Mr. Gasket Torque Converter Bolts are forged from high quality steel and heat-treated for extra strength. These grade 8 fasteners are a must for all high-performance applications. The size of the thread is 3/8 -24" RH. It has a black plated finish which helps resist rust and corrosion. Kits are complete with lock washers. 3 per set. These bolts are for lock nuts only.