OSG - 1/4-20 UNC, 3 Flute, 45° Helix, Semi-Bottoming Chamfer, Oxide Finish, High Speed Steel Spiral Flute STI Tap - Right Hand Flute, 2-23/32" OAL, 0.318" Shank Diam, 1-1/8" Thread Length, 2B Class of Fit, Series 302
Item #: 49148026
Brand: OSG
Model #: 30201101
Exact Tooling IR#: 04
Features and Benefits
Semi-bottoming chamfers are used for blind holes. They have 3 to 3-1/2 threads.
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.
| Product Specifications | |
|---|---|
| Thread Size (Inch) | 1/4-20 |
| Class of Fit | 2B |
| Thread Limit | H3 |
| Number of Flutes | 3 |
| Chamfer | Semi-Bottoming |
| Finish/Coating | Oxide |
| Overall Length (Inch) | 2-23/32 |
| Helix Angle | 45 |
| Thread Standard | UNC |
| Material | High Speed Steel |
| Flute Direction | Right Hand |
| Thread Length (Inch) | 1-1/8 |
| Series/List | 302 |
| Shank Diameter (Decimal Inch) | 0.3180 |