Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A3.3712-2 3IN ITEM 12 found under Indicator Valve Ope by Dmi Young And Cunningham Ltd. The National Stock Number assigned to this part is 4820998635055, 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 A3.3712-2 3IN ITEM 12.