Table 4.3 SAE Grade 5 Bolt and Grade F Distorted
Thread Nut
Torque (ft·lbf)
(*in·lbf)
Torque (N·m)
Nominal
Size (A)
Min.
Max.
Min.
Max.
1/4-20
*72
*80
8.1
9
5/16-18
*149
*164
16.7
18.5
3/8-16
22
24
30
33
7/16-14
35
39
48
53
1/2-13
54
59
73
80
9/16-12
77
86
105
116
5/8-11
107
118
144
160
3/4-10
192
212
259
286
7/8-9
306
338
413
456
1-8
459
507
619
684
Figure 4.7: Bolt Grades
A - Nominal Size
B - SAE-8
C - SAE-5
D - SAE-2
Table 4.4 SAE Grade 8 Bolt and Grade G Distorted
Thread Nut
Torque (ft·lbf)
(*in·lbf)
Torque (N·m)
Nominal
Size (A)
Min.
Max.
Min.
Max.
1/4-20
*150
*165
16.8
18.6
5/16-18
18
19
24
26
3/8-16
31
34
42
46
7/16-14
50
55
67
74
1/2-13
76
84
102
113
9/16-12
109
121
148
163
5/8-11
151
167
204
225
3/4-10
268
296
362
400
7/8-9
432
477
583
644
1-8
647
716
874
966
Figure 4.8: Bolt Grades
A - Nominal Size
B - SAE-8
C - SAE-5
D - SAE-2
169820
108
Revision A
