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#17 drill bit size
#17 drill = .1730 in = 4.39 mm. Closest metric drill: 4.4 mm.
Nearby drill sizes
| Drill | Type | Inch | mm | Difference |
|---|---|---|---|---|
| #20 | number | .1610 in | 4.089 | -12.0 thou |
| #19 | number | .1660 in | 4.216 | -7.0 thou |
| #18 | number | .1695 in | 4.305 | -3.5 thou |
| 11/64 | fraction | .1719 in | 4.366 | -1.1 thou |
| #17 | number | .1730 in | 4.394 | 0.0 thou |
| #16 | number | .1770 in | 4.496 | 4.0 thou |
| #15 | number | .1800 in | 4.572 | 7.0 thou |
| #14 | number | .1820 in | 4.623 | 9.0 thou |
| #13 | number | .1850 in | 4.699 | 12.0 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.