Bed casters of metal; Door fittings of metal; Eye bolts; Fittings of metal for compressed air hoses; Grease nipples; Hinges of metal; Knobs of metal; Metal gate stops; Metal hardware, namely, washers; Metal junctions for pipes; Metal water pipes; Metallic drain traps; Tubes of metal; Valves of metal, other than parts of machines; Water-pipe valves of metal