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8
BOLT TORQUE
CHECKING BOLT TORQUE
The tables shown below give correct torque values for various bolts and cap screws. Tighten all
bolts to the torques specified on 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
SAE 2
Diameter
(N.m) (lb-ft)
"A"
1/4"
8
6
5/16"
13
10
3/8"
27
20
7/16"
41
30
1/2'"
61
45
9/16"
95
60
5/8"
128
95
3/4"
225
165
7/8"
230
170
1"
345
225
METRIC TORQUE SPECIFICATIONS
Bolt
8.8
Diameter
(N.m) (lb-ft)
"A"
M3
.5
M4
3
M5
6
M6
10
M8
25
M10
50
M12
90
M14
140
M16
225
M20
435
M24
750
M30
1495
M36
2600
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 cap screws unless otherwise
specified in this manual. When using locking elements, increase torque values by 5%.
* Torque value for bolts and cap screws are identified by their head markings.
Bolt Torque*
SAE 5
(N.m) (lb-ft)
(N.m) (lb-ft)
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
Bolt Torque*
10.9
(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
Chem-Veyor Operator's & Parts Manual # 34-92547-6
SAE 8
12
27
45
75
115
165
220
400
650
970
24
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