| Year | 1966 |
| Date | 04-Mar |
| Volume | 132 |
| Issue | 3,292 |
| Page | 220 |
| Category | For the Schools |
| Part | 4 |
| Title | Screw Threads |
| Author | Duplex |
| Notes | Tapping. Alignment of the tap, tapping in machines, Rawlplug's De-Speeder, using a tap wrench in the machine, tapping attachments, tapping machines, tapping thin material |