The SGL stud is a non-threaded stud, symmetrical with 2 chamfers. Thus after welding the stud is non-threaded up to the weld-fillet. Following to needs, 2 kind of chamfers possibles, 45° or 60°. The diameter of the weld-fillet is approximately 1-2 mm larger than the diameter. The maximum load is identical to the load of a 4.8 screw.