Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ERKV-3 found under Repair Kit Valve by A A A Products Co. The National Stock Number assigned to this part is 4820016025904, 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 ERKV-3.