4 - Standard 2-3/8" Round U-bolts 3500# Trailer Axle 5-1/2" w/Nuts 2-1/2" ID Kit Regular (UBK-3500-R)

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3500 lb Trailer U-Bolt & Plate Kit – Fits 2-3/8" Round Axles

Part Number – UBK-3500-R

This complete U-bolt and plate kit is designed for standard 2-3/8" round 3500 lb axles. It includes everything required to secure the axle to your leaf springs — perfect for utility, cargo, landscape, and boat trailers.

All components are sized to OEM-spec dimensions and fit the majority of 1.75" wide leaf springs commonly used in 3500 lb axle assemblies.

What’s Included

Component	Details	Qty
U-Bolts	1/2" diameter 5-1/2" length Formed for 2-3/8" round axles	4
Locking Nuts	1/2" fine-thread, zinc-coated	8
U-Bolt Plates	4.75" × 3.75" Fits 1.75" leaf springs Appearance may vary slightly	2

Specifications

Specification	Detail
Axle Type	2-3/8" Round (3500 lb)
Spring Compatibility	1.75" Wide Leaf Springs
Material	Steel (raw or coated depending on batch)
Typical Use	Utility, cargo, landscape, and boat trailers

One kit services a single axle. For tandem trailers, order two kits.

View All U-Bolt Kits & Suspension Hardware

4 - Standard 2-3/8" Round U-bolts 3500# Trailer Axle 5-1/2" w/Nuts 2-1/2" ID Kit Regular (UBK-3500-R)

3500 lb Trailer U-Bolt & Plate Kit – Fits 2-3/8" Round Axles

What’s Included

Specifications

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