Threaded pipe couplings of metal; Metal threaded bolts; Reinforcing joints of metal for concrete framework; Threaded bars of metal for construction; Reinforcing steel rods and anchor bolts of metal; Reinforcing bar couplings of metal for concrete framework; Mechanical splices for steel rods in the nature of structural joint connectors of metal; Metal construction materials, namely frames of metal for building; Metal sleeves, namely metal expanding sleeves for affixing screws; Metal couplings ...