| 摘要 |
An anti-loosening nail exclusively for wood includes an annular fix plate, a recess formed on an upper surface of the annular fix plate, and a hollow post extending down from the center section of the fix plate. The recess communicates with the center hole of the hollow post, and a washer is placed in the recess. When a screw is inserted in the center hole of the post, it screws with female threads formed in an upper portion of the center hole, and further engages with the washer to prevent the screw from loosen off of itself.
|
