Countersinks

Countersink Types and Applications

Construction Fasteners and Tools offers various countersink products to match the project and the types of screws you're using. Typical applications allow a countersunk screw's head to sit below or flush with a hole's surface after insertion. Countersinks can also remove burrs left from tapping or drilling operations.
 

Common types of countersinks include:

• Zero-flute countersinks: Zero-flute countersinks work best as deburring tools and for boring softer materials like wood, plastic and light aluminum to create a countersunk hole for a screw.
• Single-flute countersinks: Single-flute countersinks are optimal when multi-flute countersinks chatter excessively or when the hole is too small for a multi-flute bit to enter. These are ideal for machine work and operating at high speeds in manufacturing environments.
• Multiple-flute countersinks: These countersinks work well with flathead screws and rivets in portable drilling applications.

Some countersinks are available as a combination bit that drills the entry hole and creates the countersink in one step.

A simple rule of thumb when choosing the size of countersink you need is to select a bit that is slightly larger than the bolt or screw's diameter.

Brands of Countersinks We Offer

Our extensive selection of countersinks features products from some of the leading brands in the industry, including:

• Drillco: Our line of Drillco products feature various sizes of multiple-flute center reamers perfect for rivets and flathead screws.
• Irwin®: We offer several countersink bits from Irwin containing widened flutes for fast and clean wood drilling.
• Milwaukee®: Our Milwaukee offerings include high-speed combination pre-drilling and countersinks bits in addition to a three-piece set containing a range of sizes.
• DIMAR: We feature several carbide-tipped, high-speed steel (HSS) countersinks from DIMAR to accommodate various size screws in wood applications.
• DEWALT®: DEWALT's #6 9/64-inch bit is a combination drill and countersink bit ideal for fine wood drilling.
• CFT-Approved: We offer a CFT-Approved zero-flute HSS countersink perfect for softer woods.

Advantages of Using Countersinks

The woodworking industry displays many advantages of using countersinks, mainly when appearance and craftsmanship are critical elements of the product. Some of the benefits of using countersinks include:

• Easier screw insertion: Countersinks create a more accessible entry point for screws, making them easier to turn.
• More attractive appearance: These pieces allow you to drive the screw deeper into the material, creating a recessed area where you can cover the screw head with a plug.
• Damage control: Countersinks help prevent cracking in the wood during screw insertion.
• Accurate positioning: They ensure proper positioning and straightness of the screw.

Shop Countersinks at Construction Fasteners and Tools Today

Construction Fasteners and Tools has the right countersink bit for you, whether you're working on a do-it-yourself craft project or operating a manufacturing assembly line. Shop our extensive inventory of products today to find the exact tool you need. Feel free to reach out to our courteous staff online with any product-related questions.