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  1. Countersink - Wikipedia

    Comparison of countersunk and counterbored holes. In manufacturing, a countersink (symbol: ⌵) is a conical hole cut into a manufactured object, or the cutter used to cut such a hole. A …

  2. What Is a Countersunk Hole, and How Is It Used?

    Apr 21, 2025 · Precision machining is crucial when creating countersunk holes, particularly in high-performance industries such as aerospace. One of the challenges is maintaining …

  3. Countersunk Screws | McMaster-Carr

    Choose from our selection of countersunk screws, including over 9,500 products in a wide range of styles and sizes. Same and Next Day Delivery.

  4. What Is Countersunk Screw & How To Countersink?

    The countersunk screw also known as a flat-head screw is a type of screw that’s designed to rest flush with the object or surface in which it’s inserted. Countersunk screws are simply …

  5. Countersink | GD&T Basics

    Sep 7, 2022 · The purpose of a countersink is to allow a fastener, typically a flathead screw, to sit slightly below the surface of the part. A countersink consists of a conical hole that is coaxial to …

  6. COUNTERSUNK Definition & Meaning - Merriam-Webster

    The meaning of COUNTERSINK is to make a countersink on (a hole).

  7. Countersunk vs. Countersink — What’s the Difference?

    Mar 18, 2024 · In woodworking or metalworking, 'countersunk' is often used to describe the finished appearance of a project where fasteners are not protruding, whereas 'countersink' is …

  8. What Is a Countersunk Hole and When Is It Used? - Engineer Fix

    Nov 4, 2025 · The primary reason for utilizing a countersunk hole is to achieve a flush surface finish after the fastener is installed. When the head of a flat-head screw or a countersunk rivet …

  9. What are Countersink Holes in Engineering? | Xometry

    Dec 16, 2022 · Countersunk holes are a type of engineering hole most commonly used for the aesthetic flush fitting of fasteners to render a product surface smoother. This article will …

  10. Countersinks - All About - Machinist Guides

    Feb 16, 2021 · What is a countersink? A countersink is an angled taper applied to a hole that allows a fastener (usually a flat head screw or similar) to sit even with, or below the surface …