OSG - 1/4-28 UNF, 3 Flute, 45° Helix, Semi-Bottoming Chamfer, V Finish, Powdered Metal Spiral Flute STI Tap - Right Hand Flute, 2-23/32" OAL, 0.318" Shank Diam, 1-1/8" Thread Length, 3B Class of Fit, Series 315
Item #: 49148216
Brand: OSG
Model #: 1716508
Exact Tooling IR#: 04
Features and Benefits
Semi-bottoming chamfers are used for blind holes. They have 3 to 3-1/2 threads.
V is a multi-layered TiCN coating that is harder and has greater wear resistance than TiN. It is used for applications in cast iron, steel, stainless steel, nickel alloys and aluminum. V is a proprietary coating exclusive to OSG Tap and Die, Inc.
| Product Specifications | |
|---|---|
| Thread Size (Inch) | 1/4-28 |
| Class of Fit | 3B |
| Thread Limit | H2 |
| Number of Flutes | 3 |
| Chamfer | Semi-Bottoming |
| Finish/Coating | V |
| Overall Length (Inch) | 2-23/32 |
| Helix Angle | 45 |
| Thread Standard | UNF |
| Material | Powdered Metal |
| Flute Direction | Right Hand |
| Thread Length (Inch) | 1-1/8 |
| Series/List | 315 |
| Shank Diameter (Decimal Inch) | 0.3180 |
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