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U-Bolt Torque Guide
U-Bolts that have ben torqued to a set preload are recommended to be re-torqued after a short time to take up the stretch in the material.
U-Bolts that have been well lubricated with an anti-seize compound will have a torque range between plated and un-plated values.
All of the below values are general guidelines. The OEM Service Manual on specific models always takes precedence over the values shown.
| Size | Material Grade | Max. Torque Ft.-Lbs. Plated | Max. Torque Ft.-Lbs. Un-plated |
| 3/8 - 24 | 5 | 21 | 36 |
| 7/16 - 20 | 5 | 33 | 44 |
| 1/2 - 20 1/2 - 20 |
5 8 |
52 64 |
70 87 |
| 9/16 - 18 9/16 - 18 |
5 8 |
75 93 |
100 124 |
| 5/8 -18 5/8 -18 |
5 8 |
107 143 |
132 177 |
| 3/4 - 16 3/4 - 16 |
5 8 |
190 253 |
234 313 |
| 7/8 - 14 7/8 - 14 |
5 8 |
304 405 |
375 500 |
| 1 - 14 | 8 | 758 | 1010 |
| 1 1/8 - 12 | 8 | 848 | 1131 |
| 1 1/4 - 12 | 8 | 1163 | 1151 |
U-Bolts must be tightened and torqued using a cross pattern sequence.
Tighten #1 then #4 to partial toque, then partial torque #2 and #3.
Using the same sequence, fully torque U-Bolt Nots.
DO NOT RE-USE U-BOLTS.