The chair is fixedly connected with the nut hammer (cross hole, inclined flat head screws loose) (off) how to do?
You change the nut, just pay attention to the metric (coarse) and the British (fine lines).Screw in the hole on the screw loose, can be around some very thin wax line.
If the thread is damaged, replace it with a new spring washer and tighten it.
If the thread of the bolt is not damaged, add a spring washer near the nut to tighten it.
