In the table below you will find the values associated with the different bolt sizes
- Bolt tension 50% yield strength/yield
- K-Factor of 0.16 (new bolt lubricated)
If the materials and/or sizes you use are not listed in the table below or if you would like to apply a different prestress to the bolted connections, please contact us for appropriate advice. This can be done by phone: +31 (0) 485-801476 or info@AnMa-TECH.nl
| Bout diameter |
L7, B7, B16 | Gr. 660 Class A,B,C |
Gr. 660 Class D |
B8 cl.2 |
| 1/2″ | 61 Nm | 50 Nm | 61 Nm | 49 Nm |
| 5/8″ | 122 Nm | 99 Nm | 122 Nm | 97 Nm |
| 3/4″ | 216 Nm | 176 Nm | 216 Nm | 174 Nm |
| 7/8″ | 338 Nm | 275 Nm | 338 Nm | 216 Nm |
| 1″ | 542 Nm | 441 Nm | 542 Nm | 347 Nm |
| 1-1/8″ | 745 Nm | 606 Nm | 745 Nm | 388 Nm |
| 1-1/4″ | 1084 Nm | 881 Nm | 1084 Nm | 564 Nm |
| 1-3/8″ | 1423 Nm | 1157 Nm | 1423 Nm | 569 Nm |
| 1-1/2″ | 1898 Nm | 1542 Nm | 1898 Nm | 759 Nm |
| 1-5/8″ | 2440 Nm | 1983 Nm | 2440 Nm | 976 Nm |
| 1-3/4″ | 3118 Nm | 2534 Nm | 3118 Nm | 1247 Nm |
| 1-7/8″ | 3796 Nm | 3084 Nm | 3796 Nm | 1518 Nm |
| 2″ | 4609 Nm | 3745 Nm | 4609 Nm | 1843 Nm |
| 2-1/4″ | 6643 Nm | 5398 Nm | 6643 Nm | 2657 Nm |
| 2-1/2″ | 9219 Nm | 7491 Nm | 9219 Nm | 3687 Nm |
| 2-3/4″ | 12337 Nm | 10025 Nm | 112337 Nm | 4935 Nm |
| 3″ | 16134 Nm | 13109 Nm | 16135 Nm | 6453 Nm |
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