Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number EPR18 found under Valve Regulating Fl by Alco Industries Inc. The National Stock Number assigned to this part is 4820006789305, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like EPR18.