Standard Bolt Tightening Tension
| Bolt Size | Strength Grade (N) | |||
|---|---|---|---|---|
| 6.8 | 8.8 | 10.9 | 12.9 | |
| M3 | 1,690 | 2,176 | 3,058 | 3,675 |
| M4 | 2,540 | 3,822 | 5,341 | 6,419 |
| M5 | 4,790 | 6,223 | 8,771 | 10,486 |
| M6 | 6,750 | 8,820 | 12,348 | 14,798 |
| M8 | 12,400 | 13,377 | 22,736 | 27,342 |
| M10 | 19,750 | 25,676 | 36,162 | 43,414 |
| M12 | 28,790 | 37,534 | 52,920 | 63,210 |
| M14 | 39,540 | 51,450 | 72,520 | 86,730 |
| M16 | 54,420 | 71,540 | 99,960 | 120,540 |
| M18 | 66,130 | 86,240 | 121,520 | 145,040 |
| M20 | 85,040 | 111,720 | 156,800 | 188,160 |
| M22 | 106,320 | 138,180 | 195,020 | 234,220 |
| M24 | 122,450 | 160,720 | 225,400 | 270,480 |
| M27 | 161,290 | 210,700 | 295,960 | 355,740 |
| M30 | 196,550 | 256,760 | 360,640 | 433,160 |
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