DIN 7981
Specification
| All measurements in millimeters (mm) | ||||
| d1 | k max | d2 max | m approx. | Cross recess No. |
| 2.2 | 1.8 | 4.2 | 2.6 | H1 |
| 2.9 | 2.2 | 5.6 | 3 | H1 |
| 3.5 | 2.6 | 6.9 | 4.2 | H2 |
| 3.9 | 2.8 | 7.5 | 4.4 | H2 |
| 4.2 | 3.05 | 8.2 | 4.6 | H2 |
| 4.8 | 3.55 | 9.5 | 5 | H2 |
| 5.5 | 3.95 | 10.8 | 6.5 | H3 |
| 6.3 | 4.55 | 12.5 | 7.1 | H3 |
| 8 | 5.25 | 15.8 | – | – |