Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 504743PC40 found under Bearing Capstan by Control Flow Inc. The National Stock Number assigned to this part is 3950003061547, and the Federal Supply Class is 3950 Winches Hoists Cranes And Derricks. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 504743PC40.