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A loose axle can turn into a rough ride fast. This replacement U-bolt clamps your 1-1/2" wide, square axle solidly to the leaf spring using a U-bolt plate and another matching U-bolt. Built from 1/2"-13 diameter steel with a raw finish, it’s made to handle the job on 3,500-lb axles. At 5" long with an inner width of 1-1/2" and 2" between bolt ends on center, it fits cleanly and holds steady through miles of towing.
When factory U-bolts corrode or stretch, suspension alignment suffers. This exact replacement brings the setup back to spec so your axle and spring stay aligned and secure. It’s built as part of a standard trailer suspension system—just pair it with a U-bolt plate (not included) and another matching U-bolt to lock everything in place.
No hunting around for hardware. This U-bolt comes complete with matching nuts sized for its 1/2" threading, giving you everything needed to fasten one side of your axle to the spring pack. With proper torque between 45 and 70 ft-lbs, the connection stays snug and reliable mile after mile.
The raw finish makes it flexible for any setup—paint, coat, or install as is. Whether you’re refreshing worn suspension parts or finishing a custom build, this solid steel U-bolt gives you a dependable way to keep your square axle clamped tight.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today, we're going to be taking a look at a replacement U-bolt with nuts for 1 1/2" wide square trailer axles. You would use the U-bolt with a U-bolt plate and an additional U-bolt with the same dimensions to secure an axle to the leaf springs, which are mounted to the trailer frame. This is going to feature a threaded portion on each end. That threaded portion measures about 2" on each side. If we put a ruler on that, you can see that the threaded portion, from the bottom of the post to the top of the thread, measures 2" long. This is designed to fit a square 1 1/2" wide trailer axle. It is for 3500 pound axles only.
It's going to come with the included nuts. The opening is going to measure about 1 1/2", so that's how we can tell it's for 1 1/2" wide trailer axles. The bolt diameter is 1/2". The length from the bottom of that portion, there, to the end of the threaded area is going to measure 5" long. Then, again, that opening is going to give us an inside width measurement of 1 1/2". That's going to do it for today's look at the replacement U-bolt..
Customer Satisfaction Score:
96% were satisfied with this product
4% of customers were not satisfied
Ratings & Reviews
Eric
8/30/2021
I sold the trailer that this part was installed, but the installation went smoothly, and I was happy with my purchase.
Gerald
11/24/2023
Trailer still holding up.
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Info for this part was:
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Steven G.
9/11/2017
Working great ,,no complaints. ....