Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 9HE959 found under Back Up Ring Preformed Packing by Oshkosh Corporation. The National Stock Number assigned to this part is 5330000050572, 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 9HE959.