Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number EW-558H found under Ferrule Air Ejector by Dc Fabricators Inc. The National Stock Number assigned to this part is 2825009501797, and the Federal Supply Class is 2825 Steam Turbines And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like EW-558H.