Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R431008277 found under Valvelineardirectional Control by Aventics Ltd. The National Stock Number assigned to this part is 4820016838095, 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 R431008277.