Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NL424-1 found under Stem Valve by Tyco Valves And Controls Lp. The National Stock Number assigned to this part is 4820009733775, 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 NL424-1.