Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 424 1 2IN found under Valve Globe by Hammond Valve Corp. The National Stock Number assigned to this part is 4820010101124, 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 424 1 2IN.