Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number W55-16143 found under Gasket by Watson H S Co. The National Stock Number assigned to this part is 5330008090942, 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 W55-16143.