Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number L7S139 found under Rubber Round Section by C E Conover And Co Inc. The National Stock Number assigned to this part is 5330001068517, 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 L7S139.