Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 388 5173-801 found under Coupling Shaft Flexible by Cargotec Usa Inc. The National Stock Number assigned to this part is 3010014328233, 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 388 5173-801.