U-Bolt Torque Recommendation for 1/2 inch Diameter On Trailer Suspension
Updated 05/14/2026 | Published 08/10/2016
Question:
Hi, trying to get a torque value for the above U-bolts Thanks
asked by: Nick
1
Helpful Expert Reply:
For 1/2 inch trailer u-bolts that attach to axle the recommended torque value is between 45 and 70 ft lbs of torque.
expert reply by:
Jameson C
1
click to enlarge
Product Page this Question was Asked From
CE Smith Replacement U-Bolt w/ Nuts for 3" Round Axles - 1/2" Diameter - Galvanized
- Trailer Suspension Parts
- U-Bolts
- Boat Trailer
- Snowmobile Trailer
- 5200 lbs - 7000 lbs
- Round Axle - 3 Inch
- 1/2 Inch Diameter
- 6-11/16 Inch Long
- CE Smith
more information >
Continue Researching
- Search Results: trombetta
- Search Results: trailer suspension parts
- Search Results: trailer leaf springs
- Search Results: trailer tires and wheels
- Shop: 4-Leaf Double-Eye Spring for 4,000-lb Trailer Axles - 26" Long
- Search Results: leaf spring shackle kit
- Search Results: road armor equalizer
- Search Results: 248744
- Video: How To Choose Camper Leaf Springs
- Shop: Trailer Hitch
- Shop: Lippert U-Bolt and Nut Kit for 2,200-lb Trailer Axles - 1-3/4" Wide
- Shop: Lippert U-Bolt and Nut Kit for 3,500-lb Trailer Axles - 2-3/8" Wide
- Shop: Lippert U-Bolt and Nut Kit for 4,400-lb Trailer Axles - 3" Wide
- Shop: Lippert U-Bolt and Nut Kit for 10,000-lb to 16,000-lb Trailer Axles - 5" Wide
- Shop: Long U-Bolt Kit for Roadmaster Comfort Ride Suspension System - For 3" Diameter Axles
- Q&A: What Torque Should Be Used For U-Bolt Nuts On Trailer Suspension
- Shop: Trailer Wiring
- Shop: U-Bolt Kit for Mounting 5,200-lb to 7,000-lb, Round Trailer Axles - 7" Long U-Bolts
- Shop: Fifth Wheel Hitch
- Video: Let’s Check Out the 4-Leaf Double-Eye Spring for 4,400-lb Trailer Axles
- Q&A: Can 3500 lb Leaf Springs Be Upgraded to Heavier Duty for a 2020 Grand Design Imagine 2400BH
- Shop: Suspension Enhancement
- Video: Installing the Dexter U-Bolt Kit on a 2018 Grand Design Reflection Fifth Wheel
- Shop: Base Plate for Tow Bar
- Video: Let’s Check Out the CE Smith U-Bolt Kit for Mounting Round Trailer Axles
- Article: Double-Eye Trailer Suspension System Review
- Q&A: What is Overall Length of Tie Down U-Bolt Spare Tire Mount # TD58FR
- Video: Review of Fastway Weight Distribution Shank 2-1/2 Inch - FA88FR
- Shop: Camper Tie-Downs
- Q&A: Can Longer Trailer Suspension Equalizer be Replaced with Shorter One
Explore Expert Info
![Our Expert]()
on Trailer Suspension Parts
on Trailer Suspension Parts
Brian
5/14/2026
So I just went through this with my 16' car hauler with 3500 lb axles. U bolts were 1/2" and the spec given to me by a trailer shop was 75-90 foot pounds. I went in the middle at around 80-84 and stripped 2 of them. So I agree with the previous statement of 45-70. Brought them back to trailer shop and got them warrantied but they say they don't torque them just put them tight.....ugh!!