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- Inch
- 3 Pieces
- 1/4-28 UNF Thread Size & Type
- Taper-Plug-Bottoming Chamfer Type
- HSS Material
| Spiral Point | No |
| Shank Square Width - Metric | 4.85 mm |
| Direction of Cut | Right Hand |
| Ground Threads | Yes |
| Thread Type | UNF |
| Truncated Threads | No |
| Diameter - Fraction | 1/4 in |
| Thread Size | 1/4 in |
| Shank Size - Metric | 6.48 mm |
| Thread Length - Metric | 25.4 mm |
| Shank Square Length - Metric | 7.94 mm |
| Diameter - Decimal | 0.25 in |
| Shank Square Length | 0.3125 in |
| Thread Size - Metric | 6.35 mm |
| Thread Limit | H3 |
| Shank Square Width | 0.191 in |
| Diameter - Wire | E |
| Thread Size - Decimal | 0.25 in |
| Thread Per Inch | 28 |
| Shank End Feature | Square |
| Blank Construction | USCTI Table 302 |
| No. of Flutes | 4 |
| Interrupted Thread | No |
| Tap Type | Hand |
| Weight | 0.0 LB |
