Torques for Metric Fasteners
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| NOTICE |
|---|
Be very careful never to mix metric with U.S. customary (standard) fasteners. Mismatched or incorrect fasteners causes machine damage or malfunction and can result in personal injury. Original fasteners removed from the machine should be saved for reassembly whenever possible. If new fasteners are needed, they must be of the same size and grade as the ones that are being replaced. The material strength identification is usually shown on the bolt head by numbers 8.8, 10.9, etc. The following charts give general torques for Metric bolts, nuts and taperlock studs of Grade 8.8. |
Note: Metric hardware must be replaced with metric hardware. Check the parts manual for proper replacement.
Torques for Bolts and Nuts
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| TORQUES FOR BOLTS AND FOR NUTS | ||
|---|---|---|
| METRIC ISO (1) THREAD | ||
| Thread Size | Standard Torque | |
| Metric | N·m (2) | lb ft |
| M6 | 12 ± 3 | 9 ± 2 |
| M8 | 28 ± 7 | 20 ± 5 |
| M10 | 55 ± 10 | 40 ± 7 |
| M12 | 100 ± 20 | 75 ± 15 |
| M14 | 160 ± 30 | 120 ± 22 |
| M16 | 240 ± 40 | 175 ± 30 |
| M20 | 460 ± 60 | 340 ± 45 |
| M24 | 800 ± 100 | 600 ± 75 |
| M30 | 1600 ± 200 | 1200 ± 150 |
| M36 | 2700 ± 300 | 2000 ± 225 |
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| ( 1 ) | International Standards Organization (ISO) |
| ( 2 ) | 1 Newton meter (N·m) is approximately 0.1 mkg. |
Torques for Taperlock Studs
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| TORQUES FOR TAPERLOCK STUDS | ||
|---|---|---|
| METRIC ISO (1) THREAD | ||
| Thread Size | Torque for Standard Taperlock Stud | |
| Metric | N·m (2) | lb ft |
| M6 | 8 ± 3 | 6 ± 2 |
| M8 | 17 ± 5 | 13 ± 4 |
| M10 | 35 ± 5 | 26 ± 4 |
| M12 | 65 ± 10 | 48 ± 7 |
| M16 | 110 ± 20 | 80 ± 15 |
| M20 | 170 ± 30 | 125 ± 22 |
| M24 | 400 ± 60 | 300 ± 45 |
| M30 | 750 ± 80 | 550 ± 60 |
| M36 | 1200 ± 150 | 890 ± 110 |
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| ( 1 ) | International Standards Organization (ISO) |
| ( 2 ) | 1 Newton meter (N·m) is approximately 0.1 mkg. |
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