| 摘要 |
<p>Fastener means consisting of a plastic dowel and a fastening screw, the dowel having a slot (2) originating from its front end and running over a part of its length, and a longitudinal hole (3) into which can be screwed the fastening screw, which is provided with a round thread. In order to design the fastener means for ceiling installation on the one hand and for soft building materials on the other hand, the dowel has an internal thread (4), the inclination and profile of which are matched to the round thread of the fastening screw, and the external and core size of which is smaller than the corresponding size of the round thread of the fastening screw. <IMAGE></p> |
