Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number E2-2123 PC18 found under Piston Valve by Magnatrol Valve Corporation. The National Stock Number assigned to this part is 4820014401342, 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 E2-2123 PC18.