15
Revised 8/26/15
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%.
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 16
Torque Specifications for Coarse Threads
Bolt Torque Coarse Thread
N.m
LB-FT
LB-FT
N.m
8
9
12
17
13
19
27
36
27
33
45
63
41
53
75
100
61
80
115
155
95
115
165
220
128
160
220
305
225
290
400
540
230
420
650
880
345
630
970
1320
478
794
1287
1737
675
1120
1875
2531
884
1470
2382
3216
1175
1950
3161
4267
500
655
870
354
1072
1512
1985
2632
1” - 8
225
850
1 1/8" - 7
1 1/4" - 7
1 3/8" - 6
1 1/2" - 6
3/4” - 10
165
390
7/8” - 9
170
570
9/16” - 12
70
155
5/8” - 11
95
215
7/16” - 14
30
72
1/2” - 13
45
110
5/16” - 18
10
25
3/8” - 16
20
45
“A”
LB-FT
N.m
1/4” - 20
6
12
Diameter
SAE-2
SAE-5
SAE-8
See page 20 for
Torque Specifications
for
Fine Threads
and
Head Markings
