Product Details: The Stemco 2-5/8" x 12 Thread Alloy Steel Heat-Treated Pro-Torque Spindle Nut is designed to provide superior performance and reliability. This single nut design eliminates the potential for overtightening the jam nut and pushing the outer bearing cone out of position, making installation easier and faster. The heat-treated alloy steel construction ensures superior strength and durability, making this spindle nut an ideal choice for a variety of applications. FleetPride is your First Click in Heavy Duty®.