counterbore

English

A counterbore in a piece of metal.

Etymology

From counter- (“against”) +‎ bore (“hole”).

Noun

counterbore (plural counterbores)

1. A cylindrical recess, typically machined around a hole to admit a screw so that it sits flush with a surface.
2. The tool with which a counterbore is machined.

Translations

recess-machining tool

• Italian: accecatura f, svasatura f, accecatoio m
• (deprecated template usage) {{trans-mid}}
• Russian: зенко́вка (ru) f (zenkóvka), цеко́вка (ru) f (cekóvka), зе́нкер (ru) m (zénker)

Verb

1. (transitive) To create such a cylindrical recess.

See also

• countersink
• spotface