What is the Torque Spec for a 5/16 Inch U-Bolt

Question

Question:

what should I torque the u bolts holding slipper springs to axle. the axle is rated 2200lbs. The springs are 1 3/4inch the u bolts are 5/16inch diameter.

asked by: Mike

1

Helpful Expert Reply:

The torque spec for a 5/16" diameter u-bolt is 65 ft lbs. If you do not already have a torque wrench we have the Powerbuilt Dual Drive Torque Wrench part # ALL944001 which contains both a 3/8" and 1/2" drive.

expert reply by: Conner L

1

Answer 1

Well shackle length is mainly based on the height difference between the front and rear hangers. The rear hanger normally doesn't hang as low as the front so that the shackle can offset the difference and add the ability to move. What is the…

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Answer 2

The closest leaf spring set we have available to the 22-1/4 inch length you mentioned is the 3-Leaf Double-Eye Spring #SP-113275. This double-eye leaf spring features a length of 23-1/2 inches from the center of the spring eye to the center of the…

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Answer 3

If the U-bolts are 9/16 inch diameter, the torque specs should be between 65 to 95 foot lbs. If the U-bolts are 3/8 inch diameter, the torque should be between 30 and 50 foot lbs.

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Answer 4

For 3/8 inch diameter trailer suspension u-bolts you will want to torque the nuts to 30 to 50 foot pounds according to Dexter Axle. If you need a torque wrench we have #ALL944001 good for 10 to 150 foot pounds.

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Answer 5

Torque specs for wheel lug nuts will vary depending on the diameter of the lugs, type of lug nut and the wheel's material. The linked chart details the recommended torque for many combinations. Dexter Hub/Drum #84546UC3 has 1/2-inch studs and…

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Answer 6

The Powerbuilt Beam-Type Torque Wrench #ALL644044 is a great, cost-effective solution for using a torque wrench without dumping a lot of money into it. These are most old-school but still reliable. If the needle doesn't point at zero when the…

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Answer 7

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 8

Hey James, you can go with a 4k axle leaf spring like the part #e22YR in place of what you have now while it has a slightly higher weight capacity it's not enough that it would create a harsh ride quality. This is a 26 inch long spring though so…

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Answer 9

You can use leaf springs that are rated higher than the axle without any issues as long as they measure the correct measurement for your trailer. For example the 6-leaf double eye spring for 7,000 lb axles part #e64SR measures 24-7/8" eye to…

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Answer 10

The determine the correct replacement leaf spring on your 2021 Coachmen 259FKDS you'll need to lift your trailer frame so the spring is hanging freely and then measure from center-eye to center-eye, then for the equalizer you need to measure…

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Answer 11

Hey Thomas, the most important factors for picking out a replacement leaf spring for a trailer are matching axle capacity and length. Getting the same amount of leaves in the spring pack is actually not a huge priority so I wouldn't worry too…

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Answer 12

Hello Mark, thanks for reaching out. When replacing leaf springs, it is important the new springs are identical in length to the old ones. There is a small amount of tolerance, like 1/2" or less, but any more than this can throw the suspension…

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What is the Torque Spec for a 5/16 Inch U-Bolt

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