| Year | 1980 |
| Date | 15-Feb |
| Volume | 146 |
| Issue | 3,627 |
| Page | 219 |
| Category | Workshop |
| Part | |
| Title | Screw Threads for Model Engineers |
| Author | George Thomas |
| Notes | Comparison of BA and ISO threads, constant pitch Imperial systems for M.E.'s, comparison of Imperial and ISO pitches, proposed metric M.E. series |