/li>\n<li>Khi b\u1eaft v\u00edt v\u00e0o t\u1ea5m kim lo\u1ea1i m\u1ecfng d\u01b0\u1edbi 3mm m\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng k\u00e9o xuy\u00ean quan tr\u1ecdng<\/li>\n<li>Khi robot ho\u1eb7c h\u1ec7 th\u1ed1ng si\u1ebft t\u1ef1 \u0111\u1ed9ng l\u1eafp \u0111\u1eb7t ch\u1ed1t v\u00e0 v\u00f2ng \u0111\u1ec7m r\u1eddi g\u00e2y ra v\u1ea5n \u0111\u1ec1 c\u1ea5p li\u1ec7u ho\u1eb7c k\u1eb9t<\/li>\n<li>Khi b\u1ec1 m\u1eb7t ch\u1ecbu l\u1ef1c d\u01b0\u1edbi \u0111\u1ea7u l\u1ee5c gi\u00e1c ti\u00eau chu\u1ea9n t\u1ea1o ra t\u1eadp trung \u1ee9ng su\u1ea5t kh\u00f4ng ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c tr\u00ean v\u1eadt li\u1ec7u m\u1ec1m ho\u1eb7c v\u1eadt li\u1ec7u t\u1ed5ng h\u1ee3p<\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-cl5no2t elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"cl5no2t\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-54o7lxf\" data-id=\"54o7lxf\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-y6hpfis elementor-widget elementor-widget-heading\" data-id=\"y6hpfis\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 DIN6921<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-kjsesjv elementor-widget elementor-widget-accordion\" data-id=\"kjsesjv\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"accordion.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-accordion\">\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<h3 id=\"elementor-tab-title-141\" class=\"elementor-tab-title\" data-tab=\"1\" role=\"button\" aria-controls=\"elementor-tab-content-141\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><svg class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><svg class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa DIN6921 v\u00e0 DIN933 l\u00e0 g\u00ec?<\/a>\n\t\t\t\t\t<\/h3>\n\t\t\t\t\t<div id=\"elementor-tab-content-141\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"1\" role=\"region\" aria-labelledby=\"elementor-tab-title-141\">DIN6921 c\u00f3 m\u1eb7t b\u00edch t\u00edch h\u1ee3p (\u0111\u0129a m\u1edf r\u1ed9ng) d\u01b0\u1edbi \u0111\u1ea7u ch\u1ed1t gi\u00fap ph\u00e2n ph\u1ed1i l\u1ef1c k\u1eb9p l\u00ean b\u1ec1 m\u1eb7t ch\u1ecbu l\u1ef1c r\u1ed9ng h\u01a1n v\u00e0 lo\u1ea1i b\u1ecf nhu c\u1ea7u d\u00f9ng v\u00f2ng \u0111\u1ec7m ri\u00eang bi\u1ec7t. DIN933 l\u00e0 ch\u1ed1t l\u1ee5c gi\u00e1c ren to\u00e0n ph\u1ea7n ti\u00eau chu\u1ea9n kh\u00f4ng c\u00f3 m\u1eb7t b\u00edch. DIN6921 \u0111\u01b0\u1ee3c \u01b0u ti\u00ean s\u1eed d\u1ee5ng trong c\u00e1c c\u1ee5m c\u00f3 rung \u0111\u1ed9ng ho\u1eb7c t\u1ea5m m\u1ecfng, n\u01a1i c\u1ea7n di\u1ec7n t\u00edch ch\u1ecbu l\u1ef1c r\u1ed9ng h\u01a1n ho\u1eb7c kh\u1ea3 n\u0103ng t\u1ef1 kh\u00f3a.<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<h3 id=\"elementor-tab-title-142\" class=\"elementor-tab-title\" data-tab=\"2\" role=\"button\" aria-controls=\"elementor-tab-content-142\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><svg class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><svg class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Bi\u1ebfn th\u1ec3 c\u00f3 r\u0103ng c\u01b0a c\u1ee7a DIN6921 c\u00f3 t\u00e1c d\u1ee5ng g\u00ec?