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Common Bolt Torque values
Checking Bolt Torque
The tables shown give correct torque values for various
bolts and capscrews. Tighten all bolts to the torque
values specified in the table, unless indicated otherwise.
Check tightness of bolts periodically.
IMPORTANT! If replacing hardware, use fasteners of
the same grade.
IMPORTANT! Torque figures indicated in the table are
for non-greased or non-oiled threads. Do not grease or
oil threads unless indicated otherwise. When using a
thread locker, increase torque values by 5%.
NOTE:
Bolt grades are identified by their head
markings.
PT302
Imperial Bolt Torque Specifi cations
Bolt
SAE Gr. 2
Diameter
lbf•ft
N•m
1/4"
6
8
5/16"
10
13
3/8"
20
27
7/16"
30
41
1/2"
45
61
9/16"
60
95
5/8"
95
128
3/4"
165
225
7/8"
170
230
1"
225
345
Metric Bolt Torque Specifi cations
Bolt
Gr. 8.8
Diameter
lbf•ft
M3
0.4
M4
2.2
M6
7
M8
18
M10
37
M12
66
M14
83
M16
166
M20
321
M30
1,103
8
Torque Value
SAE Gr. 5
SAE Gr. 8
lbf•ft
N•m
lbf•ft
9
12
12
19
25
27
33
45
45
53
72
75
80
110
115
115
155
165
160
215
220
290
390
400
420
570
650
630
850
970
Torque Value
Gr. 10.9
N•m
lbf•ft
0.5
1.3
3
3.3
10
11
25
26
50
52
90
92
112
116
225
229
435
450
1 495
1,550
N•m
17
36
63
100
155
220
305
540
880
1320
N•m
1.8
4.5
15
35
70
125
158
310
610
2 100
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