Building and construction materials and elements of metal, namely, removable washer-less screw joints with integrated spring elements in thread forming screw threads of the screw joints; common metals and their alloys wrought and unwrought; metal cable wire; fastening and connection elements, in particular bolts, screws, nuts, of metal; connecting means, namely, screws, and screws for thin sheet-metal joints; metallic mass-produced parts, namely, screws; metal profile rails; fasteners of comm...