DIN 557
DIN 557 , Square Nuts Standard
 |
| Size | s max | s min | e | m max | m min | dw | m’ |
| M5 | 8 | 7.64 | 11.3 | 4.6 | 3.4 | 6.7 | 2.4 |
| M6 | 10 | 9.64 | 14.1 | 5.6 | 4.4 | 8.7 | 3.1 |
| M8 | 13 | 12.57 | 18.4 | 7.25 | 5.75 | 11.5 | 4.13 |
| M10 | 16 | 15.57 | 22.6 | 8.75 | 7.25 | 14.5 | 5.1 |
| M10 | 17 | 16.57 | 24 | 8.75 | 7.25 | 15.5 | 5.1 |
| M12 | 18 | 17.57 | 25.4 | 10.75 | 9.25 | 16.5 | 6.4 |
| M12 | 19 | 18.48 | 26.9 | 10.75 | 9.25 | 17.2 | 6.4 |
| M16 | 24 | 23.16 | 33.9 | 13.9 | 12.1 | 22 | 8.5 |
