Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number N4004 found under Stem Valve by P J Valves Inc. The National Stock Number assigned to this part is 4820000097461, 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 N4004.