Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 250V50 found under Valve Vacuum Breaking by Thermal Engineering International. The National Stock Number assigned to this part is 4820011734072, 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 250V50.