When should I choose DIN914?

Choose DIN914 when you need a permanent, high-friction lock — typically on soft shafts, in pre-drilled detents, or for components that should never slip.

Will DIN914 mark the shaft?

Yes. The cone tip indents the mating shaft, which is by design. If you cannot accept a mark, use DIN913 (flat point) instead.

What size range is available?

M3 through M24 in standard lengths from 4 mm to 60 mm.

What grades do you supply?

Carbon steel 45H and 14.9, plus A2-70 and A4-70 stainless steel.

Do you offer custom point geometries?

Yes — DingLong Hardware can produce custom cone angles (60°, 75°, 120°) and combine cone-point with dog-point geometries on request.

DIN914 Cone Point Set Screw Manufacturer

Name: DIN 914 Cone Point Set Screw
Brand: DingLong Hardware
SKU: DIN914
Availability: InStock

DIN914 is a headless hexagon socket set screw with a tapered cone point (120° or 90°), identical to ISO 4027, used for permanent shaft locking in Class 45H carbon steel or stainless A2/A4.

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DIN914 Set Screw Quick Specifications

Standard

DIN914 / ISO 4027

Thread Size

M1.6 – M24

Point Type

Cone (120° / 90°)

Hardness

45H / A2-70 / A4-70

What Is a DIN914 Set Screw?

A DIN914 set screw is a fully headless hexagon socket set screw with a cone point — a tapered, pointed tip that concentrates clamping force into a precise contact zone on the mating surface. Also known as a cone point grub screw, DIN914 is fully threaded from end to end, meaning the nominal length equals the total screw length with no unthreaded shank.

The cone tip is the defining feature. Under tightening torque, the tip penetrates the surface of the shaft or workpiece, creating a mechanical indent that resists both axial sliding and torsional rotation. This makes DIN914 the highest-retention set screw type in the DIN standard family — more secure than DIN913 flat point or DIN916 cup point in single-use installations.

Key technical characteristics:

Cone point angle: 120° for larger sizes (M6 and above); 90° for smaller sizes (M5 and below)
Fully threaded: nominal length L = total screw length — no unthreaded shank
Hardness class: 45H — minimum 45 HRC surface hardness, core hardness 33–39 HRC
Product grade: Grade A per DIN EN ISO 4759-1
ISO equivalent: ISO 4027 — dimensionally identical to DIN914

Critical design trade-off: The sharp cone tip bites into the mating surface under tightening load. This creates higher axial and torsional holding force than a flat point, but leaves a permanent cone indent. DIN914 is best suited for applications where the joint is set once and the surface impression is acceptable.

See our full range of socket set screws →

DIN914 vs DIN913 vs DIN915 vs DIN916 — Full Comparison

All four DIN hex socket set screw standards share the same headless body — they differ only in tip geometry. Choosing the wrong tip type can damage mating surfaces, reduce holding force, or make disassembly impossible.

DIN914 ranks highest for holding force and vibration resistance, but lowest for reusability. The embedded cone tip resists dynamic loosening under vibration in a way that cup or flat point set screws cannot match.

Feature	DIN913 Flat Point	DIN914 Cone Point	DIN915 Dog Point	DIN916 Cup Point
ISO Equivalent	ISO 4026	ISO 4027	ISO 4028	ISO 4029
Point Shape	Flat smooth disc	Tapered sharp cone	Protruding cylinder pin	Concave cup / ring
Holding Force	Low–Medium	High ★	Medium–High	Medium–High
Surface Damage	Minimal	Permanent cone indent	None (pre-drilled hole)	Ring impression
Reusability	High	Low	High	Medium
Vibration Resistance	Low	High ★	High	Medium–High
Cone Tip Angle	—	120° (≥M6) / 90° (<M6)	—	—
Best Application	Hard surfaces, frequent adjustment	One-time shaft lock, soft metals	Precision axial location	General collars, handles

★ DIN914 cone point generates approximately 1.4× the torsional resistance of DIN916 cup point at equal tightening torque (same thread size). Source: Engineering Toolbox fastener friction data.

