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9.
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
SAE 2
"A"
N.m
(lb-ft)
(6)
1/4"
8
(10)
5/16"
13
(20)
3/8"
27
(30)
7/16"
41
(45)
1/2"
61
(70)
9/16"
95
(95)
5/8"
128
(165)
3/4"
225
(170)
7/8"
230
(225)
1"
345
METRIC TORQUE SPECIFICATIONS
Bolt Torque*
Bolt
Diameter
.
"A"
(N.m)
(lb-ft)
M3
.5
3
M4
6
M5
M6
10
M8
25
50
M10
M12
90
M14
140
225
M16
M20
435
M24
750
1495
M30
2600
M36
Torque figures indicated above are valid for non-greased or non-oiled threads and heads unless otherwise
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 Torque *
SAE 5
SAE 8
N.m
(lb-ft)
N.m
12
(9)
17
25
(19)
36
45
(33)
63
72
(53)
100
110
(80)
155
155
(115)
220
215
(160)
305
390
(290)
540
570
(420)
880
850
(630)
1320
0.9
(N.m)
(lb-ft)
.4
1.8
1.3
2.2
4.5
3.3
4
9
7
7
15
11
18
35
26
37
70
52
66
125
92
103
200
148
166
310
229
321
610
450
553
1050
774
1103
2100
1550
1917
3675
2710
(lb-ft)
(12)
(27)
(45)
(75)
(115)
(165)
(220)
(400)
(650)
(970)
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