| 摘要 |
<p>The screw (1) i.e. concrete screw (2), has a thread (6) formed on a part of a screw shank (5), and a longitudinal groove (9) formed on a front section (7) of the screw, starting at an end (4) of the screw on the screw shank. The longitudinal groove is delimited on the screw shank by two longitudinal sides (10) running radially relative to a longitudinal axis (8) of the screw. The longitudinal sides are oriented at an angle between 1 and 20 degrees relative to a straight line running parallel to the longitudinal axis. The longitudinal groove is helically configured on the screw shank. The screw is partially made of metal such as steel, or fiber-reinforced plastic or fiberglass. An independent claim is also included for a method for producing a thread-tapping screw.</p> |
