Tilton Flywheel to Crankshft mounting bolts from ARP made from heat treated 8740 chrome moly steel with a black oxide finish. These bolts are 7/8" long and are commonly used on Ford and Chevy V8 engines and other applications with 7/16" UNF crank threads. These bolts are the 12 Point, reduced head version for use with a 1/2" socket