<\/a>\n\t\t\t\t\t<\/h3>\n\t\t\t\t\t<div id=\"elementor-tab-content-142\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"2\" role=\"region\" aria-labelledby=\"elementor-tab-title-142\">Bi\u1ebfn th\u1ec3 m\u1eb7t b\u00edch c\u00f3 r\u0103ng c\u01b0a (v\u00e2n) c\u00f3 c\u00e1c r\u0103ng h\u01b0\u1edbng t\u00e2m \u1edf m\u1eb7t d\u01b0\u1edbi m\u1eb7t b\u00edch, khi si\u1ebft s\u1ebd \u0103n v\u00e0o b\u1ec1 m\u1eb7t v\u1eadt li\u1ec7u, t\u1ea1o hi\u1ec7u \u1ee9ng kh\u00f3a c\u01a1 h\u1ecdc ch\u1ed1ng l\u1ecfng khi rung \u0111\u1ed9ng. N\u00f3 thay th\u1ebf nhu c\u1ea7u d\u00f9ng v\u00f2ng \u0111\u1ec7m kh\u00f3a ri\u00eang bi\u1ec7t trong h\u1ea7u h\u1ebft c\u00e1c \u1ee9ng d\u1ee5ng tr\u00ean b\u1ec1 m\u1eb7t th\u00e9p c\u1ee9ng.<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<h3 id=\"elementor-tab-title-143\" class=\"elementor-tab-title\" data-tab=\"3\" role=\"button\" aria-controls=\"elementor-tab-content-143\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><svg class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><svg class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Chi\u1ec1u d\u00e0i danh ngh\u0129a c\u1ee7a ch\u1ed1t m\u1eb7t b\u00edch DIN6921 \u0111\u01b0\u1ee3c \u0111o nh\u01b0 th\u1ebf n\u00e0o?<\/a>\n\t\t\t\t\t<\/h3>\n\t\t\t\t\t<div id=\"elementor-tab-content-143\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"3\" role=\"region\" aria-labelledby=\"elementor-tab-title-143\">Chi\u1ec1u d\u00e0i danh ngh\u0129a \u0111\u01b0\u1ee3c \u0111o t\u1eeb m\u1eb7t d\u01b0\u1edbi c\u1ee7a m\u1eb7t b\u00edch (kh\u00f4ng ph\u1ea3i t\u1eeb \u0111\u1ec9nh \u0111\u1ea7u ch\u1ed1t) \u0111\u1ebfn \u0111\u1ea7u cu\u1ed1i c\u1ee7a ch\u1ed1t. \u0110\u1ed9 s\u00e2u m\u1eb7t b\u00edch h KH\u00d4NG \u0111\u01b0\u1ee3c t\u00ednh v\u00e0o chi\u1ec1u d\u00e0i danh ngh\u0129a. \u0110i\u1ec1u n\u00e0y kh\u00e1c v\u1edbi ch\u1ed1t l\u1ee5c gi\u00e1c ti\u00eau chu\u1ea9n, n\u01a1i chi\u1ec1u d\u00e0i \u0111\u01b0\u1ee3c \u0111o t\u1eeb m\u1eb7t d\u01b0\u1edbi \u0111\u1ea7u ch\u1ed1t \u2014 h\u00e3y l\u01b0u \u00fd \u0111i\u1ec1u n\u00e0y khi t\u00ednh chi\u1ec1u d\u00e0i ch\u1ed1t cho m\u1ed9t c\u1ee5m k\u1eb9p nh\u1ea5t \u0111\u1ecbnh.<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<h3 id=\"elementor-tab-title-144\" class=\"elementor-tab-title\" data-tab=\"4\" role=\"button\" aria-controls=\"elementor-tab-content-144\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><svg class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><svg class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">DIN6921 c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng v\u1edbi c\u00e1c b\u1ed9 ph\u1eadn b\u1eb1ng nh\u00f4m ho\u1eb7c nh\u1ef1a kh\u00f4ng?<\/a>\n\t\t\t\t\t<\/h3>\n\t\t\t\t\t<div id=\"elementor-tab-content-144\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"4\" role=\"region\" aria-labelledby=\"elementor-tab-title-144\">C\u00f3, nh\u01b0ng ch\u1ec9 s\u1eed d\u1ee5ng lo\u1ea1i m\u1eb7t b\u00edch tr\u01a1n (kh\u00f4ng c\u00f3 r\u0103ng c\u01b0a). Phi\u00ean b\u1ea3n c\u00f3 r\u0103ng c\u01b0a s\u1ebd l\u00e0m h\u1ecfng b\u1ec1 m\u1eb7t m\u1ec1m. \u0110\u1ed1i v\u1edbi nh\u00f4m, n\u00ean d\u00f9ng DIN6921 b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9 A2 ho\u1eb7c A4 \u0111\u1ec3 tr\u00e1nh \u0103n m\u00f2n \u0111i\u1ec7n h\u00f3a t\u1ea1i giao di\u1ec7n nh\u00f4m\u2013th\u00e9p carbon.<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<h3 id=\"elementor-tab-title-145\" class=\"elementor-tab-title\" data-tab=\"5\" role=\"button\" aria-controls=\"elementor-tab-content-145\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><svg class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><svg class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Ti\u00eau chu\u1ea9n ISO t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi DIN6921 l\u00e0 g\u00ec?