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#57 drill bit size
#57 drill = .0430 in = 1.09 mm. Closest metric drill: 1.1 mm.
Nearby drill sizes
| Drill | Type | Inch | mm | Difference |
|---|---|---|---|---|
| #61 | number | .0390 in | 0.991 | -4.0 thou |
| #60 | number | .0400 in | 1.016 | -3.0 thou |
| #59 | number | .0410 in | 1.041 | -2.0 thou |
| #58 | number | .0420 in | 1.067 | -1.0 thou |
| #57 | number | .0430 in | 1.092 | 0.0 thou |
| #56 | number | .0465 in | 1.181 | 3.5 thou |
| 3/64 | fraction | .0469 in | 1.191 | 3.9 thou |
| #55 | number | .0520 in | 1.321 | 9.0 thou |
| #54 | number | .0550 in | 1.397 | 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.