Common metals and their alloys including stainless steel; Elbows of metal for pipes; Manually operated metal valves; Metal elbows for pipes; Metal hexagon head bolts; Metal hexes; Metallic flanges; Metal pipe clips; Metal pipe connectors; Metal pipe couplings and joints; Metal thread adapters for use with hydraulic and pneumatic systems; Metal valves not being parts of machines; Pipe coupling of metal; Self-tapping bushings of metal; Stainless steel pipes; Structural joint connectors of metal...