OSG - 1/4-20 UNC 3 Flute Modified Bottoming Spiral Flute Tap - Vanadium High Speed Steel, Oxide Finish, 2-1/2" OAL, Right Hand Flute, Right Hand Thread, Oversize, H7, Series 290
Item #: 79452926
Brand: OSG
Model #: 2940201
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.
Vanadium High Speed Steel (HSSE) is made of high speed steel, carbon, vanadium carbide and other alloys to increase abrasive wear resistance and toughness. It is commonly used in general applications on stainless steels and high silicon aluminums.
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 | Modified Bottoming |
| Thread Limit | H7 |
| Number of Flutes | 3 |
| Material | Vanadium High Speed Steel |
| Finish/Coating | Oxide |
| Thread Direction | Right Hand |
| Flute Direction | Right Hand |
| Through Coolant | NonThrough Coolant |
| Overall Length (Inch) | 2-1/2 |
| Helix Angle | 45 |
| Thread Standard | UNC |
| Material Grade | 3% Vanadium HSS |
| Oversize | Yes |
| Thread Length (Inch) | 1 |
| Flute Type | Fast Spiral |
| Series/List | 290 |
| Shank Diameter (Decimal Inch) | 0.2550 |
| Material Application | Alloy Steel; Carbon Steel; Cast Iron; Die Steel; Hardened Steel; Stainless Steel |
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