Maintenance Manual of 4M11 Series Diesel Engine For Land Power Generators
Appendix D Recommended Torques for Other Standard Bolts
Friction
coefficient
Strength grade
Bolt specification
M4
M5
M6
M8
M10
M12
M14
M16
M18
M20
M22
M24
M27
M30
M8×1
M10×1.25
M12×1.25
M12×1.5
M14×1.5
M16×1.5
M18×1.5
M20×1.5
M22×1.5
M24×1.5
M27×1.5
M30×1.5
0.125(galvanization)
6.9
8.8
10.9
Recommended torque N·m
2.3
2.7
3.8
4.7
5.5
8.0
8.0
9.5
13.0
19
23
32
39
46
64
67
80
110
105
125
180
165
195
275
225
270
390
325
385
540
435
510
720
560
660
930
830
980
1400 1650 890
1100 1350 1850 2250 1200 1450 2000 2400
21
25
35
41
49
66
74
88
125
70
83
115
115
140
195
175
210
295
255
305
425
360
425
600
480
570
800
610
720
1000 1200 650
890
1050 1500 1800 970
1250 1450 2050 2500 1350 1600 2250 2700
115
0.14(shining)
12.9
6.9
8.8
4.6
2.4
2.9
9.5
5.0
6.0
16.0
8.5
10
39
21
25
77
41
49
135
72
86
215
115
135
330
180
210
455
245
290
650
345
410
870
465
550
1100 600
710
1050 1500 1800
42
23
27
82
44
52
150
80
95
140
76
90
235
125
150
350
190
225
510
275
325
720
385
460
960
520
610
780
1150 1600 1950
10.9
12.9
4.1
4.9
8.5
10
14.0
17
35
41
69
83
120
145
190
230
295
355
405
485
580
690
780
930
1000 1200
38
45
73
88
135
155
125
150
210
250
315
380
460
550
640
770
860
1050
1100 1300
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