Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AV99-005-3PC57B found under Reducer Pipe by Automatic Switch Company. The National Stock Number assigned to this part is 4730014288772, 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 AV99-005-3PC57B.