| 摘要 |
A fastener device for adjustably fitting a frame in a wall opening includes a sleeve which has an external screw thread which meshes with a corresponding internal screw thread on the frame. The sleeve includes a sleeve-turning element which enables the sleeve to be turned with the aid of a tool in gripping engagement therewith. The fastener device includes a radially expandable mounting plug whose rear end is provided with an external screw thread which meshes with a corresponding internal screw thread in the sleeve. The rear end of the mounting plug is provided with a plug-turning element which can be engaged by a tool to enable the plug to be turned in relation to the sleeve. The mounting plug is designed conventionally in a manner which will enable it to be fixed in a pre-drilled hole in the wall, by driving a fastener element through an axial passage in the plug, so as to expand the end-part of the plug located in the pre-drilled hole. The inner screw thread and outer screw thread of the sleeve have mutually different pitches. |
