| Manufacturer Part Number | L421E420 |
| Thread Size (Inch) | 1/4" |
| Threads per Inch (TPI) | 28 |
| Thread Series | UN |
| Thread Size (Decimal Inch) | 0.180" |
| Thread Size (mm) | 4.57mm |
| Shank Diameter (Inch) | 3/16" |
| Shank Diameter (Decimal Inch) | 0.187" |
| Shank Diameter (mm) | 4.75mm |
| Thread Length (Decimal Inch) | 0.500" |
| Thread Length (mm) | 12.70mm |
| Overall Length (Inch) | 2-1/2" |
| Overall Length (Decimal Inch) | 2.500" |
| Overall Length (mm) | 63.50mm |
| Shank Type | Plain |
| Helix Angle (Degree) | 15 Degree |
| Number of Flutes | 3 |
| Coating | TiAIN |
| Material | Carbide |
| Application | P,K,N |
| Series | L421E |
| Cutting Direction | Right Hand |
| Product Type | Helical Flute Thread Mill |
714.897.1700
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