Lucar Connector / FastOn
These connectors are used in most 'continental' cars.
Even in industrial applications are these connectors a widely used connection methode.
These terminals are availablel in the following sizes, but please note not every size is on stock.
2.8mm, 4.8mm, 6.3mm (1/4") and 9.5mm
There are several names for this connection type: Lucar-Connector, Lucas-Connector, FastOn, Flachstecker, ...