METAL ALLOYS AND UNWROUGHT AND PARTIALLY WROUGHT COPPER, WIRES OF COMMON METAL ALLOYS, WIRES, TUBES, PIPES, TUYERES, METALLIC SPRINGS, FREE CUTTING METAL PIECES NAMELY, SCREWING ARTICLES, SCREWS, SCREWNUTS, SMALL ROUNDS, DRAWING ARTICLES, SLEEVES, RIVETS; NON-ELECTRIC WIRES AND EXTRUDED PIPES AND TUBES MADE WITH ALLOYS WITH A COPPER BASIS