The Seachoice Galvanized Square U-Bolt (1-5/8" x 3-9/16") is a heavy-duty, marine-grade fastener engineered to provide a secure and reliable hold for your boat trailer frame, brackets, and suspension components. Forged from solid steel and protected by a robust hot-dipped galvanized coating, this square-bend u-bolt delivers exceptional resistance against rust and harsh saltwater corrosion. Designed for a precise fit over 1-1/2 inch square tubing, it features an inside width of 1-5/8 inches and an inside length of 3-9/16 inches, coming complete with matching nuts and lock washers to ensure a high-torque, vibration-resistant installation that keeps your trailer secure on the road.