87
B58FC1 0000000094 EN 002
TECHNICAL SPECIFICATIONS
11.3
Tightening torque for screws
Make sure that the threads are clean! The specified tightening torques are valid for screws and
threads that are clean, dry and free of grease.
Tightening torque for screws
Thread
Strength category
8.8
10.9
12.9
Nm
lb-ft
Nm
lb-ft
Nm
lb-ft
M4
3
2
4.5
3
5
4
M6
11
8
15
11
17
13
M8
27
20
36
27
42
31
M8x1
29
21
38
28
45
33
M10
54
40
71
52
83
61
M10x1.25
57
42
75
55
87
64
M12
93
69
123
91
144
106
M12x1.5
97
72
128
94
150
111
M12x1.25
101
74
133
98
155
114
M14
148
109
195
144
229
169
M14x1.5
159
117
209
154
244
180
M16
230
170
302
223
354
261
M16x1.5
244
180
320
236
374
276
M18
329
243
421
311
492
363
M18x2
348
257
443
327
519
383
M18x1.5
368
271
465
343
544
401
M20
464
342
592
437
692
510
M20x2
488
360
619
457
724
534
M20x1.5
511
377
646
476
756
558
M22
634
468
807
595
945
697
M22x2
663
489
840
620
984
726
M22x1.5
692
510
873
644
1022
754
M24
798
589
1017
750
1190
878
M24x2
865
638
1095
808
1282
946
M27
1176
867
1496
1103
1750
1291
M27x2
1262
931
1594
1176
1866
1376
M30
1597
1178
2033
1499
2380
1755
M30x2
1756
1295
2216
1634
2594
1913
5/8“ UNC (normal)
230
170
302
223
5/8“ UNF (fine)
244
180
320
236
3/4" UNC (normal)
464
342
592
437
3/4" UNF (fine)
511
377
646
476