Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 120-02603 found under Elbow Pipe by Aqua Chem Inc. The National Stock Number assigned to this part is 4730013515847, 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 120-02603.