| 摘要 |
A pair of socket elements (10, 12) are provided for mounting onto adjacent nuts or bolt heads (not shown) and a connector element (20) is provided for mounting onto the twa socket elements (10, 12) to hold them together. Each socket element (10, 12) comprises a body provided with a bore (14) having multiple grooves or angles by means of which it can be non-rotatably mounted onto the nut (or bolt head) in a selected one of a plurality of positions. Each body also has external grooves (13). The connector element (20) comprises a pair of annular bodies (22, 32) which are permanently connected to each other. Each annular body (22, 32) has internal grooves enabling it to be releasably and non-rotatably mounted onto the respective socket elements (10 or 12) in a selected one of a plurality of positions, but once so mounted tending to inhibit rotation of the respective socket elements. The annular bodies (22, 32) of the connector element (20) may be attached directly to each other or by way of a link which is a straight strip, or of U-shape (24) of V-shape (Figs 3 and 4) or some other shape. One or both of the socket elements may be axially extended so that a portion projects axially when the connector element is fitted over. A further indicator element may then be provided which is non-rotatably mounted onto this axially projecting portion so as to indicate any rotation of that socket element relative to a reference position (Figs 3 and 4).
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