wrench-head bolt

例句：

1. 1.The wrench-head bolt was the only thing holding the door shut.
   扳手头螺栓是把门关上的唯一东西。
2. 2.He tightened the wrench-head bolt on the hinge and made sure it was secure.
   他拧紧了铰链上的扳手头螺栓，确保它牢固。
3. 3. The wrench-head bolt was rusted, so he had to replace it.
   扳手头螺栓生锈了，所以他不得不更换它。