Sekirov Dictionary

countersink

noun2

  1. A conical recess, typically machined at the mouth of a hole to admit a screw (with a matching taper) so that the screw sits flush with a surface.
  2. The cutter used to cut such a recess. (Also used, at less depth, for edge-breaking/deburring.)

verb2

  1. To create such a conical recess.
  2. To cause to sink even with or below the surface.
forms

countersunk · countersank · countersinking · countersinks

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