Fittings of metal for compressed air hoses; Manually operated metal valves; Metal adapters for use with hydraulic and pneumatic systems; Metal couplings for use with hydraulic and pneumatic systems; Metal fasteners, namely, bolts, nails, rivets, screws; Metal flanges; Metal nuts; Metal pipe couplings and joints; Metal pipes and metal fittings therefor; Metal strapping or tie downs; Metallic drain traps; Ring-shaped fittings of metal; Valves of metal other than parts of machines including thos...