Home › Drill size chart › #42 drill
#42 drill bit size
#42 drill = .0935 in = 2.38 mm. Closest metric drill: 2.4 mm.
Taps that use a #42 drill
- #4-48 UNF: about 68% thread
Nearby drill sizes
| Drill | Type | Inch | mm | Difference |
|---|---|---|---|---|
| #46 | number | .0810 in | 2.057 | -12.5 thou |
| #45 | number | .0820 in | 2.083 | -11.5 thou |
| #44 | number | .0860 in | 2.184 | -7.5 thou |
| #43 | number | .0890 in | 2.261 | -4.5 thou |
| #42 | number | .0935 in | 2.375 | 0.0 thou |
| 3/32 | fraction | .0938 in | 2.381 | 0.3 thou |
| #41 | number | .0960 in | 2.438 | 2.5 thou |
| #40 | number | .0980 in | 2.489 | 4.5 thou |
| #39 | number | .0995 in | 2.527 | 6.0 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.