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- Inch
- 1/4-28 UNF Thread Size & Type
- Semi-Bottoming Chamfer Type
- HSS-E Material
- Steam Oxide over Nitride Coating
| Tap Size | 1/4 in |
| Pitch Dia. | H3 |
| Thread Length - Metric | 15.88 mm |
| Chamfer Type | Semi-Bottoming |
| Diameter - Wire | E |
| Finish | X-20 Treated |
| Thread Length | 0.625 in |
| Thread Creation | Thread Cutting |
| Thread Size & Type | 1/4-28 UNF |
| Threads per Inch | 28 |
| Interrupted Thread | No |
| Thread Limit | H3 |
| Tap Type | Machine |
| Thread Size | 1/4 in |
| Shank Size - Metric | 6.48 mm |
| Thread Size - Decimal | 0.25 in |
| Shank End Feature | Square |
| Shank Square Width - Metric | 4.85 mm |
| Shank Square Length - Metric | 7.94 mm |
| Ground Threads | Yes |
| No. of Flutes | 4 |
| Thread Per Inch | 28 |
| Thread Size - Metric | 6.35 mm |
| Blank Construction | USCTI Table 302A |
| Overall Length | 2.5 in |
| Direction of Cut | Right Hand |
| Shank Square Width | 0.191 in |
| Operation Type | Blind Hole, Thru-Hole |
| Thread Pitch | N/A |
| Truncated Threads | No |
| Thread Type | UNF |
| Diameter - Decimal | 0.25 in |
| Diameter - Fraction | 1/4 in |
| Shank Square Length | 0.3125 in |
| Material | HSS-E |
| Spiral Point | No |
| Thread Tolerance | 2B |
| Weight | 0.034 LB |
