Sanwa Denshi AT Connector accessory

Both the .187 (4.8mm) and .110 (2.8mm) connectors are an open barrel non-insulated quick disconnect. These are official items supplied by Sanwa Denshi.

These connectors are utilised for joysticks and push buttons in both a fightstick and arcade cabinet application, sliding onto the microswitch terminal.  

A crimp tool is required to join the exposed wire to these connectors.