Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AA 1-4IN-SS20.0 found under Nozzle Spray Fluid by Sioux Corporation. The National Stock Number assigned to this part is 4730011877079, 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 AA 1-4IN-SS20.0.