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TORQUE DATA FOR STANDARD NUTS, BOLTS, AND CAPSCREWS.
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 specfi ed. Therefore, do not grease or
oil bolts or capscrews unless otherwise speci-
fi ed in this manual. When using locking
elements, increase torque values
by 5%.
* GRADE or CLASS value for bolts and cap-
screws are identifi ed by their head markings.
BOLT TORQUE
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
9.8
8.8
Page 9
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
CLASS 10.9
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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