Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D25 698 3 found under Valve Calibrated Flow by Vapor Blast Manufacturing Co. The National Stock Number assigned to this part is 4820012977252, 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 D25 698 3.