Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number X5433-04-001 3 found under Valve Float by Atmosphere Control International. The National Stock Number assigned to this part is 4820009476308, 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 X5433-04-001 3.