Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AS8040F3-121 found under Packing Preformed by Aerojet Rocketdyne Inc. The National Stock Number assigned to this part is 5330011479651, and the Federal Supply Class is 5330 Packing And Gasket Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like AS8040F3-121.