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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.  

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

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

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.  

The distance a screw thread advances axially in one turn.  

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

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

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

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

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.,…