| Nominal size of bolt or screw | Tensile stress area | Grade of bolt | |
|---|---|---|---|
| 4.6 | 4.8 | ||
| Stress under proof load (N/mm2) | |||
| 222 | 286 | ||
| Proof Load | |||
| mm2 | N | N | |
| M5 | 14.2 | 3 152 | 4 061 |
| M6 | 20.1 | 4 462 | 5 748 |
| M8 | 36.6 | 8 125 | 10 907 |
| M10 | 58.0 | 12 876 | 16 588 |
| M12 | 84.3 | 18 715 | 25 110 |
| M16 | 157 | 34 854 | 44 902 |
| M20 | 245 | 54 390 | 70 070 |
| M24 | 353 | 78 366 | 100 958 |