hex head screw

例句：

1. 1.The carpenter used a hexhead screw to tighten the nuts on thedoor hinges.
   木匠用六角头螺丝紧固了门铰链上的螺母。
2. 2. The construction worker replaced the hex head screw with a new one afterthe old one broke.
   建筑工人在旧的六角头螺丝断裂后，换上了一个新的。
3. 3. The engineer tested the hex head screw for strength and durability beforeinstalling it in the machine.
   工程师在安装机器之前，测试了六角头螺丝的强度和耐用性。