DIN914 Dimension Diagram

dt = cone tip flat diameter. s = hex socket AF (Allen key size). t = socket engagement depth. L = nominal / total length.

DIN914 Full Dimensions Table (M1.6–M24)

Per DIN914 / ISO 4027. All dimensions in mm. Cone angle: 120° for M6 and above; 90° for M5 and below.

Thread d	Pitch P (mm)	dt max (mm)	dt min (mm)	Socket e min (mm)	Hex s nom (mm — Allen key)	t short min (mm)	t long min (mm)
M1.6	0.35	0.40	—	0.809	0.7	0.7	1.5
M2	0.40	0.50	—	1.011	0.9	0.8	1.7
M2.5	0.45	0.65	—	1.454	1.3	1.2	2.0
M3	0.50	0.75	—	1.733	1.5	1.2	2.0
M4	0.70	1.00	—	2.303	2	1.5	2.5
M5	0.80	1.25	—	2.873	2.5	2.0	3.0
M6	1.00	1.50	0.90	3.443	3	2.0	3.5
M8	1.25	2.00	1.40	4.583	4	3.0	5.0
M10	1.50	2.50	1.90	5.723	5	4.0	6.0
M12	1.75	3.00	2.40	6.863	6	4.8	8.0
(M14)	2.00	4.00	3.25	6.863	6	5.6	9.0
M16	2.00	4.00	3.25	9.149	8	6.4	10.0
(M18)	2.50	5.00	4.25	11.429	10	7.2	11.0
M20	2.50	5.00	4.25	11.429	10	8.0	12.0
(M22)	2.50	6.00	5.25	13.716	12	9.0	13.5
M24	3.00	6.00	5.25	13.716	12	10.0	15.0

Sizes in parentheses (M14, M18, M22) are non-preferred per ISO 4027; availability may be limited. dt = cone tip flat diameter. s = hex socket AF (Allen key size). t = socket depth (short / long screws). Cone angle: 120° for M6 and above; 90° for M5 and below. Hardness class 45H: min 45 HRC surface.

Materials & Hardness Grades

DIN914 uses hardness classes — not the 8.8/10.9 bolt grade system. Class 45H is standard for carbon steel set screws (min. 45 HRC surface, 33–39 HRC core). Stainless grades use the A-class system (A2-70, A4-70).

Important: stainless DIN914 sacrifices hardness for corrosion resistance. A2-70 surface hardness is approximately 200 HV — adequate for soft metal shafts (aluminum, brass) but not for steel shafts above 200 HV.

Material	Grade	Typical Application
Carbon Steel (plain)	45H	Standard shaft locking, jigs, indoor machinery
Carbon Steel — Black Oxide	45H	Tooling, precision instruments, black finish required
Stainless A2 (304)	A2-70	Food equipment, light corrosion, aluminum/brass shafts
Stainless A4 (316)	A4-70	Marine, chemical, outdoor chloride environments

Key Applications

✔ Shaft-to-collar locking — conveyor drives, gearboxes, rotary indexers
✔ Soft metal shaft locking — aluminum, brass instrument shafts
✔ High-torque couplings — resists dynamic loosening under vibration
✔ Rotary encoders & potentiometers — M3/M4 set-once calibration joint
✔ CNC tool holder & arbor locking — set-once applications
✔ Automotive gear & sprocket retention — auxiliary drive shafts
✔ Security / tamper-resistant variant — pin-hex DIN914 with special driver

Limitation: Not suitable for frequently re-adjusted joints — each installation cycle deepens the cone indent and degrades grip accuracy.

Also available: DIN7984 Low Head Socket Cap Screw →

Cone Angle Explained — 120° vs 90°

DIN914 is the only set screw standard in the DIN family that uses two different cone angles depending on screw size — a point of frequent confusion in specifications.

120° cone (obtuse) — M6 and above: The wider angle creates a broader cone base and slightly lower penetration depth per unit torque. This distributes force over a larger surface area, reducing cone tip deformation risk on medium-carbon steel shafts.
90° cone (right angle) — M5 and below: The sharper angle creates deeper, narrower penetration per unit torque. For small screws, this compensates for the lower tightening torque achievable on fine threads.

