| Manufacturer Part Number | M8403 |
| Thread Size (Inch) | 1/4" |
| Thread Size (Decimal Inch) | 0.250" |
| Thread Size (mm) | 6.35mm |
| Threads per Inch (TPI) | 20 |
| Thread Series | UNC |
| Pitch Limit | H3 |
| Chamfer Type | Plug |
| Chamfer Length | 4P-5P |
| Overall Length (Decimal Inch) | 2.500" |
| Overall Length (mm) | 63.50mm |
| Thread Length (Decimal Inch) | 0.591" |
| Thread Length (mm) | 15.01mm |
| Square Length (Decimal Inch) | 0.310" |
| Square Length (mm) | 7.87mm |
| Shank Diameter (Decimal Inch) | 0.255" |
| Shank Diameter (mm) | 6.48mm |
| Square Size (Decimal Inch) | 0.191" |
| Square Size (mm) | 4.85mm |
| Neck Diameter (Decimal Inch) | 0.180" |
| Neck Diameter (mm) | 4.57mm |
| Drill Bit Size (Decimal Inch) | 0.205" |
| Drill Bit Size (mm) | 5.20mm |
| Connection Size (Decimal Inch) | 0.255" - 0.191" |
| Connection Size (mm) | 6.48 - 4.85mm |
| Length / Diameter | 3.0 x D |
| Usable Length (Decimal Inch) | 1.000" |
| Usable Length (mm) | 25.40mm |
| Shank Type | Square |
| Number of Flutes | 3 |
| Coating | TiN |
| Material | P-HSS |
| Blank Standard | 302A |
| Tap Type | SPPT |
| Series | M8 |
| Product Type | Spiral Point Tap |
714.897.1700
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