Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number VX4300-001 found under Valve Regulating Temperature by Robertshaw Controls Company. The National Stock Number assigned to this part is 4820010186561, 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 VX4300-001.