Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number N73 AND NP188 found under Adapter Straight Pipe To Gas Fit by Superior Screw Products Co. The National Stock Number assigned to this part is 4730000048238, 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 N73 AND NP188.