Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AC2297 found under Reducer Pipe by M B Companies Inc. The National Stock Number assigned to this part is 4730007536271, and the Federal Supply Class is 4730 Hose Pipe Tube Lubrication And Railing Fittings. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like AC2297.