3/4-10 Tap Drill Size
Use a 21/32" drill for a 3/4-10 UNC tap — .6562" (16.67 mm).
This drill gives roughly 75% thread, the standard for cut taps. For a form (roll) tap use the larger drill from the tap maker's chart.
Nearby taps
| Tap | Drill | Decimal |
|---|---|---|
| 5/8-18 UNF | 37/64 | .5781 |
| 3/4-16 UNF | 11/16 | .6875 |
Printable PDF version - Tap Drill Chart
Clean letter-size sheet for the toolbox or shop wall. Instant download, $3.49.
Clean letter-size sheet for the toolbox or shop wall. Instant download, $3.49.