1. 带帽螺栓：nut 螺帽,螺母 | nut bolt 带帽螺栓 | nut cap 螺帽
2. 螺母螺栓：nut and bolt gauge 螺母螺栓规 | nut bolt 螺母螺栓 | nut bolt 螺栓
3. 螺栓：nut bolt 螺母螺栓 | nut bolt 螺栓 | nut buoy 胡桃型浮标
4. 螺钉、带帽螺栓：Nut 螺母 | Nut bolt 螺钉、带帽螺栓 | Nut wrench 螺帽扳手
1. After a close examination, waiters determined that it was a nut from a bolt.