Ussuray Trailer U-Bolt Kit for 3" Round Axles — 4×7" U-Bolts, 1/2" Dia, Fits 5200–7000 lb Trailers

If you're replacing worn or damaged U-bolts on a 3-inch-diameter trailer axle, this all-in-one kit from Ussuray supplies the precise parts you need for a secure, OEM-style fit. Built from durable steel and sized for 5200–7000 lb-rated trailers, the kit includes four U-bolts, matching nuts, and tie plates designed for 1-3/4" leaf springs, making it straightforward to restore proper axle-to-spring clamping without sourcing multiple components.

Will these U-bolts fit my trailer axle and springs?

These U-bolts are designed specifically for round axles with a 3" beam diameter and for leaf spring packs that use 1-3/4" tie plates. They are sized to match typical mid-range trailer capacities (5200–7000 lb).

• Axle compatibility: 3" round axle beam diameter
• Spring compatibility: tie plates for 1-3/4" leaf springs
• Trailer rating: suited for trailers in the 5200–7000 lb range

How is the kit packaged and what hardware is included?

The kit is supplied as a complete replacement set so you won’t need to buy separate nuts or plates. Every part is matched for fit and function, reducing the chance of loose or mismatched fasteners after installation.

• 4 × 7" long U-bolts (3" wide, 1/2" diameter)
• 8 × 1/2"-20 hex nuts for secure clamping
• 2 × tie plates sized for 1-3/4" leaf springs

How difficult is installation and what tools do I need?

Installation is designed to be straightforward and fast for anyone familiar with basic trailer maintenance. You’ll remove the old U-bolts and slip the new set into place; no specialty tools are required beyond common hand tools to tighten the nuts to specification.

• Typical tools: socket or wrench set that fits 1/2"-20 nuts
• Time: most replacements take only a few minutes per U-bolt pair
• Tip: tighten evenly and torque to manufacturer or shop specifications

What is the build quality and how durable are the parts?

The kit uses steel components engineered to mirror OEM geometry so each nut and bolt mates correctly. The matched hardware reduces play and ensures consistent clamping force under load when properly installed and torqued.

• Material: durable steel construction for strength and longevity
• Fit: parts manufactured to match original dimensions
• Design: hardware set reduces risk of loose or incompatible fasteners

Who is this for: This Ussuray kit is aimed at trailer owners, hobbyists, and repair shops replacing worn or broken U-bolts on trailers with 3" round axles and 1-3/4" leaf springs. It’s suitable for light- to mid-duty trailers in the 5200–7000 lb range where a matched hardware set and quick, reliable replacement are required. If you need a ready-to-install set that mirrors OEM fitment and saves time sourcing individual components, this kit is a practical choice. For best results, follow recommended torque values and inspect periodically for corrosion or loosening during routine trailer maintenance.