Dimension Width across flats
(mm)
Screw tightening torque M
A
(Nm)
Strength class 8.8 Strength class 10.9 Strength class 12.9
M14 x 1.5 22 145 215 255
M16 x 1.5 24 225 330 390
M18 x 1.5 27 340 485 570
M20 x 1.5 30 475 680 790
M22 x 1.5 32 630 900 1050
M24 x 2 36 800 1150 1350
M27 x 2 41 1150 1650 1950
M30 x 2 46 1650 2350 2750
Tab. 14.2: General tightening torques - metric fine thread
50-020-1011-900_EN
1.0 - © 2/15/2017
283
14 Appendix
14.3 Tightening torques
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