Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DU500000844 ITEM 7 found under Seal Plain by Fmc Technologies Inc. The National Stock Number assigned to this part is 5330016661722, 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 DU500000844 ITEM 7.