| Manufacturer Part Number | B1904 |
| Diameter (Decimal Inch) | 1.3750" |
| Diameter (mm) | 34.93mm |
| Overall Length (Decimal Inch) | 6.0600" |
| Overall Length (mm) | 153.92mm |
| Thread Length (Decimal Inch) | 1.1810" |
| Thread Length (mm) | 30.00mm |
| Square Length (Decimal Inch) | 1.0600" |
| Square Length (mm) | 26.92mm |
| Shank Diameter (Decimal Inch) | 1.1080" |
| Shank Diameter (mm) | 28.14mm |
| Square Size (Decimal Inch) | 0.8310" |
| Square Size (mm) | 21.11mm |
| Neck Diameter (Decimal Inch) | 1.0890" |
| Neck Diameter (mm) | 27.66mm |
| Drill Size (Decimal Inch) | 1.2235" |
| Drill Size (mm) | 31.08mm |
| Useable Length (Decimal Inch) | 3.5830" |
| Useable Length (mm) | 91.01mm |
| Thread Diameter (Inch) | 1-3/8" |
| Threads Per Inch | 6 TPI |
| Number of Flutes | 4 |
| Pitch Limit | H4 |
| Series | B1 |
| Helix Angle | 45 Degree |
| Thread Series | UNC |
| 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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