Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2000L found under Valve Pressure Equalizing Gaseou by Dixon Valve And Coupling Co. The National Stock Number assigned to this part is 4820016087695, 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 2000L.