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 torque for stress bolt connections as per MTN 5007 standard
The standard applies to stress pin bolts and stress bolts which are subjected to static and dynamic load
of strength class 10.9 as well as to the associated nuts.
Shaft and transition dimensions as per MMN 209 standard and material and machining as per
MMN 389 standard (bright surface or phosphatized).
The values in the table are based on a friction coefficient µtot = 0.125.
Coat thread and mating faces of screws and nuts with engine oil prior to assembly.
An assembly tolerance of +10% of the table values is admissible for unavoidable deviations during the
tightening process.
The values in the tables are for manual tightening using a torque wrench.
Thread
Not torsion-protected M
A
(Nm)
Torsion-protected M
A
(Nm)
M6
9
12
M8
21
28
M8 x 1
24
30
M10
42
55
M10 x 1.25
46
60
M12
75
93
M12 x 1.5
78
99
M14
120
150
M14 x 1.5
135
160
M16
180
225
M16 x 1.5
200
245
M18
250
315
M18 x 1.5
300
360
M20
350
450
M20 x 1.5
430
495
M22
500
620
M22 x 1.5
560
675
M24
640
790
16 | General Information | MS150119/00E 2014-08
TIM-ID: 0000002333 - 016
