Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number VST450E-250 found under Valve Regulating Fl by Victor Equipment Co. The National Stock Number assigned to this part is 4820013388822, 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 VST450E-250.