General Motors 200, 700, 4L60 4L80 (3 pieces car), .590 Under Head Length, M10 x 1.5 Thread Size, Pro Series ARP Torque Converter Bolts 230-7304With ARP Torque Converter Bolts You can forget about the problem of shearing a torque converter bolt after you install these super strong 200,000 psi gems.They are designed for each specific application and provide the optimum grip. Kits come with hardened parallel-ground washers.