Thread prep
1/4-20 Tap Drill
Tap drill and clearance reference for 1/4-20.
75% thread engagementUNC standard
Tap drill#7
Decimal0.201 in / 5.11 mm
| Fit type | Clearance hole |
|---|---|
| Close fit | 0.257 in |
| Normal fit | 0.266 in |
| Loose fit | 0.281 in |
Thread prep
Tap drill and clearance reference for 1/4-20.
| Fit type | Clearance hole |
|---|---|
| Close fit | 0.257 in |
| Normal fit | 0.266 in |
| Loose fit | 0.281 in |