DIN 7980 Specifications
All measurements in millimeters (mm)
d1 | used for | s | d2 |
3.1 | M3 | 1 | 5.6 |
4.1 | M4 | 1.2 | 7 |
5.1 | M5 | 1.6 | 8.8 |
6.1 | M6 | 1.6 | 9.9 |
8.1 | M8 | 2 | 12.7 |
10.2 | M10 | 2.5 | 16 |
12.2 | M12 | 2.5 | 18 |
14.2 | M14 | 3 | 21.1 |
16.2 | M16 | 3.5 | 24.4 |
18.2 | M18 | 3.5 | 26.4 |
20.2 | M20 | 4.5 | 30.6 |
22.5 | M22 | 4.5 | 32.9 |
24.5 | M24 | 5 | 35.9 |
27.5 | M27 | 5 | 38.9 |
30.5 | M30 | 6 | 44.1 |
33.5 | M33 | 6 | 47.1 |
36.5 | M36 | 7 | 52.2 |
The principle of anti-loosening of spring washers:
The principle of the loose stop of the spring washer is that after the spring washer is flattened, the spring washer generates a certain spring force, so that the screw connection part of the nut and the bolt maintains friction, thereby preventing the loosening of the nut. At the same time, the acute corners of the opening of the spring washer are respectively inserted into the surface of the bolt and the connecting member, thereby preventing the bolt from rotating the connecting member.
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