Balls of steel; Couplings and joints of metal for pipes; Fasteners, namely, metal bars and chains; Foundry molds of metal; Lock bolts of metal; Mechanical fastening elements of metal; Metal bolts; Metal fasteners, namely, bolts, nails, rivets and screws; Metal hardware, namely, nuts; Metal hardware, namely, springs; Metallic moulds for metal casting; Metal nuts; Metal threaded fasteners; Nuts of metal; Pipe muffs of metal