Connecting elements of metal, namely, bolts, nails, screws, nuts, screw nuts, blind rivet nuts, rivet nuts, rivets, washers, rivet screws, captive screws, captive rivet screws, threaded inserts, inserts, inserts for expansion, inserts for overmoulding, self-tapping inserts, screw-in insert nuts, notched inserts, pins, rivet pins, dowel rods, rivet dowels, rivet studs; metal clamps; pipes, tubes, rings, bolts, nails, nuts, rivets, washers, screws, all these goods made of metal