Reference
Hardee by EVH
48 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 49
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 49 for Torque Specifications for Fine Threads and Head Markings
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