A counterbore hole is usually used when the head of a fastener, such as a hex head or socket head capscrew, is required to be flush with or below the level of a workpiece's surface.

Dec 30, 2024 · A counterbore creates a flat-bottomed, enlarged opening so that the head of a screw or bolt can sit flush with or below the surface, while a countersink creates a conical …

Mar 21, 2021 · A counterbore will create a hole that is flat on the bottom. This will allow the bolt or screw that has a flat underside as opposed to the angled shape of a countersink to rest inside.

Quick-Change Hex Drill-Bit Counterbores for Wood Pop into a hand-driven tool to drill and counterbore a hole in a single step 14 products

Aug 9, 2022 · A counterbore is a flat-bottomed cylindrical hole that is larger than and coaxial to another cylindrical hole. It is used to provide a flat and recessed mounting surface for mating …

Feb 16, 2021 · A counterbore is a circular hole with a flat bottom which coincides with another hole. The counterbored section allows a bolt head or other fastener to be recessed.

What Is a Counterbore? A counterbore is a hole-making tool that enlarges a portion of an existing hole to create a flat-bottomed recess for a screw, bolt, or nut head. This allows fasteners to sit …

Feb 27, 2025 · What is a Counterbore Hole? A counterbore is a cylindrical, flat-bottomed hole that enlarges another hole to allow the head of a screw or bolt to sit flush with or if needed, below …

The counterbore enlarges an existing hole and has a flat bottom, ensuring that the head of the fastener sits evenly and securely while maintaining a common centerline with the initial hole.

Dec 30, 2023 · This guide helps product developers and engineers choose the optimal counterbore solution for their specific requirements.