8 Reference
8.1 Torque Specifications
The f ollo wing tables prov ide the correct torque valu es for various bolts, cap screws, and hydraulic fitting s .
• Tighten all bolts to the torque values specified in the charts (unless otherwise noted throughout this manual).
• Replace hardware with the same strength and grade of bolt.
• Use the 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.
8.1.1 SAE Bolt Torque Specifications
Torque val
ues shown in the following tables are valid for non-greased, or non-oiled threads and heads; therefore,
do NOT grea
se or oil bolts or cap screws unless otherwise specified in this manual.
Table 8.1
SAE Grade 5 Bolt and Grade 5 Free
Spinning
Nut
Torque (ft·lbf)
(*in·lbf)
Torque (N·m)
Nominal
Size (A)
Min. Max. Min. Max.
1/4-20 *106 *117
11.9 13.2
5/16-1
8
*218 *241
24.6 27.1
3/8-16
32 36 44 48
7/16-14
52
57
70
77
1/2-
13
79 87 106 118
9/16-12
114 126 153 170
5/8-11
157 173 212 234
3/
4-10
281 311 380 420
7/8-9
449 496 606 669
1-
8
61
1
67
6
82
5
91
2
Figure 8.1: Bolt Grades
A-NominalSize B-SAE-8
C - SAE-5 D - SAE-2
147695 433 Revision A
To Next Page
Loading...
