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Technical
U-Bolt Torque Table
Technical Articles
More details available at each link
Measuring a Leaf Spring
There are six important factors to look
at in order to identify a leaf spring...
U-Bolt Torque Table
Cold-Formed U-Bolts which have been
torqued to a set preload are recommended to be re-torqued after a short
time to take up the stretch in the set of the material....
Recommended U-Bolt Torque for Cold-Formed U-Bolts
Cold-Formed U-Bolts which have been torqued to a set preload are recommended to be re-torqued after a short time to take up the stretch in the set of the material.
U-Bolts that have been well lubricated with an anti-seize compound will have a torque range between plated and unplated values. All the below values are general guidelines.
The OEM Service Manual on specific models always takes precedence over values shown.
| Size | Material Grade | Max. Torque Ft. Lbs. Plated | Max. Torque Ft. Lbs. Unplated |
| 3/8 - 24 | 5 | 21 | 26 |
| 7/16 - 20 | 5 | 33 | 44 |
| 1/2 - 20 | 5 | 52 | 70 |
| 9/16 - 18 | 5 | 75 | 100 |
| 5/8 - 18 | 8 | 132 | 177 |
| 3/4 - 16 | 8 | 234 | 313 |
| 7/8 - 14 | 8 | 375 | 500 |
| 1 - 14 | 8 | 758 | 1010 |
| 1-1/8 - 12 | 8 | 848 | 1131 |
| 1-1/4 - 12 | 8 | 1163 | 1551 |
