Thread
Hand-tightening
Machine-tightening
8.8 M
A
(Nm) 10.9 M
A
(Nm)
8.8 M
A
(Nm)
10.9 M
A
(Nm)
M20 x 1.5
390
550
350
520
M22
480
680
450
650
M22 x 1.5
520
730
490
700
M24
600
850
570
810
M24 x 1.5
680
950
640
900
M24 x 2
660
900
620
850
M27
900
1250
850
1175
M27 x 2
960
1350
900
1275
M30
1200
1700
1100
1600
M30 x 2
1350
1900
1250
1800
M
A
= tightening torques
Tightening torques for studs
Thread
screwed into
Steel M
A
(Nm)
Gray cast iron M
A
(Nm)
AI alloy M
A
(Nm)
M6
9
6
6
M8
11
9
10
M10
17
13
13
M12
27
23
18
M14
37
33
33
M16
55
45
–
M
A
= tightening torques
Tightening torques for setscrews and nuts made of stainless steel
The values in the table are based on a friction coefficient µtot = 0.12, lubricated with Molykote on the thread
and under the screw head.
Basic size
Strength class
Material
70
80
M
A
(Nm)
M
A
(Nm)
M5
3.7
4.9
A2 / A4
M6
6.4
8.5
A2 / A4
M8
15.3
20.4
A2 / A4
M10
31
41
A2 / A4
M12
52
70
A2 / A4
M16
126
167
A2 / A4
M20
254
326
A2 / A4
M
A
= tightening torques
40 | General Information | MS15034/00E 2018-08
TIM-ID: 0000002333 - 018
Summary of Contents for 8V4000M*3 series
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