| 摘要 |
<p>A locking device for a rotational based fastener for fastening an object to a substrate said device comprising a washer (1) adapted for placement between said fastener head (2) and said object (3) and a locking plate (4) adapted for removable engagement to said fastener head and for cooperation therewith to prevent relative rotation of said locking plate and said fastener head wherein said locking plate and said washer are connected by a common portion being an integral foldable tab (5) wherein said foldable tab is flexible but substantially non-elastic and said locking plate has a first aperture (8) adapted to receive the shank of said fastener such that the fastener head will abut the washer face and upon tightening draw said washer into tight continuous contact with said substrate and wherein said locking plate is larger than said fastener head and has a second aperture (9) of smaller or equal size than said fastener head, and wherein said locking plate includes a swagable portion (11) positioned near the perimeter of said second aperture and configured to bridge said fastener head when said locking plate is swaged over said fastener.</p> |
