Wheel Bolt - FrontBack to Results Features & Benefits Durable material - carbon steel meets SAE automotive industry standards for strength and hardness; Corrosion tested - 72-hour salt spray testing simulates three years of corrosion resistance; Tensile tested - lug studs undergo industry-standard proof-load testing to ensure strength; Trustworthy quality - backed by team of professional engineers and quality control specialists in the United States; These wheel lug studs are made of carbon steel and tested to demanding automotive industry standards to ensure strength, longevity and safety. Attributes Brand: Dorman Seat Type: Serrated Stud VMRS Code: 018003009 Wheel Bolt Knurl Dia.: .568 in. Wheel Bolt Thread Size: 12 mm - 1.5 Wheel Bolt Threads: Right Hand