Outfit your truck or trailer to be Ready for the Road Ahead™ with secure axles, with the Stemco 3.48"-12 Zip-Torq® Axle Spindle Nut. To deliver enhanced performance, this replacement nut locks the axle in place while maintaining the wheel bearing preload, and tolerating intense amounts of torque from large-sized vehicles. Fashioned 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®.