6 Articles of metal for use in the drilling of oil wells or gas wells, namely, connectors and fittings of metal for drill strings and pipes for use in the drilling of oil wells or gas wells, connection sleeves of metal for connecting pipes and tubes, junctions of metal for pipes and chains and shackles and rope sockets and mooring lines and tubes, junctions of metal for joining a mast to a piling, junctions of metal for connection to subsea metallic structures, articles of metal for use in the connection of pipes and tubes of metal, subsea riser connectors of metal, subsea structural connectors of metal, subsea structural connectors of metal for pipes and chains and cables and shackles and rope sockets and mooring lines and towers and tubes