Union Butterfield - 1/4-20 UNC 3 Flute 2B/3B Bottoming Spiral Flute Tap - High Speed Steel, Oxide Finish, 2-1/2" OAL, Right Hand Flute, Right Hand Thread, H3, Series 1591
Item #: 66378704
Brand: Union Butterfield
Model #: 1010954
Exact Tooling IR#: 04
Features and Benefits
Bottoming chamfers are used for threading blind holes. They have 1 to 2 threads.
High Speed Steel (HSS) provides good wear resistance and can be used in general purpose applications for both ferrous and nonferrous materials.
Oxide, also known as black oxide or steam oxide, is a surface treatment that prevents chip building, galling and welding on the workpiece. It is commonly used on low carbons, stainless steel and ferrous metals.
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) | 1/4-20 |
| Chamfer | Bottoming |
| Class of Fit | 2B/3B |
| Thread Limit | H3 |
| Number of Flutes | 3 |
| Material | High Speed Steel |
| Finish/Coating | Oxide |
| Thread Direction | Right Hand |
| Flute Direction | Right Hand |
| Through Coolant | NonThrough Coolant |
| Overall Length (Decimal Inch) | 2.5000 |
| Overall Length (Inch) | 2-1/2 |
| Helix Angle | 40 |
| Thread Standard | UNC |
| Material Grade | M2 |
| Oversize | No |
| Thread Length (Decimal Inch) | 1.0000 |
| Thread Length (Inch) | 1 |
| Flute Type | Fast Spiral |
| Series/List | 1591 |
| Shank Diameter (Decimal Inch) | 0.2550 |
| Square Length (Inch) | 5/16 |
| Material Application | Alloy Steel; Carbon Steel; Free Machining Stainless Steel; Hardened Steel; Nickel Alloys; Stainless Steel; Steel; Structural Steel; Titanium; Titanium Alloys |
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