Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number EJ4X12-1 2FFSOASTYLE1000(350PSI found under Expansion Joint Pipe by Unaflex Inc. The National Stock Number assigned to this part is 4730014661626, 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 EJ4X12-1 2FFSOASTYLE1000(350PSI.