counterbore
Meanings
noun
- A cylindrical recess, typically machined at the mouth of a hole to admit a screw (such as a cap screw) so that the screw sits flush with a surface.
- The cutter used to cut such a recess. (Also used, at less depth, for spotfacing.)
verb
- To create such a cylindrical recess.
Word forms
Etymology
From counter- (“against”) + bore (“hole”).
Related words
Derived words
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