Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RX0040 found under Valve by Jordan Electronics Div Phaostron. The National Stock Number assigned to this part is 4820008919739, 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 RX0040.