<\/a>\n\t\t\t\t\t<\/h3>\n\t\t\t\t\t<div id=\"elementor-tab-content-145\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"5\" role=\"region\" aria-labelledby=\"elementor-tab-title-145\">DIN6921 t\u01b0\u01a1ng \u1ee9ng v\u1edbi ISO 15071 (bu l\u00f4ng m\u1eb7t b\u00edch tr\u01a1n) v\u00e0 ISO 15072 (bu l\u00f4ng m\u1eb7t b\u00edch c\u00f3 r\u0103ng c\u01b0a). C\u00e1c ti\u00eau chu\u1ea9n ISO n\u00e0y c\u00f3 k\u00edch th\u01b0\u1edbc t\u01b0\u01a1ng th\u00edch v\u00e0 ph\u1ea7n l\u1edbn c\u00f3 th\u1ec3 thay th\u1ebf cho DIN6921. B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 th\u1ea5y tham chi\u1ebfu \u0111\u1ebfn ISO 4162 (bu l\u00f4ng l\u1ee5c gi\u00e1c c\u00f3 m\u1eb7t b\u00edch, lo\u1ea1i nh\u1ecf) \u2014 ti\u00eau chu\u1ea9n n\u00e0y bao g\u1ed3m m\u1ed9t d\u1ea3i s\u1ea3n ph\u1ea9m li\u00ean quan ch\u1eb7t ch\u1ebd.<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-t4hv0zh elementor-widget elementor-widget-image\" data-id=\"t4hv0zh\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1376\" height=\"768\" src=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/04-closing-17.png\" class=\"attachment-full size-full wp-image-4063\" alt=\"B\u1ed9 bu l\u00f4ng v\u00e0 v\u00edt c\u00f4ng nghi\u1ec7p \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp v\u1edbi nhi\u1ec1u k\u00edch th\u01b0\u1edbc g\u1ed3m M6, M8, M10, M12 v\u00e0 M16, \u0111\u01b0\u1ee3c tr\u01b0ng b\u00e0y trong h\u1ed9p nh\u1ef1a \u0111en d\u00f9ng cho s\u1ea3n xu\u1ea5t v\u00e0 l\u1eafp r\u00e1p\" srcset=\"https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/04-closing-17.png 1376w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/04-closing-17-360x201.png 360w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/04-closing-17-800x447.png 800w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/04-closing-17-150x84.png 150w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/04-closing-17-768x429.png 768w, https:\/\/productionscrews.com\/wp-content\/uploads\/2026\/05\/04-closing-17-18x10.png 18w\" sizes=\"(max-width: 1376px) 100vw, 1376px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-uely3wy elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"uely3wy\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-55hygxc\" data-id=\"55hygxc\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-s0x08t2 elementor-widget elementor-widget-heading\" data-id=\"s0x08t2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">S\u1eb5n s\u00e0ng \u0111\u1eb7t h\u00e0ng bu l\u00f4ng m\u1eb7t b\u00edch l\u1ee5c gi\u00e1c DIN6921?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4t4uopt elementor-widget elementor-widget-text-editor\" data-id=\"4t4uopt\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p style=\"text-align:center;color:#CBD5E0;font-size:16px;max-width:600px;margin:0 auto 28px;\">Kh\u00e1m ph\u00e1 \u0111\u1ea7y \u0111\u1ee7 c\u00e1c lo\u1ea1i s\u1ea3n ph\u1ea9m theo k\u00edch th\u01b0\u1edbc, c\u1ea5p \u0111\u1ed9 v\u00e0 b\u1ec1 m\u1eb7t ho\u00e0n thi\u1ec7n. Gi\u00e1 s\u1ec9 t\u1eeb 500 chi\u1ebfc. H\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt cho c\u00e1c lo\u1ea1i chi\u1ec1u d\u00e0i \u0111\u1eb7c bi\u1ec7t v\u00e0 ren m\u1ecbn.