ISO 4028 dimensions — Hexagon socket set screws with dog point
- Edition
- dimensions from the 2003 edition · current edition ISO 4028:2026
DIN 915 redirects here. ISO 4028 supersedes it in modified form — the two are related but not identical. DIN 915 states the relationship as “ISO 4028 modified”. DIN 915 additionally records M1.4, M1.8, M14, M18, M22, which this table does not carry. We supply those sizes to the DIN 915 drawing — send it with the enquiry.
| Size | PThread pitch | sHex socket size | tKey engagement, short length | dpPoint diameter | zPoint length, short type | Short length limit | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| min | min | min | max | min | min | max | max | ||||
| M1.6 | 0.35 | 0.7 | 0.7 | 1.5 | 0.55 | 0.8 | 0.4 | 0.8 | 0.65 | 1.05 | 2.5 |
| M2 | 0.4 | 0.9 | 0.8 | 1.7 | 0.75 | 1 | 0.5 | 1 | 0.75 | 1.25 | 3 |
| M2.5 | 0.45 | 1.3 | 1.2 | 2 | 1.25 | 1.5 | 0.63 | 1.25 | 0.88 | 1.5 | 4 |
| M3 | 0.5 | 1.5 | 1.2 | 2 | 1.75 | 2 | 0.75 | 1.5 | 1 | 1.75 | 5 |
| M4 | 0.7 | 2 | 1.5 | 2.5 | 2.25 | 2.5 | 1 | 2 | 1.25 | 2.25 | 6 |
| M5 | 0.8 | 2.5 | 2 | 3 | 3.2 | 3.5 | 1.25 | 2.5 | 1.5 | 2.75 | 6 |
| M6 | 1 | 3 | 2 | 3.5 | 3.7 | 4 | 1.5 | 3 | 1.75 | 3.25 | 8 |
| M8 | 1.25 | 4 | 3 | 5 | 5.2 | 5.5 | 2 | 4 | 2.25 | 4.3 | 10 |
| M10 | 1.5 | 5 | 4 | 6 | 6.64 | 7 | 2.5 | 5 | 2.75 | 5.3 | 12 |
| M12 | 1.75 | 6 | 4.8 | 8 | 8.14 | 8.5 | 3 | 6 | 3.25 | 6.3 | 16 |
| M16 | 2 | 8 | 6.4 | 10 | 11.57 | 12 | 4 | 8 | 4.3 | 8.36 | 20 |
| M20 | 2.5 | 10 | 8 | 12 | 14.57 | 15 | 5 | 10 | 5.3 | 10.36 | 25 |
| M24 | 3 | 12 | 10 | 15 | 17.57 | 18 | 6 | 12 | 6.3 | 12.43 | 30 |
Dimensions from ISO 4028:2003. The current edition is ISO 4028:2026.