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7pc HSS Straight Shank Counterbore Set - M3-M12

7pc HSS Straight Shank Counterbore Set

A counterbore is used to cut a flat bottomed pocket to allow a socket head cap screw to be fitted flush or below the surface of the workpiece. The cutter's solid pilot keeps the counterbore concentric with the pilot hole without scoring or damaging the hole.

  • High Speed Steel
  • Straight Shank
  • Oversized solid pilot
  • Metal storage tin

Cutters included in the set:

Size Pilot Diameter Cutter Diameter Shank Diameter Overall Length
M3 3.4mm 6mm 5mm 71mm
M4 4.5mm 8mm
M5 5.5mm 10mm 8mm 80mm
M6 6.6mm 11mm
M8 9.0mm 15mm 12.5mm 100mm
M10 11.0mm 18mm
M12 13.5mm 20mm
060-079-25100 7pc HSS Straight Shank Counterbore Set - M3-M12 £50.80 Excl.VAT
£60.96 Inc.VAT
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