Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 21392000PSI3 4X1 4 found under Bushing Pipe by Itt Grinnell Corp. The National Stock Number assigned to this part is 4730008398791, 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 21392000PSI3 4X1 4.