Bolt tightening torque calculator
Bolt size
M5
M6
M8
M10
M12
M14
M16
M18
M20
M22
M24
M27
M30
Property class
8.8
10.9
12.9
Size
8.8
10.9
12.9
M5
5.9
8.6
10
M6
10
15
18
M8
25
36
43
M10
49
72
84
M12
86
125
145
M14
135
200
235
M16
210
310
365
M18
290
405
485
M20
410
580
690
M22
550
780
930
M24
710
1000
1200
M27
1050
1500
1800
M30
1450
2000
2400
Tightening torque
86
Nm
M12 · 8.8
Guide values at μ≈0.14 (lightly oiled). Dry threads need more, heavily lubricated less torque.
Calculator by
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