Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SMU54378-2 found under Gearcase Motor by Cone Drive Operations Inc. The National Stock Number assigned to this part is 3010012751727, and the Federal Supply Class is 3010 Torque Converters And Speed Changers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SMU54378-2.