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Thread Cutting Screw (TCS)
These screws have standard coarse threads and a tip that can cut its own threads into metal. The tip cuts threads into metal similar to how a tap cuts threads. A pre-drilled hole is required for installation.
Types
Type 1: Single narrow cutting edge
Type 23: Single cutting edge with a wide cavity for added chip clearing capability
Type F: Multiple cutting edges for heavier gage metal
Dimensions
| Dia. | Thread | Drill Bit | Rec. Thickness |
|---|---|---|---|
| 2 | 56 | 49 | 0.0760 - 0.0800 |
| 3 | 48 | 46 | 0.0920 - 0.0960 |
| 4 | 40 | 41 | 0.1070 - 0.1110 |
| 5 | 40 | 37 | 0.1070 - 0.1110 |
| 6 | 32 | 31 | 0.1385 - 0.1425 |
| 8 | 32 | 26 | 0.1845 - 0.1905 |
| 10 | 24 | 17 | 0.1845 - 0.1905 |
| 10 | 32 | 16 | 0.1845 - 0.1905 |
| 12 | 24 | 8 | 0.1845 - 0.1905 |
| 1/4 | 20 | 1 | 0.2470 - 0.2530 |
| 5/16 | 18 | L | 0.3095 - 0.3155 |
| 3/8 | 16 | T | 0.3720 - 0.3780 |
| 1/2 | 13 | 29/64 | 0.4430 - 0.4710 |