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I drill bit size
I drill = .2720 in = 6.91 mm. Closest metric drill: 6.9 mm.
Taps that use a I drill
- 5/16-24 UNF: about 75% thread
Nearby drill sizes
| Drill | Type | Inch | mm | Difference |
|---|---|---|---|---|
| F | letter | .2570 in | 6.528 | -15.0 thou |
| G | letter | .2610 in | 6.629 | -11.0 thou |
| 17/64 | fraction | .2656 in | 6.747 | -6.4 thou |
| H | letter | .2660 in | 6.756 | -6.0 thou |
| I | letter | .2720 in | 6.909 | 0.0 thou |
| J | letter | .2770 in | 7.036 | 5.0 thou |
| K | letter | .2810 in | 7.137 | 9.0 thou |
| 9/32 | fraction | .2813 in | 7.144 | 9.2 thou |
| L | letter | .2900 in | 7.366 | 18.0 thou |
1 thou = 0.001 in = 0.0254 mm. Drills a few thou apart are usually interchangeable for clearance holes, but not for tap drills or reamer pilots.