Walter-Prototyp - 1/4-18 NPT, 15° Helix, 4 Flutes, Modified Bottoming Chamfer, Oxide Finish, Cobalt, Spiral Flute Pipe Tap - Right Hand Flute, 9/16" Shank Diam, 0.787" Thread Length, 7/16" Square Size, Series A254602
Item #: 43552223
Brand: Walter-Prototyp
Model #: 5081171
Exact Tooling IR#: 04
Features and Benefits
NPT (National Pipe Taper) refers to American National Standard Taper Pipe Threads. They are commonly used for general purpose applications and require a sealant.
Cobalt is harder than high speed steel and provides better wear resistance. It is commonly used on high tensile alloys.
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.
Modified bottoming chamfers are similar to bottoming chamfers, but they are longer and have more teeth. They are used for threading to the bottom of blind holes and have 2 to 2-1/2 threads.
| Product Specifications | |
|---|---|
| Thread Size (Inch) | 1/4-18 |
| Thread Standard | NPT |
| Material | Cobalt |
| Finish/Coating | Oxide |
| Number of Flutes | 4 |
| Helix Angle | 15 |
| Material Grade | M35 |
| Thread Length (Decimal Inch) | 0.7870 |
| Series/List | A254602 |
| Shank Diameter (Decimal Inch) | 0.5630 |
| Square Length (Inch) | 7/16 |
| Square Size (Decimal Inch) | 0.4210 |
| Material Application | Cast Steel; Cobalt Alloys; Iron Alloys; Nickel Alloys; Steel; Titanium; Titanium Alloys |
| Flute Direction | Right Hand |
| Chamfer | Modified Bottoming |
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