| 摘要 |
<p>The fixing device has a bolt having a bolt head, and a nut which are made of plastics material. An attachment unit is provided for a turning tool. A shank extended in a longitudinal direction is provided with an external thread. A through-hole extended in longitudinal direction is provided with an internal thread complementary to the external thread. The major diameter of external thread of the bolt is set to a maximum of 15 % larger than the thread root diameter so that the twisting-off of the bolt is prevented, when screwed into the nut.</p> |
