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BOLT TORQUE
TORQUE DATA FOR STANDARD NUTS, BOLTS, AND CAP SCREWS.
Tighten all bolts to torques specifi ed in chart unless otherwise noted. Check tightness of bolts periodically, using bolt
chart as guide. Replace hardware with same grade bolt.
NOTE: Unless otherwise specifi ed, high-strength Grade 5 hex bolts are used throughout assembly of equipment.
Torque Specifi cations
Torque fi gures indicated are valid for non-greased
or non-oiled threads and heads unless otherwise
specfied. Therefore, do not grease or oil bolts
or capscrews unless otherwise specifi ed in this
manual. When using locking
elements, increase torque values
by 5%.
* GRADE or CLASS value for bolts and capscrews
are identifi ed by their head markings.
Bolt Torque for Standard bolts *
GRADE 2
"A"
lb-ft
(N.m)
1/4"
6
(8)
5/16"
10
(13)
3/8"
20
(27)
7/16"
30
(40)
1/2"
45
(60)
9/16"
70
(95)
5/8"
95
(130)
3/4"
165
(225)
7/8"
170
(230)
1"
225
(300)
Bolt Torque for Metric bolts *
CLASS 8.8
"A"
lb-ft
(N.m)
6
9
(13)
7
15
(21)
8
23
(31)
10
45
(61)
12
78
(106)
14
125
(169)
16
194
(263)
18
268
(363)
20
378
(513)
22
516
(699)
24
654
(886)
GRADE-2 GRADE-5
CLASS 8.8 CLASS 9.8 CLASS 10.9
8.8
9.8
Page # 12
GRADE 5
GRADE 8
lb-ft
(N.m)
lb-ft
9
(12)
12
18
(25)
25
30
(40)
45
50
(70)
80
75
(100)
115
115
(155)
165
150
(200)
225
290
(390)
400
420
(570)
650
630
(850)
970
CLASS 9.8
CLASS 10.9
lb-ft
(N.m)
lb-ft
10
(14)
13
18
(24)
21
25
(34)
31
50
(68)
61
88
(118)
106
140
(189)
170
216
(293)
263
--
--
364
--
--
515
--
--
702
--
--
890
GRADE-8
10.9
(N.m)
(16)
(35)
(60)
(110)
(155)
(220)
(300)
(540)
(880)
(1310)
(N.m)
(17)
(29)
(42)
(83)
(144)
(230)
(357)
(493)
(689)
(952)
(1206)
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