| 摘要 |
The invention relates to a bolt (1) with restrained unscrewing composed of a screw (2) and a nut (3), said screw (2) or said nut (3) comprising, in the axial direction, at least three stepped portions of continuous thread (4), namely an introduction portion (5) for introducing the screw (2) into the nut (3), a restraining portion (6) and an intermediate portion (7) linking the introduction portion (5) to the restraining portion (6), characterised in that said restraining portion (6) has a thread diameter (41) that is constant and different from the thread diameter (42) of the introduction portion (5). |
