Appendix
Standard tightening torques
Thread
diam‐
eter
Quality class 8.8
Quality class 10.9
M20
320 Nm
236 ft-lb
358 Nm
264 ft-lb
470 Nm
347 ft-lb
525 Nm
387 ft-lb
M24
550 Nm
406 ft-lb
-
800 Nm
590 ft-lb
-
M30
1100 Nm
811 ft-lb
-
1600 Nm
1,180 ft-lb
-
Tab. 50: Standard torques for hexagonal / socket / flange screws and hexagonal / flange nuts,
with coating without lubricant
8.4.4 Standard torques for internal drive pipe plug with conical thread
Fig. 127: Internal drive pipe plug with conical thread DIN 906
Information
Tolerances of the indicated tightening torques: 10%.
Always lubricate the thread before tightening these parts (engine oil).
Thread
Tightening torque
Thread
Tightening torque
Thread
Tightening torque
M 6 x 1
5 Nm
4 ft-lb
1)
M 14 x 1.5
57 Nm
42 ft-lb
M 20 x 1.5
98 Nm
72 ft-lb
M 8 x 1
12 Nm
9 ft-lb
M 16 x 1.5
68 Nm
50 ft-lb
M 36 x 1.5
280 Nm
207 ft-lb
M 10 x 1
18 Nm
13 ft-lb
M 18 x 1.5
87 Nm
64 ft-lb
M 48 x 1.5
280 Nm
207 ft-lb
M 12 x 1.5
30 Nm
22 ft-lb
-
-
-
-
Tab. 51: Standard torques for internal drive pipe plug with conical thread
1)
Special tolerance: +0.5 mm (0.02 in)
8.4.5 Standard torques for screws according to DIN 7643, DIN 910, DIN
908
With copper sealing ring according to DIN 7603, for:
– Hollow screw for ring-type banjos according to DIN 7643
– Hexagon head screw plugs with collar - Cylindrical thread according to DIN 910
– Internal drive screw plugs with collar - Cylindrical thread according to DIN 908
188
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