Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 338BLK1X4-1 2IN found under Nipple Pipe by Itt Grinnell Corp. The National Stock Number assigned to this part is 4730001961555, 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 338BLK1X4-1 2IN.