Ussuray Trailer U-Bolt Kit for 3in Round Axle — 7in Legs, 1/2in Diameter OEM-Style Replacement

Ussuray's New Trailer U Bolt Kit is a complete replacement set of heavy-duty U bolts, nuts and tie plates designed to secure 3" round axles on 5200–7000 lb trailers.

This kit provides a straightforward, OEM-style repair option when U bolts or mounting hardware on a trailer axle become worn or damaged. Engineered to match common factory dimensions, the set includes four 7" long, 1/2" diameter U bolts sized for a 3" axle beam, plus matching nuts and tie plates for 1-3/4" leaf springs. The components are made from durable steel and sized for a tight, direct replacement to restore clamp force and alignment without custom modifications.

How do these U bolts match my trailer’s axle and springs?

The kit is specifically sized for trailers with a 3" round axle beam and leaf springs that are 1-3/4" wide. The 7" length and 3" inside width accommodate typical axle and spring stack dimensions used on 5200–7000 lb-rated trailers. That direct sizing helps ensure proper clamping pressure and alignment when installed.

• Designed for 3" round axle beams
• 3" inside width fits standard spring perch spacing
• 7" leg length clears spring stacks and hardware
• 1/2" diameter matches common OEM thread strength

What comes in the package and why each part matters?

The kit supplies everything needed to replace worn U bolts: four U bolts, eight hex nuts sized 1/2"-20, and two tie plates sized for 1-3/4" leaf springs. Supplying matched nuts and tie plates avoids fitment issues and simplifies installation, so you don’t need to source additional pieces to complete the repair.

• 4 x 7" U bolts for full axle clamp coverage
• 8 x 1/2"-20 hex nuts for secure fastening
• 2 x tie plates to distribute load across springs
• All parts engineered to fit together like original equipment

How difficult is installation and what tools will I need?

Installation is designed to be simple and fast for someone with basic mechanical skills. No specialty tools are required — a properly sized socket or wrench for 1/2"-20 nuts and a torque wrench to achieve correct clamp torque are recommended. The kit is intended as a direct swap for broken or corroded U bolts, allowing many users to complete the job in minutes per bolt bank.

• Only common hand tools needed (socket/wrench set)
• Torque wrench recommended for proper clamping torque
• Direct-replacement sizing minimizes filing or drilling
• Quick removal of old hardware and reassembly saves time

How durable is the hardware and what maintenance is suggested?

These components are made from steel and manufactured to mirror OEM form and fit for robust clamping under trailer loads. Regular visual inspections and periodic re-torquing of the nuts after initial road miles will help maintain a secure mount. If corrosion is a concern, consider protective coatings or seasonal replacement schedules for trailers stored in marine or salted-road environments.

• Steel construction for load-bearing durability
• Matched parts minimize looseness and uneven wear
• Inspect and re-torque after first 50–100 miles of use
• Apply anti-seize or protective coatings for harsh conditions

Who is this for: Ussuray’s New Trailer U Bolt Kit is aimed at trailer owners, repair shops, and fleet operators who need a reliable, OEM-dimension replacement for worn or broken U bolts on 5200–7000 lb trailers with 3" round axles. It’s suitable for do-it-yourself installers who want a complete set with matched nuts and tie plates, as well as professionals who prefer ready-to-fit hardware that restores original clamping function quickly.