RBS stocks the L-19 Top Fuel spec. heat treated steel eight piece twelve point bolt and washer kit for a Hemi flywheel. Bolt is heat treat finish and washers are black oxide finish. Under head to last thread is 1.00", .625" of thread, .375" of shoulder, 1/2-20" thread and washer is .120" thick.
This flywheel bolt is made from the most durable material in the industry L-19!! Its strength is superior to regular steel and will allow the racer better clamping load than a conventional bolt.