Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number EA424-1 found under Valve Linear Directional Control by Piezo Mfg Corp. The National Stock Number assigned to this part is 4820010049212, 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 EA424-1.