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bOLT TORQUE
TORQUE DATA FOR STANDARD NUTS, bOLTS, AND CAPSCREWS.
Tighten all bolts to torques specified in chart unless otherwise noted. Check tightness of bolts
periodically, using bolt chart as guide. Replace hardware with same grade bolt.
NOTE: Unless otherwise specified, high-strength Grade 5 hex bolts are used throughout as-
sembly of equipment.
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 capscrews unless otherwise specified in this manual.
When using locking elements, increase torque values by 5%.
* GRADE or CLASS value for bolts and capscrews are identified by their head markings.
Torque Specifications
bolt Torque for Standard bolts *
GRADE 2
GRADE 5
GRADE 8
“
A
”
lb-ft (N.m)
lb-ft (N.m)
lb-ft (N.m)
1/4
”
6
(8)
9
(12)
12 (16)
5/16
”
10 (13)
18 (25)
25 (35)
3/8
”
20 (27)
30 (40)
45 (60)
7/16
”
30 (40)
50 (70)
80 (110)
1/2
”
45 (60)
75 (100)
115 (155)
9/16
”
70 (95)
115 (155)
165 (220)
5/8
”
95 (130)
150 (200)
225 (300)
3/4
”
165 (225)
290 (390)
400 (540)
7/8
”
170 (230)
420 (570)
650 (880)
1
”
225 (300)
630 (850)
970 (1310)
CLASS 8.8
CLASS 9.8
CLASS 10.9
“
A
”
lb-ft (N.m)
lb-ft (N.m)
lb-ft (N.m)
6
9
(13)
10
(14)
13
(17)
7
15
(21)
18
(24)
21
(29)
8
23
(31)
25
(34)
31
(42)
10
45
(61)
50
(68)
61
(83)
12
78
(106)
88
(118)
106 (144)
14
125 (169)
140 (189)
170 (230)
16
194 (263)
216 (293)
263 (357)
18
268 (363)
--
--
364 (493)
20
378 (513)
--
--
515 (689)
22
516 (699)
--
--
702 (952)
24
654 (886)
--
--
890 (1206)
bolt Torque for Metric bolts *
*5$'(
&/$66
&/$66
*5$'(
*5$'(
&/$66
$
