Update your truck with proper alignment and improved safety, with the OTR 3/4" U-Bolt Hi-Nut with Expertise Built In. Due to its ability to securely fasten the axle to the leaf spring, this replacement nut is the ideal choice to maintain proper alignment and evenly distribute the weight from vehicles, trailers, and cargo mounts. Constructed with resilient metal for bolstered durability and resistance to extreme torque. FleetPride is your First Click in Heavy Duty.