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#38 drill bit size
#38 drill = .1015 in = 2.58 mm. Closest metric drill: 2.6 mm.
Taps that use a #38 drill
- #5-40 UNC: about 72% thread
Nearby drill sizes
| Drill | Type | Inch | mm | Difference |
|---|---|---|---|---|
| 3/32 | fraction | .0938 in | 2.381 | -7.8 thou |
| #41 | number | .0960 in | 2.438 | -5.5 thou |
| #40 | number | .0980 in | 2.489 | -3.5 thou |
| #39 | number | .0995 in | 2.527 | -2.0 thou |
| #38 | number | .1015 in | 2.578 | 0.0 thou |
| #37 | number | .1040 in | 2.642 | 2.5 thou |
| #36 | number | .1065 in | 2.705 | 5.0 thou |
| 7/64 | fraction | .1094 in | 2.778 | 7.9 thou |
| #35 | number | .1100 in | 2.794 | 8.5 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.