countersink
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Comparison of countersunk and counterbored holes.
English
Etymology
Noun
countersink (plural countersinks)
- 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.
- Coordinate term: counterbore (cylindrical)
- The cutter used to cut such a recess. (Also used, at less depth, for edge-breaking/deburring.)
- Synonym: countersinker
- Hypernyms: cutter, cutting tool
- Holonym: center drill (combined drill and countersink)
- Coordinate terms: counterbore (cylindrical); drill, drill bit; reamer; endmill
Translations
a conical recess machined around a hole
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Verb
countersink (third-person singular simple present countersinks, present participle countersinking, simple past countersank or countersunk, past participle countersunk)
- (transitive) To create such a conical recess.
- to countersink a hole for a screw
- (transitive, intransitive) To cause to sink even with or below the surface.
- to countersink a screw or bolt into woodwork
- 2010, Larry Pardey, Details of Classic Boat Construction, pages 7-30:
- I countersank into the locust just enough to make the nailhead flush.
Derived terms
Related terms
- diesinking
- sink (verb)
Translations
to create a conical recess