摘要 |
<p>The device has a screw with a screw head (11) and a threaded pin (14), which is integrally formed at the screw. A casing receives the screw, and a casing part comprises an internal screw thread. The screw and the casing have a through hole along its rotation axis. The through hole opens out into a boring (12) provided in the screw head, so that a passage channel for accommodating a ball thread is formed in the screwed condition.</p> |