Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RV-40 24C USED ON S N 55901-4 found under Retainer Packing by The Walter Machine Co Inc. The National Stock Number assigned to this part is 5330013482539, 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 RV-40 24C USED ON S N 55901-4.