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Metric
To suit bolt ISO Metric/Din Standards
Spiral flute, 3 flute. Medium duty. Used for milling of pre-drilled holes to allow bolt or cap head screws to lie flush with the component surface. Manufactured to BS328: 5:1983.
| Material | HSS |
| Shank Type | Threaded |
| Taper Shank Size | M4 |
| Bolt Size | M4 |
| Product Type | Counterbore |
| Pilot Diameter | 4.3mm |
| Standards Met | BS 328 |
| Cutting Diameter | 8mm |
| Number of Flutes | 3 |
| Overall Length | 65mm |
| Finish/Coating | Uncoated |
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