This is a 2 3/8" Round Oiled U Bolt kit for mounting your Trailers Leaf Springs to your Round Axle. This U Bolt Kit is used for 3500 lb Capacity Trailer axles. The 2 3/8 inch tube is the industry standard for this capacity of trailer axle. This Kit includes (2) 4 " x 6" U Bolt Mounting Plates, (4) 1/2" x 2 3/8" x 5 1/4" Round Steel Oiled U Bolts, (8) Lock Washers, and (8) Nuts.
The components in this kit are all steel, making it ideal for land trailers and freshwater boat trailers. This would be the correct kit to select for all our Painted Steel Axles. We do additionally have this kit available with galvanized u bolts, hardware and plates if corrosion is an issue with your application. You can additionally use Boeshields T-9 Rust and Corrosion Protection Waterproof Lubrication Spray to provide additional protection against corrosion.