M60 Bolt Torque
An M60 8.8 bolt with a coarse M60×5.5 thread needs about 12077.4 N·m (8907.8 ft·lb) when dry and 8910.9 N·m (6572.3 ft·lb) when oiled, tightened to 70% of yield (clamp force 1058.2 kN).
| Grade | Clamp forcepreload | Dryμ 0.15 | Oiledμ 0.11 | PTFE / moly pasteμ 0.06 |
|---|---|---|---|---|
| 4.6 | 396.8 kN89208 lbf | 4529.0 N·m3340.4 ft·lb | 3341.6 N·m2464.6 ft·lb | 2154.1 N·m1588.8 ft·lb |
| 4.8 | 529.1 kN118945 lbf | 6038.7 N·m4453.9 ft·lb | 4455.4 N·m3286.2 ft·lb | 2872.2 N·m2118.4 ft·lb |
| 5.6 | 496.0 kN111511 lbf | 5661.3 N·m4175.6 ft·lb | 4177.0 N·m3080.8 ft·lb | 2692.7 N·m1986.0 ft·lb |
| 5.8 | 661.4 kN148681 lbf | 7548.4 N·m5567.4 ft·lb | 5569.3 N·m4107.7 ft·lb | 3590.2 N·m2648.0 ft·lb |
| 6.8 | 793.6 kN178417 lbf | 9058.1 N·m6680.9 ft·lb | 6683.2 N·m4929.2 ft·lb | 4308.3 N·m3177.6 ft·lb |
| 8.8 | 1058.2 kN237889 lbf | 12077.4 N·m8907.8 ft·lb | 8910.9 N·m6572.3 ft·lb | 5744.3 N·m4236.8 ft·lb |
| 10.9 | 1488.1 kN334532 lbf | 16983.9 N·m12526.7 ft·lb | 12530.9 N·m9242.3 ft·lb | 8078.0 N·m5958.0 ft·lb |
| 12.9 | 1785.7 kN401438 lbf | 20380.6 N·m15032.0 ft·lb | 15037.1 N·m11090.8 ft·lb | 9693.6 N·m7149.6 ft·lb |
| Grade | Clamp forcepreload | Dryμ 0.15 | Oiledμ 0.11 | PTFE / moly pasteμ 0.06 |
|---|---|---|---|---|
| 4.6 | 417.4 kN93846 lbf | 4698.9 N·m3465.7 ft·lb | 3439.9 N·m2537.1 ft·lb | 2180.9 N·m1608.5 ft·lb |
| 4.8 | 556.6 kN125128 lbf | 6265.2 N·m4621.0 ft·lb | 4586.5 N·m3382.8 ft·lb | 2907.8 N·m2144.7 ft·lb |
| 5.6 | 521.8 kN117307 lbf | 5873.6 N·m4332.2 ft·lb | 4299.9 N·m3171.4 ft·lb | 2726.1 N·m2010.7 ft·lb |
| 5.8 | 695.7 kN156410 lbf | 7831.5 N·m5776.2 ft·lb | 5733.2 N·m4228.6 ft·lb | 3634.8 N·m2680.9 ft·lb |
| 6.8 | 834.9 kN187691 lbf | 9397.8 N·m6931.5 ft·lb | 6879.8 N·m5074.3 ft·lb | 4361.8 N·m3217.1 ft·lb |
| 8.8 | 1113.2 kN250255 lbf | 12530.4 N·m9242.0 ft·lb | 9173.1 N·m6765.7 ft·lb | 5815.7 N·m4289.4 ft·lb |
| 10.9 | 1565.4 kN351922 lbf | 17620.9 N·m12996.5 ft·lb | 12899.6 N·m9514.3 ft·lb | 8178.3 N·m6032.0 ft·lb |
| 12.9 | 1878.5 kN422306 lbf | 21145.1 N·m15595.8 ft·lb | 15479.5 N·m11417.1 ft·lb | 9813.9 N·m7238.4 ft·lb |
Torque for M60 hex head bolts and nuts, standard ISO/ASME heads on steel with a 66.0 mm clearance hole. Friction μ applies to both the threads and the bearing face. Always follow the manufacturer's value where one exists.
M60 thread and dimensions
- Coarse thread
- M60×5.5 — pitch 5.5 mm
- Fine thread
- M60×4 — pitch 4 mm
- Tensile stress area Aₛ
- 2362.0 mm² (coarse), 2484.8 mm² (fine)
- Pitch diameter d₂
- 56.428 mm
- Tap drill
- 54.5 mm (coarse), 56 mm (fine)
- Wrench size (hex head)
- 90 mm
- Clearance hole
- 66.0 mm
How the M60 torque is calculated
Preload is 70% of the bolt's yield strength times its tensile stress area. Torque then follows the ISO 16047 / VDI 2230 formula, which splits it into thread pitch, thread friction and friction under the head:
F = 70% × 640 MPa × 2362.0 mm² = 1058.2 kN
T = F × (0.16·P + 0.58·μ·d₂ + μ·Dₖₘ/2)
T = 1058.2 kN × (0.16·5.5 + 0.58·0.15·56.43 + 0.15·78.00/2) mm = 12077.4 N·m
Here d₂ is the pitch diameter and Dₖₘ the effective bearing diameter of the head (78.00 mm). Change the grade, lubrication or preload in the calculator below.
Frequently asked questions
What is the torque for an M60 8.8 bolt?
About 12077.4 N·m (8907.8 ft·lb) with dry threads, 8910.9 N·m (6572.3 ft·lb) with oiled threads and 5744.3 N·m (4236.8 ft·lb) with PTFE or moly paste, for a coarse M60×5.5 thread tightened to 70% of yield. The resulting clamp force is 1058.2 kN.
What is the torque for an M60 10.9 bolt?
About 16983.9 N·m (12526.7 ft·lb) with dry threads, 12530.9 N·m (9242.3 ft·lb) with oiled threads and 8078.0 N·m (5958.0 ft·lb) with PTFE or moly paste, for a coarse M60×5.5 thread tightened to 70% of yield. The resulting clamp force is 1488.1 kN.
What size wrench fits an M60 bolt?
A standard M60 hex head bolt or nut takes a 90 mm wrench or socket.
What drill size do I need to tap M60?
Use a 54.5 mm drill for M60×5.5 and 56 mm for M60×4.