DIN 7980
DIN 7980, Spring Lock Washer, known as Split Lock washer, spring washer, Made of spring steel, headened – HRC41-HRC46
Dimension of DIN 7980 as below:
 |
| Size | d min | d1 max | s (+/- 0.1) |
| M3 | 3.1 | 5.6 | 1 |
| M4 | 4.1 | 7 | 1.2 |
| M5 | 5.1 | 8.8 | 1.6 |
| M6 | 6.1 | 9.9 | 1.6 |
| M8 | 8.1 | 12.7 | 2 |
| M10 | 10.2 | 16 | 2.5 |
| M12 | 12.2 | 18 | 2.5 |
| M14 | 14.2 | 21.1 | 3 |
| M16 | 16.2 | 24.4 | 3.5 |
| M18 | 18.2 | 26.4 | 3.5 |
| M20 | 20.2 | 30.6 | 4.5 |
| M22 | 22.5 | 32.9 | 4.5 |
| M24 | 24.5 | 35.9 | 5 |
| M27 | 27.5 | 38.9 | 5 |
| M30 | 30.5 | 44.1 | 6 |
| M36 | 36.5 | 52.2 | 7 |
1. All size in mm ;