UBOLTS
| Date | Clue |
|---|---|
| 2025-02-16 | Horseshoe-shaped pipe fasteners |
| 2022-08-02 | Some letter-shaped hardware |
| 2014-12-28 | Curved fasteners |
| 2006-08-02 | Horseshoe-shaped fasteners |
| 2001-12-27 | Latch pieces |
| 1999-11-06 | Horseshoe-shaped fasteners |
| 1998-04-28 | Heavy steel holders |