6 Reference
6.1 Torque Specifications
The following tables provide correct torque values for various bolts, cap screws, and hydraulic fittings.
• Tighten all bolts to torque values specified in charts (unless otherwise noted throughout this manual).
• Replace hardware with same strength and grade of bolt.
• Use torque value tables as a guide and periodically check tightness of bolts.
• Understand torque categories for bolts and cap screws by using their identifying head markings.
6.1.1 SAE Bolt Torque Specifications
Torque va
lues shown in following tables are valid for non-greased, or non-oiled threads and heads; therefore, do
NOT greas
e or oil bolts or cap screws unless otherwise specifie d in this manual.
Table 6.1
SAE Grade 5 Bolt and Grade 5 Free
Spinning
Nut
Torque (N·m)
To rque (ft·lbf)
(*in·lbf)
Nominal
Size (A)
Min. Max. Min. Max.
1/4-20
11 .9 13.2
*106 *117
5/16-1
8
24.6 27.1
*218 *241
3/8-16
44 48 32 36
7/16-14
70
77
52
57
1/2-1
3
106 118 79 87
9/16-12
153 170 114 1 26
5/8-11
212 234 157 173
3/4
-10
380 420 281 311
7/8-9
606 669 449 496
1-
8
82
5
91
2
61
1
67
6
Figure 6.1: Bolt Grades
A-NominalSize B-SAE-8
C - SAE-5 D - SAE-2
147962 357 Revision A
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