Extra large repair oversize 1/2-13 to 3/8-24 x 1.6" long. (For your reference: Standard oversize is 7/16-14 to 3/8-24 threaded / FMC-989-718 and stock is 3/8-16 to 3/8-24 threaded /FMC-989-715). Used in transmission cases with stripped threads where regular oversize is to small. Used to mount the transmission housing to the transmission mount plate. OEM replacement reference 34723-47.