| Clue | Source | Date |
|---|---|---|
| Hand-tightened fasteners | LA Times Daily | 26 Jun 2025 |
| Fastening devices used with screws (4,4) | ||
| Good snack for a pilot? | New York Times | 31 Aug 2021 |
| Hand-tightened fasteners | LA Times Daily | 14 May 2018 |
| Hand-tightened fasteners | The Washington Post | 14 May 2018 |
| Hand-tightened fasteners |