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#6 drill bit size
#6 drill = .2040 in = 5.18 mm. Closest metric drill: 5.2 mm.
Nearby drill sizes
| Drill | Type | Inch | mm | Difference |
|---|---|---|---|---|
| #9 | number | .1960 in | 4.978 | -8.0 thou |
| #8 | number | .1990 in | 5.055 | -5.0 thou |
| #7 | number | .2010 in | 5.105 | -3.0 thou |
| 13/64 | fraction | .2031 in | 5.159 | -0.9 thou |
| #6 | number | .2040 in | 5.182 | 0.0 thou |
| #5 | number | .2055 in | 5.220 | 1.5 thou |
| #4 | number | .2090 in | 5.309 | 5.0 thou |
| #3 | number | .2130 in | 5.410 | 9.0 thou |
| 7/32 | fraction | .2188 in | 5.556 | 14.8 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.