Typically used to distribute the load over a larger bearing surface either positioned below the head of a bolt or below the nut. This even distribution over a larger area reduces the chance of damaging the bearing surface.
All measurements in millimeters (mm)
d1 | for thread size | d2 | s |
1.7 | M1.6 | 4 | 0.3 |
2.2 | M2 | 5 | 0.3 |
2.7 | M2.5 | 6 | 0.5 |
3.2 | M3 | 7 | 0.5 |
3.7 | M3.5 | 8 | 0.5 |
4.3 | M4 | 9 | 0.8 |
5.3 | M5 | 10 | 1 |
6.4 | M6 | 12 | 1.6 |
7.4 | M7 | 14 | 1.6 |
8.4 | M8 | 16 | 1.6 |
10.5 | M10 | 20 | 2 |
13 | M12 | 24 | 2.5 |
15 | M14 | 28 | 2.5 |
17 | M16 | 30 | 3 |
19 | M18 | 34 | 3 |
21 | M20 | 37 | 3 |
23 | M22 | 39 | 3 |
25 | M24 | 44 | 4 |
28 | M27 | 50 | 4 |
31 | M30 | 56 | 4 |
34 | M33 | 60 | 5 |
37 | M36 | 66 | 5 |
40 | M39 | 72 | 6 |
43 | M42 | 78 | 7 |
50 | M48 | 92 | 8 |
54 | M52 | 98 | 8 |
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