Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 73404P018 found under Sleeve Seal Coupler by Elster Amco Water Llc. The National Stock Number assigned to this part is 5330013997493, and the Federal Supply Class is 5330 Packing And Gasket Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 73404P018.