Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3-4 80D250PS1 found under Valve Assembly by The Clark Eliance Corp. The National Stock Number assigned to this part is 4820008377416, 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 3-4 80D250PS1.