OSG - 1/4-28 UNF 3 Flute H3 Oxide Finish Vanadium High Speed Steel Spiral Flute Extension Tap - Bottoming Chamfer, 6" OAL, 1-1/2" Thread Length, 3B Class of Fit, Series 398
Item #: 68572064
Brand: OSG
Model #: 0144201
Exact Tooling IR#: 04
Features and Benefits
Bottoming chamfers are used for threading blind holes to the bottom. They have 1 to 2 threads.
Spiral flute taps are used for threading blind holes in aluminum, brass and softer steels. The flute geometry draws the chips away from the hole where chip disposal may be an issue.
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.
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 on stainless steels and high silicon aluminums.
| Product Specifications | |
|---|---|
| Thread Size | 1/4-28 |
| Overall Length (Inch) | 6 |
| Overall Length (Decimal Inch) | 6.000 |
| Chamfer | Bottoming |
| Thread Limit | H3 |
| Class of Fit | 3B |
| Number of Flutes | 3 |
| Tap Type | Spiral Flute |
| Finish/Coating | Oxide |
| Flute Direction | Right Hand |
| Thread Standard | UNF |
| Material | Vanadium High Speed Steel |
| Thread Length (Inch) | 1-1/2 |
| Thread Direction | Right Hand |
| Shank Diameter (Decimal Inch) | 0.2550 |
| Square Size (Decimal Inch) | 0.1910 |
| Material Application | Hardened Steel; Low Carbon Steel; Medium Carbon Steel; Stainless Steel |
| Flute Direction | Right Hand |
| Series/List | 398 |
| Neck Length (Decimal Inch) | 1.4960 |
| Shank Size Type | Reduced |
2% Off All Online Orders
Use Code: 2%OFF
Best Price Guarantee - Email Us A Better Published Price and We'll Beat It