Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 51DHC9 found under Elbow Tube by Precision Form Rivet Inc. The National Stock Number assigned to this part is 4730004031662, 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 51DHC9.