Building and construction materials and elements of metal; common metals and their alloys; transportable buildings of metal; materials for rails; cable and wires (not for electrical purposes); ironmongery, small items of metal hardware; fastening and connection elements, in particular bolts, screws, nuts, and components and accessories therefor of metal; connecting means, namely, screws, including screws for thin sheet-metal joints and metallic mass-produced parts of all kinds (small items of...