| 摘要 |
A fastening device comprises a bolt (22), a nut (29) with screw threaded engagement with the bolt, and a cup-shaped member (26) which is bolted on the bolt and retained thereon when the nut is in screw threaded engagement with the bolt; the member having an upstanding wall (30) which is arranged to surround partly the nut or the head of the bolt, there being a space between the member (26) and the nut/head of the bolt to permit the latter to be engaged by engaged by a tool for turning the fastening device. Means are provided for impeding access to the space after the fastening device has been turned. The means may comprise an insert (31) or the end of the upstanding wall (30) may be bent over. |
