Junctions of metal for rigid pipes; Valves of metal, other than parts of machines; Water-pipe valves of metal; Brass, unwrought or semi-wrought; Common metals and their alloys, unwrought or semi-wrought; Alloys of common metal; Metal hardware, namely, nuts; Metal profiles made of steel, iron, nickel, titanium and other metals and their alloys; Mechanical fastening elements of metal; Metal pipe fittings for compressed air pipes; Fittings of metal for rigid pipes; Metal junctions for pipes; Man...