Jürgen Hierold: Today's car body structures combine materials such as steel, aluminium and magnesium alloys. So traditional assembly methods, such as the conventional resistance welding method, are being replaced by alternative joining techniques. Rivets are a possibility if the fastening point is accessible on both sides. If the design prevents this method from being used, screw fastenings made with flowform screws come to the fore as the solution to the problem. Flowform screws create a very high-strength fastening and form a process-reliable joint for different types of sheet metal.