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These ARP hex bolts are 5/16-24 x 4.250-inch fasteners supplied in a pack of five with a black oxide finish, intended for high-strength fastening tasks where this thread and length are specified. They serve as direct replacement or upgrade bolts for compatible assemblies that call for 5/16-24 hardware and provide consistent clamping when matching factory torque specifications.
ARP 5/16-24 x 4.250 Hex Black Oxide Bolts (Pack of 5)
