Outfit your truck or trailer to be Ready for the Road Ahead™ with secure axles, with the Stemco 3.48"-12 Pro-Torq® Axle Spindle Nut with Lock. Thanks to its advanced design, this replacement nut is able to lock the axle in place while maintaining the preload from the wheel bearing, and enduring incredible amounts of torque from large-sized vehicles. Crafted with precise measurements and enhanced durability to provide easy installation with a socket on front and rear axles. FleetPride is your First Click in Heavy Duty®.