countersinking

coun-ter-sink-ing

verb

Creating a conical recess in a surface for a screw head to sit flush.

"He was countersinking the holes for the new hinges."

noun

The process of forming a conical recess for a screw head to sit flush.

"Proper countersinking ensures a smooth, flush finish."

Thesaurus

Synonyms: countersink, counterbore, countersink bit, set