Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 18N0004 found under Rv Brs 1 2X3 4Npt by Chart Inc. The National Stock Number assigned to this part is 4820014724906, 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 18N0004.