Page # 13
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.
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)
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.
Torque Specifi cations
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 *
GRADE-2 GRADE-5 GRADE-8
CLASS 8.8 CLASS 9.8 CLASS 10.9
8.8
10.9
9.8
BOLT TORQUE
