| Manufacturer Part Number | B1543 |
| Diameter (Decimal Inch) | 0.4375" |
| Diameter (mm) | 11.11mm |
| Overall Length (Decimal Inch) | 3.1600" |
| Overall Length (mm) | 80.26mm |
| Thread Length (Decimal Inch) | 0.4720" |
| Thread Length (mm) | 11.99mm |
| Square Length (Decimal Inch) | 0.4100" |
| Square Length (mm) | 10.41mm |
| Shank Diameter (Decimal Inch) | 0.3230" |
| Shank Diameter (mm) | 8.20mm |
| Square Size (Decimal Inch) | 0.2420" |
| Square Size (mm) | 6.15mm |
| Neck Diameter (Decimal Inch) | 0.3110" |
| Neck Diameter (mm) | 7.90mm |
| Drill Size (Decimal Inch) | 0.3920" |
| Drill Size (mm) | 9.96mm |
| Useable Length (Decimal Inch) | 1.8500" |
| Useable Length (mm) | 46.99mm |
| Thread Diameter (Inch) | 7/16" |
| Threads Per Inch | 20 TPI |
| Number of Flutes | 3 |
| Pitch Limit | H3 |
| 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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