Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S000057 found under Coupling Pipe by General Dynamics Land Systems. The National Stock Number assigned to this part is 4730004070571, 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 S000057.