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Glite Dictionary
countersink bit

countersink bit

8.6
A drill bit that makes the top of a hole wider so a screw head sits flat with the surface
  • noun
  • /ˈkaʊntərˌsɪŋk bɪt/
  • Specialized
translation icon : broca avellanadora
  • The carpenter chose a countersink bit to create a smooth finish for the screws on the wooden shelf.

Examples

  • I marked the place for a few screws and use the countersink bit to create room for the screw heads to fall into place and become flush to the plywood surface.

  • To ensure the screw heads sit flush with the surface, I used a countersink bit to enlarge the holes.

  • When installing the hardware, it's essential to use a countersink bit for a clean and professional look.

Synonyms

bit
vscountersink bit
40 6.5

The cutting part of a drill that makes holes

is the more specific form designed to widen a hole top for a head
drill bit
vscountersink bit
  • Specialized
11 3.7

A metal tool that makes holes in hard materials like rock or wood when attached to a drill

is the specialized version that widens the hole top for a fastener head
countersink
vscountersink bit
  • Specialized
8.4

A drill bit with a cone tip that makes the top of a hole bigger for a screw head

is the same item but named for the specific drill tool form

Surface Forms

countersink bit singular
countersink bits plural

Morphology

countersink + bit

This is a straightforward noun–noun compound where the first noun ('countersink') specifies the function of the second noun ('bit'): a bit used for countersinking holes. The meaning is directly compositional and follows common product-naming patterns, so a B1 learner who knows both constituents will be able to infer the MWE's meaning.

Etymology

The noun countersink bit is a drill bit that makes a small cone at the top of a hole so a screw head can 'sit flat' with or below the surface. The name comes from the idea of letting the screw sink into the material, so the head does not stick up.