Classic Cycles Technical Resources
87
BOLT TORQUE
The following table lists nominal tightening torque for various metric thread sizes:
BOLT TIGHTENING TORQUES
Diameter
(Millimeters)
Pitch
(Millimeters)
Torque
Foot-pounds (Meter-kilograms)
Coarse thread
5 0.90 2.53 - 3.47 (0.35 - 0.48)
6 1.00 4.56 - 6.37 (0.63 - 0.88)
8 1.25 11.6 - 15.9 (1.6 - 2.2)
10 1.50 22.4 - 30.4 (3.1 - 4.2)
12 1.75 39.1 - 54.2 (5.4 - 7.5)
14 2.00 60.0 - 83.2 (8.3 - 11.5)
16 2.00 94.0 - 130 (13 - 18)
18 2.50 130 - 181 (18 - 25)
20 2.50 188 - 253 (26 - 35)
Fine thread
5 0.50 2.53 - 3.47 (0.35 - 0.48)
6 0.75 3.98 - 5.57 (0.55 - 0.77)
8 1.00 9.76 - 13.4 (1.35 - 1.85)
10 1.25 18.4 - 25.3 (2.55 - 3.5)
12 1.50 32.5 - 44.8 (4.5 - 6.2)
14 1.50 53.5 - 73.8 (7.4 - 10.2)
16 1.50 83.2 - 116 (11.5 - 16)
18 1.50 123 - 166 (17 - 23)
20 1.50 166 - 239 (23 - 33)
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