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  • Thread run out

    The end section of a threaded shank that is not cut or rolled to full depth providing the transition between the fastener shank and full‐depth threads.  

  • Thread root

    The bottom of the groove between the two flanking surfaces of the thread, whether internal or external.  

  • Thread pitch

    The distance from a point on the screw thread to a corresponding point on the next thread measured parallel to the axis.  

  • Thread path

    The conduit in the internal aspect of a screw access hole which guides the threads of a component. Also, the pathway created by a bone tap in an osteotomy, which directs a dental implant during insertion.  

  • Thread lead

    The distance a screw thread advances axially in one turn.  

  • Thread flank

    The portion of a screw thread that joins the thread root to the screw crest.  

  • Thread depth

    The distance between the major and minor diameter of the thread.  

  • Thread crest

    The prominent part of a thread, whether internal or external.  

  • Thread angle

    The angle between the flanks, measured in an axial plane section.  

  • Thread

    Grooves cut into the walls of a cylinder making it a screw (positive) or a screw channel (negative). These structures guide the insertion and removal of a screw or bolt. Also, the act of inserting a screw or bolt into its receiving channel. A thin piece of cotton, suture, etc. Any thin filamentous structure (e.g.,…

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