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Counterbore
Meaning
Noun
●
A
cylindrical
recess
,
typically
machined
around a
hole
to
admit
a
screw
so that it
sits
flush
with a surface.
●
In Tools:
The
tool
with which a
counterbore
is machined.
Verb
●
To create such a
cylindrical
recess.
Sourced from
Wiktionary
Origin
counterbore
English
bore
English
borian
Old English (ca. 450-1100)
counter-
English
Sourced from
Etym
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