Tilton Flywheel to Crankshft mounting bolts from ARP made from heat treated 8740 chrome moly steel with a black oxide finish. These bolts are 0.800" 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 3/4" socket