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 recess for the screw …

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 parts.

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 …

Dec 16, 2022 · A counterbore involves adding a stepped hole, that recesses the head of the fastener (and washers where fitted). This cavity is cylindrical and generally flat/perpendicular at its lower face, …

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 flush or …

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.

Counterboring is the secondary machining process of creating a cylindrical shape at the top of a hole using a counterbore. Counterbored holes are often used to recess socket head cap screws below the …

Dec 17, 2024 · What is a Counterbore? A counterbore is a type of hole machining that involves creating a flat-bottomed hole with a larger, shallow recess at the top of an existing hole.