| 摘要 |
A three-part fastening element having, as the first part or element, a first sleeve which is slit axially at least once, preferably a number of times, at one of its two ends and is thus radially spreadable and has a cylindrical basic shape and, at both ends, stop regions projecting radially from an approximately uniform cylindrical outer circumferential surface. The second part or element comprising a second sleeve which can be introduced into said first sleeve as a spreading mandrel for the radially spreadable end region of the first sleeve and has a radially projecting collar at its end remote from the spreadable end of the first sleeve. The second part or element intended for fastening a first component, by way of the first sleeve, on a wall provided with an opening for receiving the spreadable end of the first sleeve. The third element comprising a cap with a spreading pin which extends from the latter that is intended for introduction into the spreading mandrel which is the second sleeve. The third element intended for clamping in a second component between the first and second sleeves, on the one hand, and the cap, on the other hand. The improvement comprising the cap also having a fastening hook, preferably integrally formed on the cap, at its end remote from the cap, the spreading pin is provided with radially spread, elastically deformable spreading tongues with barbs, it being the case that, with the spreading pin inserted to the full extent in the first and second sleeves, the barbs project radially out of the two sleeves in a withdrawal-blocking manner. |