Ordering note: Buyers do not need to specify the cone angle — the standard defines it automatically for each size. The correct geometry is supplied when you order by thread size.

Left: 120° cone (M6+) — wider base, more surface contact. Right: 90° cone (M5 and below) — sharper penetration for smaller screw torque. See the ISO 4027 standard for authoritative angle assignments per size.

DIN914 vs DIN913 — Selection Guide

Choose DIN914 (Cone Point) when:

→ Maximum axial and torsional holding force is required
→ The joint will be set once and not repeatedly adjusted
→ The mating surface is soft enough for cone penetration (aluminum, brass, mild steel)
→ Anti-vibration performance is critical — embedded cone resists loosening under dynamic loads
→ High axial load in one direction must be resisted — the cone acts like a mechanical key

Choose DIN913 (Flat Point) when:

→ The mating surface must not be damaged — decorative parts, mirror-finish shafts, thin-walled tubing
→ The joint needs frequent repositioning — jigs, measurement stops, optical carriages
→ A hard, smooth workpiece surface must be preserved
→ The application involves ceramics, glass, or materials where stress concentration would cause cracking

Ordering Format:

Set Screw DIN914 – M8 × 20 – 45H

M8 — nominal thread diameter
20 — nominal length in mm (= total screw length — fully headless)
45H — hardness class (carbon steel). For stainless: A2 or A4-70

For security variant: Set Screw DIN914 Pin Hex – M8 × 20 – 45H

FAQ: DIN914 Cone Point Set Screw

Technical questions about DIN914 selection, ordering, cone angles, materials, and ISO 4027 equivalence.

What is the difference between DIN914 and DIN913?

DIN914 has a tapered cone point that bites into the mating surface, providing high axial and torsional holding force but leaving a permanent cone indent. DIN913 has a flat smooth point that does not damage the surface, making it better for applications requiring frequent adjustment or surface preservation. DIN914 is chosen where maximum grip and vibration resistance are needed and the surface impression is acceptable.

What cone angle does DIN914 use?

DIN914 uses two cone angles depending on screw size: 120° for larger sizes (above the dimensional step, typically M6 and above) and 90° for smaller sizes. The angle is defined by the standard for each size — buyers do not need to specify the angle separately when ordering. Both variants are manufactured automatically per the dimensional tables in ISO 4027.

What is the ISO equivalent of DIN914?

DIN914 corresponds to ISO 4027 (hexagon socket set screws with cone point). Both standards are dimensionally identical. ISO 4027 is the internationally preferred designation, but DIN914 remains the common trade name in Europe and Asia. You can specify either designation and receive the same part.

Can DIN914 be used on stainless steel or hardened shafts?

DIN914 in carbon steel 45H can penetrate mild steel (up to approx. 300 HV) and aluminum shafts. For hardened shafts, the cone may not penetrate effectively — use a pre-drilled dimple or choose DIN915 dog point for precision location. Stainless A2/A4 DIN914 has lower surface hardness (approx. 200 HV) and is better suited for soft metals and corrosion-critical environments.

What parameters do I need when ordering DIN914 in bulk?

Provide: thread diameter and nominal length (e.g. M8×20), hardness class or material (e.g. 45H or A4-70), surface finish (plain / black oxide / zinc), quantity, and whether the standard or pin-hex security variant is required. Specify cone angle only if non-standard — the standard defines it by size. For quality-critical orders, also request a certificate of conformance for the 45H hardness class.

Related Fastener Standards

Complete your assembly with complementary socket fastener standards from our range.

DIN7984 Low Head Socket Cap Screw

Reduced-head hexagon socket cap screw — ideal for space-constrained assemblies.

Need DIN914 Set Screws in Bulk or Custom Specifications?

We supply DIN914 cone point set screws in carbon steel 45H, stainless A2/A4, plain, black oxide and zinc finish. Sizes M1.6–M24, custom lengths available. MOQ from 500 pcs. EN 10204 3.1 certificates and RoHS declarations available on all orders.