Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B7478-81 found under Impeller Pump Centrifugal by Fmc Technologies Inc. The National Stock Number assigned to this part is 4320003758902, and the Federal Supply Class is 4320 Power And Hand Pumps. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like B7478-81.