Secure crossmembers, brackets, and small accessories to 3-inch trailer frames with a low-profile, rust-resistant square bend U-bolt.

Optimize your light-to-medium-duty marine towing setups with this premium Galvanized Square U-Bolt. Featuring a precision 3-1/16" inside width paired with a compact 2-13/16" inside length, this high-tensile fastener is specifically engineered to wrap snugly over standard 3-inch square steel tubing. The low-profile length provides a clean, flush fit for standard-thickness brackets, guide-on plates, and electronic mounts without excess thread overhang. Hot-dip galvanized for ultimate marine defense, it is built to survive constant saltwater immersion, road grime, and harsh coastal environments without rusting.

Key Features

• Compact 2-13/16" Low-Profile Length: Tailored specifically for standard-thickness mounting plates and brackets, preventing protruding excess threads under the chassis.

• Precision 3-1/16" Inside Width: Fits perfectly and snugly over standard 3" square or rectangular steel trailer frames, eliminating slipping, twisting, and vibrating.

• Hot-Dip Galvanized Armor: Coated in a thick, molecularly bonded layer of zinc to provide exceptional rust, scale, and corrosion defense in freshwater and saltwater marine environments.

• High-Clamping 7/16"-14 Threads: Standard 7/16" coarse threads offer a secure, high-torque lockdown that maintains uniform pressure without stripping out.

Technical Specifications