Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2491FHD4-2 found under Elbow Pipe To Tube by Hayes Dana Ltd Corporate Offices. The National Stock Number assigned to this part is 4730003352578, 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 2491FHD4-2.