Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DDG 870214-6 ITEM 17 found under Gasket by William E Williams Valve Corp. The National Stock Number assigned to this part is 5330013284204, 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 DDG 870214-6 ITEM 17.