Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 12431ITEM1 found under Positioner Valve by A C I Controls Inc. The National Stock Number assigned to this part is 4810015417316, and the Federal Supply Class is 4810 Valves Powered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 12431ITEM1.