Alloys of common metal; Common metals and their alloys including stainless steel; Construction elements made of metal, namely, braces; Construction elements made of metal, namely, supports; Decorative centerpieces of common metal; Mechanical fastening elements of metal; Metal bolts; Metal hardware, namely, springs; Metal pipe connectors; Metal pipe muffs; Pipe coupling of metal; Rivets, cramps and nails of metal; Rotating junctions of metal for pipes; Threaded metal rods; Ventilating ducts of...