Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4150 found under Expansion Joint Pip by Chemtura Corporation. The National Stock Number assigned to this part is 4730000768803, 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 4150.