| 摘要 |
The bolt has several thread sections (3) and a head section (5). This is connected to the threaded sections via a first preferred breakage point (7), and further preferred breakage points (9) between the thread sections, in the form of cross-sectional narrowings. The breaking torque both increases and decreases from the furthest thread section to the head section, so that at least one staged preferred breakage point is formed. |
