Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4290-06-06 found under 90Deg Barb Fitting by Mobile Hydraulic Equipment Company. The National Stock Number assigned to this part is 4730016021789, 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 4290-06-06.