Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B2-5831 found under Gasket by Continental Emsco Co Skagit Prod. The National Stock Number assigned to this part is 5330002707843, 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 B2-5831.