Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2011 found under Valve Angle by Ge Ruska Instrument Corporation. The National Stock Number assigned to this part is 4820010524349, 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 2011.