Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number C3509X4 found under Elbow Pipe by Hayes Dana Ltd Corporate Offices. The National Stock Number assigned to this part is 4730008171843, 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 C3509X4.