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MAT

U-Bolt Kit – 1/2" – For 3.5K Axles | MT
SKU: 35UBKT12
$23.00 USD $23.00 USD $35.00 USD
Sale 34.29% $12.00 USD (34.29%)
Shipping calculated at checkout.
In stock
Description

This 1/2" U-bolt kit is designed to securely attach 1-3/4" wide leaf springs to 3,500 lb round trailer axles with a 2-3/8" outer diameter. It includes all essential hardware for a complete axle-to-spring mounting solution.

Detailed Information:
Axle Compatibility 3,500 lbs (2-3/8" round axle)
Spring Compatibility 1-3/4" wide leaf springs
U-Bolt Size 1/2"-20 x 5-1/2" long
Tie Plate Fitment Fits 1-3/4" springs
Bolt Hole Type 1/2"-20 thread
Fitting:

Compatible with 3.5K round axles (2-3/8" OD) from Dexter, Rockwell American, TK, and other major manufacturers. Designed to be used with 1-3/4" wide leaf springs. Spring seats not included.

Features:
  • Complete Mounting Kit: Includes (4) U-bolts, (2) tie plates, and (8) 1/2"-20 hex nuts.
  • Reliable Construction: Built from high-quality materials for long-lasting axle-to-spring connection.
  • Easy to Install: Ideal for new axle setups or spring mounting replacements.
  • Multi-Brand Compatibility: Works with most 3,500 lb round axle designs across leading trailer brands.
Interchangeable Part Numbers:
  • LIBRA 2007935UBKT
  • MATAPUBR-1(GR5)
  • 238/UBLTKIT
Product Overview:

The U-Bolt Kit – 1/2" – For 3.5K Axles (2-3/8" Round, 1-3/4" Springs) | MT is a complete solution for securing leaf springs to round trailer axles. Whether you're building a new trailer or replacing worn hardware, this kit delivers strength, compatibility, and convenience in one package.

We want you to be completely satisfied with your purchase. That’s why we offer a hassle-free return policy within 30 days of delivery*. If your item is unused, in original packaging, and eligible for return, you can send it back for a refund or exchange.

*Some exclusions may apply

Some of our products are backed by a 1-year limited manufacturer warranty covering defects in materials and workmanship under normal use. If you experience any issues during this period, we’ll work with you to repair, replace, or resolve it according to warranty terms.*

*Proof of purchase required

Need it fast? We’ve got you covered. Orders confirmed before 3 PM Eastern Standard Time (Monday–Friday) are processed and shipped out the same business day. Orders placed after the cutoff will ship the next business day.
U-Bolt Kit – 1/2" – For 3.5K Axles | MT

Customer Reviews

Based on 12 reviews
83%
(10)
17%
(2)
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L
Luis Delgado
Minor Scratches, But a Great Kit

A couple of the parts had small scratches, but it's a trailer part, so it's not a big deal. The kit is well-made and performed perfectly.

M
Miroslav Krstić
Perfect Kit for 3.5K Axles

Had to replace the hardware on my utility trailer. This kit was a perfect fit for my 2-3/8" axle and 1-3/4" springs. The quality is excellent for the price.

K
Kevin Jones
Fits Multiple Brands

I have a Rockwell American axle, and this kit was a perfect fit. The interchangeability with different brands is a huge plus.

Z
Zachariah Cubbino
Everything Included

I appreciated not having to buy the nuts separately. This is a great all-in-one kit that saved me a lot of hassle.

A
Alaster Byre
Reliable and Sturdy

Used this to install new leaf springs. The components feel very strong and are holding everything together perfectly.

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