Union Butterfield - 1/4-28 UNF 3 Flute 2B Modified Bottoming Spiral Flute Tap - Powdered Metal, TiCN Finish, 3.15" OAL, Right Hand Flute, Right Hand Thread, Series 1678
Item #: 66376500
Brand: Union Butterfield
Model #: 1717512
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.
Powdered Metal (PM) is tougher and more cost effective than solid carbide. It is commonly used on highly abrasive materials including high silicon aluminums.
Titanium carbonitride (TiCN) is harder and more wear resistant than TiN. It is commonly used on stainless steels, cast iron and aluminum alloys.
Fast Spiral Flutes with 40-53 degree angles are suitable for ductile materials like aluminum and copper; medium to high carbon steels and free machining stainless steels.
| Product Specifications | |
|---|---|
| Thread Size (Inch) | 1/4-28 |
| Chamfer | Modified Bottoming |
| Class of Fit | 2B |
| Number of Flutes | 3 |
| Material | Powdered Metal |
| Finish/Coating | TiCN |
| Thread Direction | Right Hand |
| Flute Direction | Right Hand |
| Through Coolant | Through Coolant |
| Overall Length (Decimal Inch) | 3.1500 |
| Helix Angle | 50 |
| Thread Standard | UNF |
| Oversize | No |
| Thread Length (Decimal Inch) | 0.4330 |
| Flute Type | Fast Spiral |
| Series/List | 1678 |
| Tapping Depth (Decimal Inch) | 1.1810 |
| Shank Diameter (Decimal Inch) | 0.2550 |
| Material Application | Alloy Steel; Aluminum; Aluminum Alloys; Brass; Carbon Steel; Copper; Copper Alloys; Free Machining Stainless Steel; Hardened Steel; Magnesium; Nickel; Nickel Alloys; Stainless Steel; Steel; Structural Steel; Titanium; Titanium Alloys |
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