The Meritor 3.25" Thread Diameter Temper-Loc Spindle Nut is designed to minimize premature seal failure and improve seal and brake lining programs. It eliminates the potential for overtightening the jam nut and pushing the outer bearing cone out of position. This spindle nut also features a single nut design, which means less time wasted trying to reposition multiple-nut assemblies. FleetPride is your First Click in Heavy Duty®.