Torque Specs on SAE Grade 5 Bolts
Bolt Size |
TPI |
Proof Load (lbs) 1
|
Clamp Load (lbs) 2
|
Tightening Torque (ft lbs) |
Galv+Waxed |
Galv |
Plain |
1⁄4
|
20 |
2,700 |
2,025 |
4 |
11 |
8 |
5⁄16
|
18 |
4,450 |
3,338 |
9 |
22 |
17 |
3⁄8
|
16 |
6,600 |
4,950 |
15 |
39 |
31 |
7⁄16
|
14 |
9,050 |
6,788 |
25 |
62 |
49 |
1⁄2
|
13 |
12,050 |
9,038 |
38 |
94 |
75 |
9⁄16
|
12 |
15,450 |
11,588 |
54 |
136 |
109 |
5⁄8
|
11 |
19,200 |
14,400 |
75 |
188 |
150 |
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