Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number W3920-200 found under Seal Plain by Waterous Company. The National Stock Number assigned to this part is 5330012627462, 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 W3920-200.