GENERAL
169558
Revision
D
5
RECOMMENDED TORQUES
A. GENERAL
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 throughout
this manual).
•
Check tightness of bolts periodically, using
bolt torque chart as a guide.
•
Replace hardware with the same strength
bolt.
•
Torque figures are valid for non-greased or
non-oiled threads and heads unless
otherwise specified. Do
NOT
grease or oil
bolts or capscrews unless specified in this
manual.
•
Torque categories for bolts and capscrews
are identified by their head markings.
B. SAE BOLTS
SAE Grade 5 Bolt and Grade 5 Free Spinning
Nut
Nominal
Size
Torque (ft·lbf)
(*in·lbf)
Torque (N·m)
Min. Max. Min. Max.
1/4-20 *106 *117 11.9
13.2
5/16-18 *218 *241 24.6 27.1
3/8-16
32 36 44 48
7/16-14
52 57 70 77
1/2-13 79 87 106 118
9/16-12
114 126 153 170
5/8-11 157 173 212 234
3/4-10
281 311 380 420
7/8-9 449 496 606 669
1-8 611 676 825 912
SAE Grade 5 Bolt and Grade 5 Distorted
Thread Nut
Nominal
Size
Torque (ft·lbf)
(*in·lbf)
Torque (N·m)
Min. Max. Min. Max.
1/4-20
*72
*80 8.1
9.0
5/16-18 *149 *164 16.7 18.5
3/8-16
22 24 30 33
7/16-14
35 39 48 53
1/2-13
54 59 73 80
9/16-12 77 86 105 116
5/8-11 107 118 144 160
3/4-10
192 212 259 286
7/8-9 306 338 413 456
1-8 459 507 619 684
SAE Grade 8 Bolt and Grade 8 Free Spinning
Nut
Nominal
Size
Torque (ft·lbf)
(*in·lbf)
Torque (N·m)
Min. Max. Min. Max.
1/4-20
*150
*165 16.8
18.6
5/16-18
26 28 35 38
3/8-16
46 50 61 68
7/16-14
73 81 98 109
1/2-13 111 123 150 166
9/16-12
160 177 217 239
5/8-11 221 345 299 330
3/4-10
393 435 531 587
7/8-9 633 700 855 945
1-8 863 954
1165
1288
1004096 SAE5
1004096 SAE8