1/2 in.Dia., 7/16 -20 THD Ring Gear Bolt Kit by ARP ARP Pro series ring gear bolts are forged from premium-grade 8740 chromoly steel and heat-treated to a rating of 200,000 psi. Specially hardened, precision-ground washers are also included, where required. Features Head Style:12-point Thread Size:7/16 in.-20 Underhead Length (in.):1.060 in. Fastener Tensile Strength (psi):200,000 psi Washer Included:Yes Fastener Material:8740 chromoly Fastener Finish:Black oxide Benefits Forged from premium-grade 8740 chromoly steel Heat-treated to a rating of 200,000 psi Please Note: 1/2 inch shank Applications Universal What\’s In The Box? 12 – Bolts Warranty Manufacturers Standard Warranty