Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ARP-009B found under Packing Preformed by Derbyshire Mack And Morgan Inc. The National Stock Number assigned to this part is 5330015585843, 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 ARP-009B.