Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number P646A0425 00 found under Back Up Ring Preformed Packing by Moog Wolverhampton Ltd. The National Stock Number assigned to this part is 5330016708352, 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 P646A0425 00.