Metric Bolts - Tightening Torques
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Maximum recommended tightening torque for coarse threaded metric steel bolts:
| Size (mm) | Max. Tightening Torque (Nm) | |||
|---|---|---|---|---|
| Property Class | ||||
| Grade 8.8 | Grade 9.8 | Grade 10.9 | Grade 12.9 | |
| M5 | 7.0 | 7.8 | 10.0 | 11.7 |
| M6 | 11.8 | 13.3 | 17.0 | 19.9 |
| M8 | 28.8 | 32.3 | 41.3 | 48.3 |
| M10 | 57.3 | 64.1 | 81.8 | 95.7 |
| M12 | 99.8 | 112 | 143 | 167 |
| M16 | 248 | 277 | 354 | 413 |
| M20 | 500 | 690 | 809 | |
| M24 | 865 | 1195 | 1395 | |
| M30 | 1719 | 2377 | 2774 | |
- coarse threaded
- lightly oiled threads
- tension 85% of proof load
- Bolt Torque Calculator
- US Bolts - Tightening Torques
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Related Topics
• Fasteners
Bolts, nuts and threaded rods - torque, tension and loads.
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