| Manufacturer Part Number | B1585 |
| Diameter (Decimal Inch) | 0.5000" |
| Diameter (mm) | 12.70mm |
| Overall Length (Decimal Inch) | 3.3800" |
| Overall Length (mm) | 85.85mm |
| Thread Length (Decimal Inch) | 0.4720" |
| Thread Length (mm) | 11.99mm |
| Square Length (Decimal Inch) | 0.4400" |
| Square Length (mm) | 11.18mm |
| Shank Diameter (Decimal Inch) | 0.3670" |
| Shank Diameter (mm) | 9.32mm |
| Square Size (Decimal Inch) | 0.2750" |
| Square Size (mm) | 6.99mm |
| Neck Diameter (Decimal Inch) | 0.3540" |
| Neck Diameter (mm) | 8.99mm |
| Drill Size (Decimal Inch) | 0.4545" |
| Drill Size (mm) | 11.55mm |
| Useable Length (Decimal Inch) | 2.0670" |
| Useable Length (mm) | 52.50mm |
| Thread Diameter (Inch) | 1/2" |
| Threads Per Inch | 20 TPI |
| Number of Flutes | 3 |
| Pitch Limit | H5 |
| Series | B1 |
| Helix Angle | 45 Degree |
| Thread Series | UNF |
| Chamfer Type | Modified Bottoming |
| Chamfer Length | 2P-3P |
| Finish | Bright |
| Material | HSSE-V3 |
| Blank Standard | 302A |
| Length/Diameter | 2.5xD |
| Shank Type | Square |
| Tap Type | Spiral Flute Tap |
714.897.1700
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