| Year | 1949 |
| Date | 29-Dec |
| Volume | 101 |
| Issue | 2,536 |
| Page | 821 |
| Category | In The Workshop |
| Part | 53 |
| Title | Making Screws |
| Author | "Duplex" |
| Notes | Dimensioned working drawing of screw, machining methods, lathe arrangement, a simple form of cross-slide stop, slotting screw heads, round-head screw form tool, for counter-sunk screws |