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Categories: [Reference Charts]
| Screw Size | Inches | Close Fit Drill Size | Inches | Free Fit Drill Size | Inches | |
|---|---|---|---|---|---|---|
| 000 | 0.0340 | 65 | 0.0350 | 62 | 0.0380 | |
| 00 | 0.0440 | 3/64 | 0.0469 | 55 | 0.0520 | |
| 0 | 0.0600 | 52 | 0.0635 | 50 | 0.0700 | |
| 1 | 0.0730 | 48 | 0.0760 | 46 | 0.0810 | |
| 2 | 0.0860 | 43 | 0.0890 | 41 | 0.0960 | |
| 3 | 0.0990 | 37 | 0.1040 | 35 | 0.1100 | |
| 4 | 0.1120 | 32 | 0.1160 | 30 | 0.1285 | |
| 5 | 0.1250 | 30 | 0.1285 | 29 | 0.1360 | |
| 6 | 0.1380 | 27 | 0.1440 | 25 | 0.1495 | |
| 8 | 0.1640 | 18 | 0.1695 | 16 | 0.1770 | |
| 10 | 0.1900 | 9 | 0.1960 | 7 | 0.2010 | |
| 12 | 0.2160 | 2 | 0.2210 | 1 | 0.2280 | |
| 1/4 | 0.2500 | F | 0.2570 | H | 0.2660 | |
| 5/16 | 0.3125 | P | 0.3230 | Q | 0.3320 | |
| 3/8 | 0.3750 | W | 0.3860 | X | 0.3970 | |
| 7/16 | 0.4375 | 29/64 | 0.4531 | 15/32 | 0.4687 | |
| 1/2 | 0.5000 | 33/64 | 0.5156 | 17/32 | 0.5312 | |
| 9/16 | 0.5625 | 37/64 | 0.5781 | 19/32 | 0.5938 | |
| 5/8 | 0.6250 | 41/64 | 0.6406 | 21/32 | 0.6562 | |
| 11/16 | 0.6875 | 45/64 | 0.7031 | 23/32 | 0.6562 | |
| 3/4 | 0.7500 | 49/64 | 0.7656 | 25/32 | 0.7812 | |
| 13/16 | 0.8125 | 53/64 | 0.8281 | 27/32 | 0.8438 | |
| 7/8 | 0.8750 | 57/64 | 0.8906 | 29/32 | 0.9062 | |
| 15/16 | 0.9375 | 61/64 | 0.9531 | 31/32 | 0.9688 | |
| 1 | 1.0000 | 1-1/64 | 1.0156 | 1-1/32 | 1.0313 |