Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number X20-9901-683 found under Packing With Retainer by Bae Systems Bofors Ab. The National Stock Number assigned to this part is 5330008068769, 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 X20-9901-683.