collar head screw

例句：

1. 1.The collar head screw is a crucial part of the locking mechanism.
   扣环头部螺丝是锁紧机制的关键部分。
2. 2.The engineer used a special collar head screw to fix the bolt in place.
   工程师使用一种特殊的扣环头部螺丝来固定螺栓到位。
3. 3.The screwdriver was designed to fit the collar head screw, making it easy to remove and replace.
   螺丝刀设计成适合扣环头部螺丝的尺寸，使得拆卸和更换变得容易。