Get your truck or trailer Ready for the Road Ahead™ with secure axles, with the Stemco 3-1/2"-12 Pro-Torq® Replacement Keeper. With an advanced design, this replacement nut locks the axle in place while maintaining the wheel bearing preload, and tolerating intense amounts of torque from large-sized vehicles. Manufactured with exact measurements and enhanced durability to provide easy installation with a socket on front and rear axles. FleetPride is your First Click in Heavy Duty®.