| 摘要 |
<p>A bolt-hole cap for sealing the bolt hole of a rail includes a top face and a bottom face from which multiple protrusions extend. Each protrusion extends radially from inner portion toward outer portion of the bolt-hole cap. Each protrusion has two side faces and an end face connected between the two side faces. The end face has a first width. When the bolt-hole cap is inserted into a bolt hole and the top face of the bolt-hole cap is in flush with the top face of the rail, the end face of each of the protrusions contacts the bolt in the bolt hole. The protrusions are plastically deformed toward the side faces and the end face has a second width which is wider than the first width, so that the bolt-hole cap has sufficient strength to keep the top thereof flushing the top of the rail.</p> |
