55
7.2 BOLT TORQUE
CHECKING BOLT TORQUE
The tables shown below give correct torque values for various bolts and capscrews. Tighten all bolts to
the torques specified in chart unless otherwise noted. Check tightness of bolts periodically, using bolt
torque chart as a guide. Replace hardware with the same strength bolt.
ENGLISH TORQUE SPECIFICATIONS
Bolt
Diameter
"A"
Bolt Torque*
SAE 2
(N.m) (lb-ft)
SAE
(N.m) (lb-ft)
SAE
(N.m) (lb-ft)
1/4"
5/16"
3/8"
7/16"
1/2"
9/16"
5/8"
3/4"
7/8"
1"
8
6
13
10
27
20
41
30
61
45
95
60
128
95
225
165
230
170
345
225
12
9
25
19
45
33
72
53
110
80
155
115
215
160
390
290
570
420
850
630
17
12
36
27
63
45
100
75
155
115
220
165
305
220
540
400
880
650
1320
970
V
METRIC TORQUE SPECIFICATIONS
Torque figures indicated above are valid for non-greased or non-oiled threads and heads unless oth-
erwise specified. Therefore, do not grease or oil bolts or capscrews unless otherwise specified in this
manual. When using locking elements, increase torque values by 5%.
* Torque value for bolts and capscrews are identified by their head markings.
Bolt
Diameter
"A"
Bolt Torque*
.
(N.m) (lb-ft)
0.9
(N.m) (lb-ft)
M3
M4
M5
M6
M8
M10
M12
M14
M16
M20
M24
M30
M36
.5
.4
3
2.2
6
4
10
7
25
18
50
37
90
66
140
103
225
166
435
321
750
553
1495
1103
2600
1917
1.8
1.3
4.5
3.3
9
7
15
11
35
26
70
52
125
92
200
148
310
229
610
450
1050
774
2100
1550
3675
2710