Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AV39-984PC31 found under Piston Valve by Automatic Switch Company. The National Stock Number assigned to this part is 4820003015513, 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 AV39-984PC31.