Product Details: Ensure your truck or trailer is Ready for the Road Ahead™ with secure axles, with the Euclid 3-1/4" Outer Trailer 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®.