Metric Bolts - Tightening Torques
Maximum recommended tightening torque for coarse threaded metric steel bolts:
Metric Bolts - Typical Tightening Torques 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
- Reduced Torque with Lubricated Bolts
Related Topics
Fasteners
Related Documents
Bolt Torque Calculator
Improvised Torque Wrench
ISO 724 - Metric Threads
Metric Bolt Heads and Wrench Sizes
Metric Bolts - Minimum Ultimate Tensile and Proof Loads
Metric Nuts - Proof Loads
Metric Steel Bolts - Grades and Property Classes
Reduced Torque with Lubricated Bolts
Threaded Bolts - Stress Area
Threaded Rods - Loads in Imperial Units
US Bolts - Tightening Torques
Whitworth Bolt Torques
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