STANDARD BOLT TORQUE SPECIFICATIONS
B-3
SPECIFIED TORQUE FOR STANDARD BOLTS
Class
Diameter
mm
Pitch
mm
Specified torque
Hexagon head bolt
Hexagon flange bolt
kg-cm
ft-lb
N•m
kg-cm
ft-lb
N•m
6
1
55
48 in.-lb
5.4
60
52 in.-lb
5.9
8
1.25
1 30
9
1 3
1 45
1 0
1 4
1 0
1.25
260
1 9
25
290
21
28
4T
1 2
1.25
480
35
47
540
39
53
1 4
1.5
760
55
75
850
61
83
1 6
1.5
1,150
83
113
—
6
1
65
56 in.-lb
6.4
—
8
1.25
1 60
1 2
1 6
—
1 0
1.25
330
24
32
5T
1 2
1.25
600
43
59
—
1 4
1.5
930
67
91
1 6
1.5
1,400
1 01
1 37
—
6
1
80
69 in.-lb
7.8
90
78 in.-lb
8.8
6T
8
1 0
1.25
1.25
1 95
400
1 4
29
1 9
39
215
440
1 6 ,
32
21
43
1 2
1.25
730
53
72
810
59
79
1 4
1.5
1,250
90
1 23
6
1
110
8
11
1 20
9
1 2
8
1.25
260
1 9
25
290
21
28
1 0
1.25
530
38
52
590
43
58
7T
1 2
1.25
970
70
95
1,050
76
1 03
1 4
1.5
1,500
1 08
1 47
1,700
1 23
1 67
1 6
1,5
2,300
1 66
226