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2-12 PERIODIC MAINTENANCE
Torque and Locking Agent
The table below, relating tightening torque to thread diameter, lists the basic torque for the bolts and
nuts. Use this table for only the bolts and nuts which do not require a specific torque value. All of the
values are for use with dry solvent-cleaned threads.
Basic Torque for General Fasteners
Torque
Threads Diameter
(mm)
N·m kgf·m ft·lb
5 3.4 ∼ 4.9 0.35 ∼ 0.50 30 ∼ 43 in·lb
6 5.9 ∼ 7.8 0.60 ∼ 0.80 52 ∼ 69 in·lb
8 14 ∼ 19 1.4 ∼ 1.9 10 ∼ 13.5
10 25 ∼ 34 2.6 ∼ 3.5 19 ∼ 25
12 44 ∼ 61 4.5 ∼ 6.2 33 ∼ 45
14 73 ∼ 98 7.4 ∼ 10.0 54 ∼ 72
16 115 ∼ 155 11.5 ∼ 16.0 83 ∼ 115
18 165 ∼ 225 17.0 ∼ 23.0 125 ∼ 165
20 225 ∼ 325 23.0 ∼ 33.0 165 ∼ 240
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