| 摘要 |
For the purpose of attaching components such as frames, door frames and window frames at a defined, but variable and adjustable, distance from a fixed surface, a spacer screw (1) is proposed with which improved extraction and withdrawal values can be achieved and in which there is no need for special cutting edges, without the risk arising that the surface of the component to be attached is damaged by material being dislodged. The spacer screw (1) according to the invention has two thread sections (A, C), which are separated by an unthreaded cylindrical section (B), the nominal diameter (N1) of the screw being greater in the region of the rear thread section (C) than in the region of the remaining screw sections, and the screw tapering conically from the rear thread section (C) to the unthreaded section (B), and is characterised in that the thread of the rear thread section (C) is cut deeper, and has steeper and more acute thread flanks than the thread of the front thread section (A). <IMAGE> |
