Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 7720055-1 found under Handle Dump Valve by Conax Technologies Llc. The National Stock Number assigned to this part is 4820012180118, 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 7720055-1.