Page 10
AC20021
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.
BoLt 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 assembly of equipment.
toRque speCIFICAtIon
*5$'(
&/$66
&/$66
*5$'(
*5$'(
&/$66
$
Bolt torque for standard bolts *
“A”
GRAde 2
GRAde 5
GRAde 8
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)
Bolt torque for metric bolts *
“A”
CLAss 8.8
CLAss 9.8
CLAss 10.9
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
Summary of Contents for RMLE
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