blind hole
Technical term in engineering and manufacturing for a hole that does not go all the way through a workpiece. The kanji 盲 (blind) can be considered sensitive; in some contexts the kana spelling or alternative terms like 止まり穴 are preferred.
Several blind holes are drilled in this part.
I measured the depth of the blind hole with calipers.
A compound of 盲, “blind,” and 穴, “hole,” describing a hole that does not pass completely through a workpiece.