Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number N11059 PC9 4IN found under Stem Fluid Valve by Walworth Co. The National Stock Number assigned to this part is 4820010673970, 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 N11059 PC9 4IN.