31May
Introduction to Torque Part 4
Recommended Maximum Torque Values
The information supplied here is intended to be an acceptable guide for normal conditions. For critical applications, further information and research will be necessary. The following basic assumptions have been made:
a. Bolts are new, standard finish, uncoated and not lubricated (other than the normal protective oil film)
b. The load will be 90% of the bolt yield strength
c. The coefficient of friction is 0.14
d. The final tightening sequence is achieved smoothly and slowly
If lubrication is to be applied to the nut/bolt, multiply the recommended torque by the appropriate factor shown in the table on intro to torque part 2. Alternatively, use the Torque/Tension Calculator which enables fastener and friction conditions to be modified with ease.
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![](data:image/png;base64,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)
M
|
BOLT GRADE
|
Â
![](data:image/png;base64,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)
mm
|
3.6
|
4.6
|
5.6
|
5.8
|
6.8
|
8.8
|
9.8
|
10.9
|
12.9
|
Torque in N·m
|
M 1.6
|
0.05
|
0.07
|
0.09
|
0.11
|
0.14
|
0.18
|
0.21
|
0.26
|
0.31
|
3.2
|
M 2
|
0.11
|
0.14
|
0.18
|
0.24
|
0.28
|
0.38
|
0.42
|
0.53
|
0.63
|
4
|
M 2.5
|
0.22
|
0.29
|
0.36
|
0.48
|
0.58
|
0.78
|
0.87
|
1.09
|
1.31
|
5
|
M 3
|
0.38
|
0.51
|
0.63
|
0.84
|
1.01
|
1.35
|
1.52
|
1.9
|
2.27
|
5.5
|
M 4
|
0.71
|
0.95
|
1.19
|
1.59
|
1.91
|
2.54
|
2.86
|
3.57
|
4.29
|
7
|
M 5
|
1.71
|
2.28
|
2.85
|
3.8
|
4.56
|
6.09
|
6.85
|
8.56
|
10.3
|
8
|
M 6
|
2.94
|
3.92
|
4.91
|
6.54
|
7.85
|
10.5
|
11.8
|
14.7
|
17.7
|
10
|
M 8
|
7.11
|
9.48
|
11.9
|
15.8
|
19
|
25.3
|
28.4
|
35.5
|
42.7
|
13
|
M 10
|
14.3
|
19.1
|
23.8
|
31.8
|
38.1
|
50.8
|
57.2
|
71.5
|
85.8
|
17
|
M 12
|
24.4
|
32.6
|
40.7
|
54.3
|
65.1
|
86.9
|
97.9
|
122
|
147
|
19
|
M 14
|
39
|
52
|
65
|
86.6
|
104
|
139
|
156
|
195
|
234
|
22
|
M 16
|
59.9
|
79.9
|
99.8
|
133
|
160
|
213
|
240
|
299
|
359
|
24
|
M 18
|
82.5
|
110
|
138
|
183
|
220
|
293
|
330
|
413
|
495
|
27
|
M 20
|
117
|
156
|
195
|
260
|
312
|
416
|
468
|
585
|
702
|
30
|
M 22
|
158
|
211
|
264
|
352
|
422
|
563
|
634
|
792
|
950
|
32
|
M 24
|
202
|
270
|
337
|
449
|
539
|
719
|
809
|
1,011
|
1,213
|
36
|
M 27
|
298
|
398
|
497
|
663
|
795
|
1,060
|
1,193
|
1,491
|
1,789
|
41
|
M 30
|
405
|
540
|
675
|
900
|
1,080
|
1,440
|
1,620
|
2,025
|
2,430
|
46
|
M 33
|
550
|
734
|
917
|
1,223
|
1,467
|
1,956
|
2,201
|
2,751
|
3,301
|
50
|
M 36
|
708
|
944
|
1,180
|
1,573
|
1,888
|
2,517
|
2,832
|
3,540
|
4,248
|
55
|
M 39
|
919
|
1,226
|
1,532
|
2,043
|
2,452
|
3,269
|
3,678
|
4,597
|
5,517
|
60
|
M 42
|
1,139
|
1,518
|
1,898
|
2,530
|
3,036
|
4,049
|
4,555
|
5,693
|
6,832
|
65
|
M 45
|
1,425
|
1,900
|
2,375
|
3,167
|
3,800
|
5,067
|
5,701
|
7,126
|
8,551
|
70
|
M 48
|
1,716
|
2,288
|
2,860
|
3,813
|
4,576
|
6,101
|
6,864
|
8,580
|
10,296
|
75
|
M 52
|
2,210
|
2,947
|
3,684
|
4,912
|
5,895
|
7,859
|
8,842
|
11,052
|
13,263
|
80
|
M 56
|
2,737
|
3,650
|
4,562
|
6,083
|
7,300
|
9,733
|
10,950
|
13,687
|
16,425
|
85
|
M 60
|
3,404
|
4,538
|
5,673
|
7,564
|
9,076
|
12,102
|
13,614
|
17,018
|
20,422
|
90
|
M 64
|
4,100
|
5,466
|
6,833
|
9,110
|
10,932
|
14,576
|
16,398
|
20,498
|
24,597
|
95
|
M 68
|
4,963
|
6,617
|
8,271
|
11,029
|
13,234
|
17,646
|
19,851
|
24,814
|
29,777
|
100
|