This 2.5 Inch Serrated Wheel Lug Stud is a practical and durable solution for various wheel lug stud applications. Made from carbon steel with a black finish, it features a 0.813 inch knurl diameter and a 1.278 inch head diameter. With a fine thread type and 16 threads per inch, it ensures a secure fit. This lug stud is corrosion tested for 72 hours, providing 3 years of corrosion resistance. It also undergoes industry-standard proof load testing to ensure strength. Sold in a pack of 5, this lug stud is a reliable choice that meets SAE automotive industry standards.