Walter-Prototyp - 1/4-28 UNF, 3 Flute, 25° Helix, Modified Bottoming Chamfer, Nitride Finish, Cobalt Spiral Flute STI Tap - Right Hand Flute, 2-23/32" OAL, 0.318" Shank Diam, 3/4" Thread Length, 3B Class of Fit, Series A234000
Item #: 36331627
Brand: Walter-Prototyp
Model #: 5080709
Exact Tooling IR#: 04
Features and Benefits
Modified bottoming chamfers are similar to bottoming chamfers, but they are longer and have more teeth. They are used for threading blind holes and have 2 to 2-1/2 threads.
Nitride is a thin, hard shell coating that supports the surface hardness of high speed tools. It is commonly used on ferrous and non-ferrous metals including aluminum and cast iron.
| Product Specifications | |
|---|---|
| Thread Size (Inch) | 1/4-28 |
| Class of Fit | 3B |
| Number of Flutes | 3 |
| Chamfer | Modified Bottoming |
| Finish/Coating | Nitride |
| Overall Length (Decimal Inch) | 2.7188 |
| Overall Length (Inch) | 2-23/32 |
| Overall Length (mm) | 69.06 |
| Helix Angle | 25 |
| Thread Standard | UNF |
| Material | Cobalt |
| Flute Direction | Right Hand |
| Thread Length (Decimal Inch) | 0.7480 |
| Thread Length (mm) | 19.00 |
| Series/List | A234000 |
| Shank Diameter (Decimal Inch) | 0.3180 |
| Shank Diameter (mm) | 8.08 |
| Material Application | Aluminum; Cast Steel; Cobalt Alloys; Grey Cast Iron; Iron Alloys; Nickel Alloys; Non-Ferrous Metals; Spheroidal Cast Iron; Steel; Titanium; Titanium Alloys; Vermicular Cast Iron |
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