TJ-1-R 2mm female banana connector 

Features:

• Poles: 1 Pole
• Rating: 5A @ 30V
• Body Dimensions: 24.2mm Length x 6.0mm Diameter
• Mounting Hole Diameter: 6.1mm x 5.0mm Oval (keyed) or 6.1mm Round (unkeyed)
• Insulation Resistance: DC500V, 100Meg Ohm Min.
• Withstand Voltage: AC1,000V 1 Minute
• Main Insulator: Polyamide 6
• Body Color Different