The threaded stud type MPF-DUO consists of two different materials. It is threaded to approximately the top of the welding tip. The diameter of the unthreaded stud section on the welding tip corresponds to the pitch diameter of the thread. Thus the diameter of the weld-fillet is approximately 3-4 mm larger than the external diameter of the thread. The maximum load is identical to the load of a 4.8 screw.