Hydril Threads

     Stewart Tubular Products is licensed to cut the
     Following Hydril (TenarisHydril) Threads.

     2-Step Threads:
          TenarisHydril CS, CSCB
          TenarisHydril PH6, PH6CB and PH4, PH4CB
     
     Wedge Series 500 Threads:
          TenarisHydril Wedge 501
          TenarisHydril Wedge 503
          TenarisHydril Wedge 511
          TenarisHydril Wedge 513
          TenarisHydril Wedge 521
          TenarisHydril Wedge 523
          TenarisHydril Wedge 531
          TenarisHydril Wedge 533
          TenarisHydril Wedge 553
          TenarisHydril Wedge 561
          TenarisHydril Wedge 563