Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CV52-120 found under Valve Check by Circor Aerospace Inc. The National Stock Number assigned to this part is 4820015344237, 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 CV52-120.