Aupar Heavy Duty Trailer U-Bolt Kit for 3-Inch Round Axles – 7-Inch Long (5200–7000 lbs) – 2-Pack

Overview

Meet the Aupar Heavy Duty Trailer U-Bolt Kit, a purpose-built mounting solution for 3-inch round axles. With a 7-inch bolt length and 1/2-inch diameter, this two-piece set is designed to deliver a solid fit and dependable alignment for your trailer, whether you’re upgrading worn hardware or building a reliable setup from the ground up.

Two U-bolts paired with four tie plates for 1-3/4-inch leaf springs provide a cohesive system that supports steady operation across diverse towing conditions. The kit’s straightforward design makes it a practical choice for enthusiasts and fleet operators alike who value consistency on the road.

Design and craftsmanship

Constructed from robust steel and engineered for durability, the Aupar kit emphasizes precise fit and lasting strength. The longer bolt length and reinforced plate geometry are intended to distribute load more evenly, helping your trailer maintain a confident stance when facing bumps, curves, or uneven pavement.

The components are designed with real-world use in mind, offering a clean, straightforward installation path for dependable results on trailers used for work, recreation, or travel.

Key features

• Perfect Fit: 3" round axles, 7" bolt length, 1/2" diameter; includes 4 tie plates for 1-3/4" leaf springs.
• Quality Materials: robust steel construction designed for durability and long service life.
• Enhanced Strength: improved plate design for even load distribution and stable operation.
• Secure Fastening: upgraded spring washer helps prevent nut loosening during travel.
• Trailer-Specific: designed for trailer use and compatible with Dexter, Lippert, Al-Ko, Hayes, and other quality axles.

Real-world use and benefits

In practical scenarios, this kit offers a straightforward upgrade path for mounting axle assemblies on a range of trailers. The solid fit and reliable hardware contribute to smoother operation, reduced maintenance needs, and greater confidence on long hauls. The two-piece design supports flexible applications, including dual-axle setups where needed.

• Better load distribution reduces peak stress on mounting points.
• Improved stability under heavy or uneven loads enhances towing confidence.
• Locking washer minimizes nut loosening for consistent performance.
• Durable steel construction resists wear across road textures.

Compatibility and care

Before purchase, verify your axle model and leaf spring configuration. The Aupar U-Bolt Kit is intended for trailer use and is compatible with established brands like Dexter, Lippert, Al-Ko, and Hayes. The package includes two U-bolts and four tie plates to support efficient upgrading of your axle mounting system.