Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 250403 found under Pole Piece Valve by Woodward Hrt Inc. The National Stock Number assigned to this part is 6615002255620, and the Federal Supply Class is 6615 Automatic Pilot Mechanisms And Airborne Gyro Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 250403.