Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4000-37330 found under Piston Valve by Moog Inc. The National Stock Number assigned to this part is 4820014202139, 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 4000-37330.