Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S2253887-4-013 found under Restrictor Fluid Flow by Boeing Company The. The National Stock Number assigned to this part is 4730004759971, 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 S2253887-4-013.