Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number VTS250B-580 found under Valve Regulating Fluid Pressure by Amerigas Inc. The National Stock Number assigned to this part is 4820012831915, 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 VTS250B-580.