Quick answer: what replaces DIN 914?
ISO 4027 is the current successor for DIN 914 headless hexagon-socket set screws with cone point. DIN 914:1980-12 is withdrawn, but its number remains common on legacy drawings, replacement parts and commercial catalogues. The current standards chain is:
DIN 914:1980-12 → DIN EN ISO 4027:2004-05 → DIN EN ISO 4027:2026-06 / ISO 4027:2026
Current ISO terminology describes the working end as a truncated cone point. A successor number does not by itself approve a replacement: verify the thread, length, socket, point geometry, material, hardness, coating and applicable edition.
DIN 914 cross-reference at a glance
| Standard | Product or scope | Replacement guidance |
|---|---|---|
| DIN 914:1980-12 | Hexagon socket set screw with cone point | Withdrawn legacy DIN reference |
| ISO 4027:2026 | Metric coarse-thread set screw with truncated cone point | Primary current international reference |
| DIN EN ISO 4027:2026-06 | German adoption of current ISO 4027 | Preferred current DIN/EN/ISO reference |
| UNI 5927 | Italian cone-point hexagon socket set screw | Established national cross-reference; verify the cited edition |
| JIS B 1177 | Japanese standard covering multiple set-screw point types | Specify the cone-point type and compare its controlled edition |
| ASME B18.3.6M | Corresponding metric socket set-screw standard | Verify dimensions and mechanical requirements; do not assume direct identity |
These standards identify the corresponding product family. They do not make every catalogued item automatically interchangeable.
How the cone point works
The cone point concentrates contact into a small area. It may seat into a prepared dimple in a shaft, improve location and provide stronger resistance to axial movement than a flat point in a suitable joint. This engagement depends on point geometry, dimple geometry, tightening condition and the materials of both parts; the standard number alone does not provide a universal holding-load value.
The concentrated contact normally marks or indents the mating surface. Where a finished shaft must be protected or a component will be repositioned frequently, a DIN 913 / ISO 4026 flat-point set screw may be more suitable. Reuse is not automatic: inspect the cone point, mating dimple, socket and threads after removal.
View the DIN 914 drawing and dimensions, or compare the related DIN 913 / ISO 4026 flat-point standard.
Current status, size range and thread scope
ISO 4027:2026 and DIN EN ISO 4027:2026-06 are the current references. The reported current coarse-thread range is M1.6–M30 for steel and M1.6–M24 for stainless steel. Older drawings may cite withdrawn editions or a thread pitch outside the current coarse-pitch scope.
Do not silently convert a callout such as M12 × 1.5 DIN 914 into an unqualified coarse-thread ISO 4027 item. Preserve the complete thread designation and confirm whether the part is covered by the selected edition or must remain drawing-controlled.
What must match before substitution?
| Check | Why it matters |
|---|---|
| Thread diameter, pitch and tolerance | Determines assembly and thread engagement |
| Nominal length and tolerance | Controls installed depth and point position |
| Hexagon socket size and depth | Affects tool fit and torque transfer |
| Truncated-cone point geometry | Controls contact, indentation and dimple engagement |
| Material and hardness class | Affects socket, point and thread deformation |
| Coating and lubrication | Affect corrosion, fit, friction and installation torque |
| Standard edition | Defines the dimensional and acceptance requirements |
ASME B18.3.6M is a corresponding metric reference, not an automatic dimension-for-dimension replacement. For JIS B 1177, require the cone-point configuration because the standard covers more than one point type.
Do not confuse the four set-screw point families
| Current ISO | Legacy DIN | Point form | Typical selection reason |
|---|---|---|---|
| ISO 4026 | DIN 913 | Flat point | Broader contact and less aggressive marking |
| ISO 4027 | DIN 914 | Truncated cone point | Concentrated contact, indentation or prepared dimple |
| ISO 4028 | DIN 915 | Dog point | Positive location in a matching hole or slot |
| ISO 4029 | DIN 916 | Cup point | Rim contact that bites into the mating surface |
Changing only the point style can change holding behaviour and damage to the mating part. DIN 913, DIN 915 and DIN 916 are therefore not default substitutes for DIN 914 even when diameter and length match.
Hardness, material and loading
DIN 914 / ISO 4027 set screws use the mechanical-property framework for set screws, not ordinary bolt property classes such as 8.8, 10.9 or 12.9. A hardened-steel product is often sold as 45H, but the dimensional standard does not make every item 45H. State the required hardness class or stainless-steel grade separately and use the applicable mechanical-property specification.
Set screws are not intended to serve as tensile-loaded bolts. A radially installed cone point may resist shaft movement through friction and point engagement, but the complete joint—not the product designation—determines capacity. Coating, lubrication and hydrogen-embrittlement controls for hardened steel must also be specified where relevant.
Selection and installation checklist
For a controlled replacement or purchase order, specify:
- ISO 4027 or DIN EN ISO 4027 and the required edition
- Truncated cone-point configuration
- Thread diameter, pitch, tolerance and length
- Socket and point dimensions when drawing-critical
- Steel hardness class or stainless-steel grade
- Coating, lubrication and inspection requirements
- Whether the point seats on a plain surface or in a prepared dimple
- Approval for any change from a legacy drawing
Use the correct undamaged hex key with full socket engagement, and do not compensate for poor seating by applying uncontrolled torque. For safety-critical axial retention, verify the assembled joint or add a positive feature such as a key, pin, shoulder or groove. Use current ISO 4027 / DIN EN ISO 4027 for new specifications while retaining DIN 914 where a legacy drawing must remain unchanged.