Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number C2-825 found under Valve Check by Vickers S Y S Inc. The National Stock Number assigned to this part is 4820006239736, 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 C2-825.