5/8-11 Tap Drill Size
Use a 17/32" drill for a 5/8-11 UNC tap — .5312" (13.49 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 |
|---|---|---|
| 9/16-18 UNF | 33/64 | .5156 |
| 5/8-18 UNF | 37/64 | .5781 |
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.