Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2503178-002 found under Coupling Assembly Tube Flexible by Evac North America Inc. The National Stock Number assigned to this part is 4730014523924, 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 2503178-002.