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Bolt Torque Specifications
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.
Imperial Bolt Torque Specifications
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 Specifications
Bolt
Gr. 8.8
Diameter
lbf•ft
N•m
M3
0.4
0.5
M4
2.2
M6
7
10
M8
18
25
M10
37
50
M12
66
90
M16
166
225
M20
321
435
M30
1,103
1 495
M36
1,917
2 600
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
lbf•ft
N•m
1.3
1.8
3
3.3
4.5
11
15
26
35
52
70
92
125
229
310
450
610
1,550
2 100
2,700
3 675
N•m
17
36
63
100
155
220
305
540
880
1320
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