GENERAL ± Standard Part/Tightening-Torque Table
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STANDARD PART/TIGHTENING-TORQUE TABLE
Each torque value in the table is a standard value
for tightening under the following conditions.
(1) Bolts, nuts and washers are all made of steel
and plated with zinc.
(2) The threads and bearing surface of bolts and
nuts are all in dry condition.
The values in the table are not applicable:
(1) If toothed washers are inserted.
(2) If plastic parts are fastened.
(3) If bolts are tightened to plastic or die-cast
inserted nuts.
(4) If self-tapping screws or self-locking nuts are
used.
Standard bolt and nut tightening torque
Thread size Torque Nm
Bolt nominal
diameter (mm)
Pitch (mm) Head mark ª4º Head mark ª7º Head mark ª8º
M5 0.8 2.5 4.9 5.9
M6 1.0 4.9 8.8 9.8
M8 1.25 12 22 25
M10 1.25 24 44 52
M12 1.25 41 81 96
M14 1.5 72 137 157
M16 1.5 111 206 235
M18 1.5 167 304 343
M20 1.5 226 412 481
M22 1.5 304 559 647
M24 1.5 392 735 853
Flange bolt and nut tightening torque
Thread size Torque Nm
Bolt nominal
diameter (mm)
Pitch (mm) Head mark ª4º Head mark ª7º Head mark ª8º
M6 1.0 4.9 9.8 12
M8 1.25 13 24 28
M10 1.25 26 49 57
M10 1.5 24 44 54
M12 1.25 46 93 103
M12 1.75 42 81 96
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