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These are manufactured to DIN standards to suit most metric cap screws. We also offer an imperial range manufactured to suit British and US standard cap screws. 

  • To machine a recess in a pre drilled hole to allow a cap screw to sit flush with the work piece surface.
  • The fixed pilot helps to create a rigid and concentric recess.

  • Stock item for next day delivery. Standard sizes can usually be modified to suit special size requirements.

Robert Charles Counterbore 5760-3
Robert Charles Counterbore 5757-3
BSA Counterbores