| 摘要 |
<p>A device comprising a threaded plug (1) and related screwdriver (10) comprises a plug (1) having a single-piece structure, with a longitudinal axis (2) of symmetry, a head (5), a body (3) with an outer thread (6) and a tightening flange (4) interposed between the head (5) and the body (3). The head (5) has the shape of a tubular solid (8) projecting from the flange (4) in a direction parallel with the axis (2) of the plug, and comprises an inner cavity (7), laterally surrounded by a non-circular surface (22) of an annular wall (9). The non-circular surface (22) is oblique and diverges from the axis (2) in a direction of travel along the axis from the body (3) to the head (1).The screwdriver (10) comprises a shaped head (12) equipped with surfaces (13) which can be coupled with the non-circular surface (22) with direct contact and automatic taking up of the coupling play.</p> |
