Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number C4FA1-1 found under Valve Calibrated Flow by Wa Kates Company The. The National Stock Number assigned to this part is 4820012061648, 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 C4FA1-1.