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Section 7
Reference
Bolt Torque
Checking Bolt Torque
The tables shown below give correct torque
values for various bolts and capscrews.
Tighten all bolts to the torque specified in the
chart unless otherwise noted. Check
tightness of bolts periodically, using bolt
torque chart as a guide. Replace hardware
with the same strength bolt. Torque figures
indicated 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 Specifications for Coarse Threads
Diameter
"A"
1/4" - 20
5/16" - 18
3/8" - 16
7/16" - 14
1/2" - 13
9/16" - 12
5/8" - 11
3/4" - 10
7/8" - 9
1" - 8
1 1/8" - 7
1 1/4" - 7
1 3/8" - 6
1 1/2" - 6
See page 22 for Torque Specifications for Fine Threads and Head Markings
Bolt Torque
SAE-2
LB-FT
N.m
6
8
10
13
20
27
30
41
45
61
70
95
95
128
165
225
170
230
345
225
354
478
500
675
655
884
870
1175
NOTE: Bolt Torques shown are maximum
allowable values for ultimate safe working
strength or external load-carrying capacity.
The bolt torque are not applicable in cases
where bolts are used as a pin-like device,
holding together two or more movable
objects and keeping them from spreading
apart. – "Clamping Torque" Being dependent
upon the application of the bolt. -
Torque value for bolts and cap screws are
identified by their head markings.
See Page 22.
Coarse Thread
SAE-5
N.m
LB-FT
12
9
25
19
45
33
72
53
110
80
155
115
215
160
390
290
570
420
850
630
1072
794
1512
1120
1985
1470
2632
1950
21
Hardee by EVH
SAE-8
LB-FT
N.m
12
17
27
36
45
63
75
100
115
155
165
220
220
305
400
540
650
880
970
1320
1287
1737
1875
2531
2382
3216
3161
4267
Revised 8/26/15
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