Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number U8904 89 04 found under Coupling Hose by Southern California Gold Products. The National Stock Number assigned to this part is 4730016721318, 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 U8904 89 04.