The Dorman Round Carbon Steel Serrated Wheel Lug Stud is designed to meet the highest standards of automotive industry durability. Made from carbon steel, this lug stud undergoes industry-standard proof-load testing to ensure strength and durability. It also undergoes 72-hour salt spray testing to simulate three years of corrosion resistance. The black finish provides additional corrosion resistance. With its 1.278" head diameter, 0.784", this lug stud is sure to provide a secure fit. FleetPride is your First Click in Heavy Duty®.