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#12 drill bit size
#12 drill = .1890 in = 4.80 mm. Closest metric drill: 4.8 mm.
Nearby drill sizes
| Drill | Type | Inch | mm | Difference |
|---|---|---|---|---|
| #15 | number | .1800 in | 4.572 | -9.0 thou |
| #14 | number | .1820 in | 4.623 | -7.0 thou |
| #13 | number | .1850 in | 4.699 | -4.0 thou |
| 3/16 | fraction | .1875 in | 4.762 | -1.5 thou |
| #12 | number | .1890 in | 4.801 | 0.0 thou |
| #11 | number | .1910 in | 4.851 | 2.0 thou |
| #10 | number | .1935 in | 4.915 | 4.5 thou |
| #9 | number | .1960 in | 4.978 | 7.0 thou |
| #8 | number | .1990 in | 5.055 | 10.0 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.