Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1031666 found under Stem Fluid Valve by Le Bozec Filtration Et Systemes. The National Stock Number assigned to this part is 4820012585001, 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 1031666.