Find a Service Center
- Inch
- 3 Pieces
- 1/4-28 UNF Thread Size & Type
- Taper-Plug-Bottoming Chamfer Type
- HSS Material
features
- Ground threads are made from high speed steel
- Most common general-purpose taps used in the industry
includes
- One each - taper, plug, and bottoming
- A set of all three is recommended when tapping to the bottom of a blind hole.
| Operation Type | Blind Hole, Thru-Hole |
| Interrupted Thread | No |
| Thread Per Inch | 28 |
| Shank Size - Metric | 6.48 mm |
| Shank Square Width | 0.191 in |
| Overall Length | 2.5 in |
| Pitch Dia. | H3 |
| Blank Construction | USCTI Table 302 |
| Diameter - Fraction | 1/4 in |
| Thread Pitch | N/A |
| Tap Type | Hand |
| Diameter - Wire | E |
| Threads per Inch | 28 |
| Direction of Cut | Right Hand |
| Tap Size | 1/4 in |
| Ground Threads | Yes |
| Diameter - Decimal | 0.25 in |
| Truncated Threads | No |
| Chamfer Type | Taper, Plug, Bottoming |
| Shank Square Length - Metric | 7.94 mm |
| Thread Limit | H3 |
| Thread Type | UNF |
| Thread Size - Metric | 6.35 mm |
| Thread Size - Decimal | 0.25 in |
| Shank Square Width - Metric | 4.85 mm |
| Shank End Feature | Square |
| No. of Flutes | 4 |
| Thread Length - Metric | 16 mm |
| Thread Creation | Thread Cutting |
| Spiral Point | No |
| Shank Square Length | 0.3125 in |
| Thread Size | 1/4 in |
| Weight | 0.1 LB |
