Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 816303-047-13.25IN found under Impeller Pump Centrifugal by Grundfos Cbs Inc. The National Stock Number assigned to this part is 4320013350560, 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 816303-047-13.25IN.