The Dorman Round Clockwise (Right) Serrated Carbon Steel Wheel Lug Stud is designed to meet the highest industry standards for strength and durability. This wheel lug stud is made from carbon steel materials that meet SAE automotive industry standards, and undergoes industry-standard proof-load testing to ensure strength. It also undergoes 72-hour salt spray testing to simulate three years of corrosion resistance. The black oxide finish provides additional corrosion resistance. With its 1.5" head diameter, this wheel lug stud is sure to provide a secure fit. FleetPride is your First Click in Heavy Duty®.