Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number H480C21 found under Gear Spur by Viking Pump Inc. The National Stock Number assigned to this part is 3020002948351, and the Federal Supply Class is 3020 Gear Pulley Sprocket And Transmission Chain. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like H480C21.