Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AA1589 73 found under Orifice Restrictor by Allan Aircraft Supply Co Llc. The National Stock Number assigned to this part is 4730012704119, 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 AA1589 73.