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-nknc3vv elementor-align-center elementor-widget elementor-widget-button\" data-id=\"nknc3vv\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/productionscrews.com\/vi\/\" target=\"_blank\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Xem c\u00e1c s\u1ea3n ph\u1ea9m DIN6921<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-1p7ltor elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"1p7ltor\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-9mn5rr5\" data-id=\"9mn5rr5\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-c67nrxp elementor-widget elementor-widget-heading\" data-id=\"c67nrxp\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Ti\u00eau chu\u1ea9n li\u00ean quan v\u1ec1 bulong, \u1ed1c v\u00edt<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-tnr7nbj elementor-widget elementor-widget-text-editor\" data-id=\"tnr7nbj\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t\n<p>Kh\u00e1m ph\u00e1 c\u00e1c ti\u00eau chu\u1ea9n ch\u1ed1t li\u00ean k\u1ebft li\u00ean quan trong th\u01b0 vi\u1ec7n s\u1ea3n ph\u1ea9m c\u1ee7a ch\u00fang t\u00f4i:<\/p>\n<ul style=\"line-height:2.2;\">\n<li><a href=\"https:\/\/productionscrews.com\/vi\/din931-hex-bolt\/\" style=\"color:#2563EB;font-weight:500;\" target=\"_blank\">Bu l\u00f4ng l\u1ee5c gi\u00e1c DIN931 (ren m\u1ed9t ph\u1ea7n)<\/a> \u2014 cho c\u00e1c \u1ee9ng d\u1ee5ng c\u1ea7n ph\u1ea7n th\u00e2n kh\u00f4ng ren<\/li>\n<li><a href=\"https:\/\/productionscrews.com\/vi\/din933-hex-bolt\/\" style=\"color:#2563EB;font-weight:500;\" target=\"_blank\">Bu l\u00f4ng l\u1ee5c gi\u00e1c DIN933 (ren to\u00e0n ph\u1ea7n)<\/a> \u2014 bu l\u00f4ng l\u1ee5c gi\u00e1c ren to\u00e0n ph\u1ea7n ti\u00eau chu\u1ea9n, l\u1ef1a ch\u1ecdn thay th\u1ebf tr\u01a1n cho DIN6921<\/li>\n<li><a href=\"https:\/\/productionscrews.com\/vi\/din6923-hex-flange-nut\/\" style=\"color:#2563EB;font-weight:500;\" target=\"_blank\">\u0110ai \u1ed1c m\u1eb7t b\u00edch l\u1ee5c gi\u00e1c DIN6923<\/a> \u2014 \u0111ai \u1ed1c m\u1eb7t b\u00edch ph\u00f9 h\u1ee3p, k\u1ebft h\u1ee3p v\u1edbi DIN6921 \u0111\u1ec3 ph\u00e2n b\u1ed5 t\u1ea3i tr\u1ecdng t\u1ed1i \u0111a<\/li>\n<li><a href=\"https:\/\/productionscrews.com\/vi\/din938-stud-bolt\/\" style=\"color:#2563EB;font-weight:500;\" target=\"_blank\">Bu l\u00f4ng hai \u0111\u1ea7u DIN938<\/a> \u2014 thanh ren d\u00f9ng cho c\u00e1c \u1ee9ng d\u1ee5ng l\u1eafp \u0111\u1eb7t c\u1ed1 \u0111\u1ecbnh<\/li>\n<li><a href=\"https:\/\/productionscrews.com\/vi\/din939-stud-bolt\/\" style=\"color:#2563EB;font-weight:500;\" target=\"_blank\">Bu l\u00f4ng hai \u0111\u1ea7u DIN939<\/a> \u2014 bu l\u00f4ng hai \u0111\u1ea7u v\u1edbi ph\u1ea7n g\u1eafn d\u00e0i h\u01a1n cho c\u00e1c v\u1ecf ren s\u00e2u<\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Complete DIN6921 hex flange bolt guide: M5\u2013M20 dimension tables, serrated vs plain flange selection, grades 8.8\u201312.9 and A2\/A4, and full comparison with DIN931 and DIN933.<\/p>","protected":false},"author":1,"featured_media":4058,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-4066","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/pages\/4066","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/comments?post=4066"}],"version-history":[{"count":8,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/pages\/4066\/revisions"}],"predecessor-version":[{"id":4190,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/pages\/4066\/revisions\/4190"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/media\/4058"}],"wp:attachment":[{"href":"https:\/\/productionscrews.com\/vi\/wp-json\/wp\/v2\/media?parent=4066"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}