Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4-S0-025-0.20-FXFXC159B7E20 found under Expansion Joint Pip by Flexible Metal Inc. The National Stock Number assigned to this part is 4730015296898, 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 4-S0-025-0.20-FXFXC159B7E20.