Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AE4155PIECE11-1 found under Packing Preformed by Btr Valve Sealants Inc. The National Stock Number assigned to this part is 5330006466769, 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 AE4155PIECE11-1.