Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BK-9987771010 found under Parts Kit Torque Converter by Tcm America Inc. The National Stock Number assigned to this part is 2520012507192, and the Federal Supply Class is 2520 Vehicular Power Transmission Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like BK-9987771010.