Best Axle U-Bolt Kits of 2025

The A.A U-Bolt Kit is crafted from durable galvanized steel to resist rust and corrosion. The tie plates, measuring 3.5" x 3", provide stability for your trailer axle. The square U-bolts, sized 3/8"-16x2", secure the axle firmly in place. The kit includes nuts and lock washers for easy installation. Enjoy peace of mind knowing your trailer axle is well-supported and protected from environmental damage with this convenient A.A U-Bolt Kit.

LIBRA U Bolt Kit is designed for 2,000lbs 1-3/4" round trailer axles. It includes 4 U bolts that are 4-1/4" long and 1/2" in diameter, providing more strength than regular 3/8" bolts. The kit also contains 2 tie plates for 1-3/4" leaf springs and 8 hex nuts. The sturdy U bolts ensure secure attachment, while the tie plates offer added support to the leaf springs. With this kit, you can easily maintain and enhance the stability of your trailer axle.

The Dorman U-Bolt Kit is designed to securely fasten the leaf spring to your vehicle or trailer axle. This reliable hardware ensures that everything stays in place, giving you peace of mind while driving. Made from durable materials, the components are built for long-lasting performance, which means fewer replacements for you in the future. Additionally, Dorman's team of experts backs this kit, ensuring you receive trustworthy quality. To find the right fit for your vehicle, simply enter your make, model, and trim level into the garage tool, making the selection process easy and straightforward.

The MCCKLE U Bolt Kit is designed for trailers weighing between 5,200 and 7,000 pounds, ensuring a secure connection for critical components. Made from high-quality steel, this kit offers exceptional durability, handling heavy loads and vibrations with ease. You’ll appreciate the included nuts and washers, which simplify the installation process, saving you both time and maintenance costs. Plus, the kit’s adjustability allows you to customize the suspension system according to your specific trailer needs, enhancing your towing experience.

The SPARKWHIZ U Bolt Kit is designed specifically for 3,500 lb trailers with a 2-3/8" round axle. This kit includes 4 durable steel U bolts that are 5-1/2" long, with a 1/2" diameter. It also comes with 8 hex nuts and 2 tie plates for 1-3/4" leaf springs. The steel construction of this kit ensures it is resistant to rust and corrosion, making it a durable choice for trailer owners. Additionally, the U Bolt Kit enhances the performance of your braking system, providing added safety and control while on the road. With its easy installation, this kit is a convenient solution for trailer maintenance and repair.

The A.A U-Bolt Kit is designed for 2,200 lb trailer axles with a 1-3/4" round tube diameter. The u-bolts measure 4-1/2 inches in length and 2.31 inches in width, making them ideal for securing your axle firmly. The tie plates, measuring 3-1/2 inches by 3.75 inches, help distribute the load evenly, enhancing stability during transport. Made from heavy-duty galvanized steel, this kit is zinc-coated to resist rust and corrosion, ensuring durability. With included nylon lock nuts, you can trust that everything will stay securely in place, giving you peace of mind on the road.

SPARKWHIZ U Bolt Kit is designed for 5,200 - 7,000lbs round axles with a 3" diameter. It includes 8 durable 7" long U bolts and 16 hex nuts for easy installation. The 1/2" diameter U bolts are resistant to rust and corrosion, enhancing your braking system's performance. Additionally, it comes with 4 tie plates for 1-3/4" leaf springs, ensuring a secure fit. This kit provides durability, convenience, and improved braking efficiency for your trailer.

The A.A U Bolts Kit is constructed from robust 1/2" thick steel, ensuring durability for your trailer needs. Its zinc coating effectively prevents rust, making it ideal for use in both saltwater and freshwater environments. Whether you’re navigating coastal conditions or icy terrains, this kit stands up to the challenge. Designed for a 2x2 square axle, it offers universal compatibility and can be easily adjusted to fit your specific trailer requirements. This versatility means you can rely on it for various applications, providing peace of mind during your travels.

The Oldriver U-Bolt Kit is designed for mounting trailer axles with 3-inch diameter leaf springs, providing a secure fit for weights between 5,200 to 7,000 lbs. Crafted from high-strength steel, this kit ensures reliable performance whether you're using it regularly or under heavy loads, enhancing your ride's stability and safety. The U-bolts feature a robust 1/2-inch diameter and a threaded design for superior tightening, giving you peace of mind on the road. Additionally, the powder-coated connecting plates and galvanized U-bolts offer excellent rust resistance, ensuring long-lasting durability.

The Ussuray Trailer U Bolt Kit is designed for 5200-7000lbs round axles with a 3-inch beam diameter. This kit includes four durable U bolts, each measuring 7 inches in length and 1/2 inch in diameter, along with hex nuts and tie plates. The high-quality steel construction ensures a snug fit, preventing any looseness during use. Installation is straightforward and does not require special tools, allowing you to replace broken components quickly and easily. With this kit, you can restore your trailer's functionality in just a few minutes.