Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4 INCH 1433 found under Valve Ball by Orbit Valve Co. The National Stock Number assigned to this part is 4820012707853, 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 4 INCH 1433.