knurled nut with collar

例句：

1. 1. This tool has a knurled nut that makes it easy to turn.
   这个工具有一个带扣环的螺母，使得它容易转动。
2. 2.The engineer used a knurled nut to secure the bolts in place.
   工程师使用一个带扣环的螺母来固定螺栓到位。
3. 3. The knurled nut with its unique design is highly sought after by collectors.
   带有独特设计的带扣环螺母非常受收藏家们的青睐。