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Countersinks

Countersinks or center reamers are commonly used to drill holes that leave screw heads or rivets flush with the material. Many different styles and sizes are available to work in most materials and with many sizes of screw heads.

31 Items

Set Descending Direction

Top products

  1. #6/#8/#10 3Pc Countersink Set
    #6/#8/#10 3Pc Countersink Set
    Milwaukee #6/#8/#10 3Pc Countersink Set
    CF Product Code: MIA48135003
    CAD $32.99
    / Each
    In stock
    Milwaukee #6/#8/#10 3Pc Countersink Set
    CF Product Code: MIA48135003
    CAD $32.99
    / Each
    In stock
  2. 5/8" Steel 3 Flute Countersink
    5/8" Steel 3 Flute Countersink
    Drillco 5/8" Steel 3 Flute Countersink
    CF Product Code: DCT37E140B
    CAD $27.99
    / Each
    In stock
    Drillco 5/8" Steel 3 Flute Countersink
    CF Product Code: DCT37E140B
    CAD $27.99
    / Each
    In stock
  3. #6 Countersink with 9/64" Bit
    #6 Countersink with 9/64" Bit
    Milwaukee #6 Countersink with 9/64" Bit
    CF Product Code: MIA48135000
    CAD $11.99
    / Each
    In stock
    Milwaukee #6 Countersink with 9/64" Bit
    CF Product Code: MIA48135000
    CAD $11.99
    / Each
    In stock
  4. #6 7/64" Countersink Bit
    #6 7/64" Countersink Bit
    #6 7/64" Countersink Bit
    CF Product Code: DIMTDB764
    CAD $9.99
    / Each
    In stock
    #6 7/64" Countersink Bit
    CF Product Code: DIMTDB764
    CAD $9.99
    / Each
    In stock
  5. #8 1/8" Countersink Bit
    #8 1/8" Countersink Bit
    #8 1/8" Countersink Bit
    CF Product Code: DIMTDB18
    CAD $9.99
    / Each
    In stock
    #8 1/8" Countersink Bit
    CF Product Code: DIMTDB18
    CAD $9.99
    / Each
    In stock
  6. 1/2" Steel 3 Flute Countersink
    1/2" Steel 3 Flute Countersink
    Drillco 1/2" Steel 3 Flute Countersink
    CF Product Code: DCT37E132B
    CAD $18.99
    / Each
    In stock
    Drillco 1/2" Steel 3 Flute Countersink
    CF Product Code: DCT37E132B
    CAD $18.99
    / Each
    In stock
  7. 3/8" Steel 3 Flute Countersink
    3/8" Steel 3 Flute Countersink
    Drillco 3/8" Steel 3 Flute Countersink
    CF Product Code: DCT37E124B
    CAD $15.99
    / Each
    In stock
    Drillco 3/8" Steel 3 Flute Countersink
    CF Product Code: DCT37E124B
    CAD $15.99
    / Each
    In stock
  8. 1/4" Steel 3 Flute Countersink
    1/4" Steel 3 Flute Countersink
    Drillco 1/4" Steel 3 Flute Countersink
    CF Product Code: DCT37E116B
    CAD $13.99
    / Each
    In stock
    Drillco 1/4" Steel 3 Flute Countersink
    CF Product Code: DCT37E116B
    CAD $13.99
    / Each
    In stock
  9. #8 Countersink with 11/64" Bit
    #8 Countersink with 11/64" Bit
    Milwaukee #8 Countersink with 11/64" Bit
    CF Product Code: MIA48135001
    CAD $13.99
    / Each
    In stock
    Milwaukee #8 Countersink with 11/64" Bit
    CF Product Code: MIA48135001
    CAD $13.99
    / Each
    In stock
  10. #10 9/64" Countersink
    #10 9/64" Countersink
    #10 9/64" Countersink
    CF Product Code: DIMTDC43009
    CAD $33.99
    / Each
    In stock
    #10 9/64" Countersink
    CF Product Code: DIMTDC43009
    CAD $33.99
    / Each
    In stock
  11. #10 9/64" Countersink Bit
    #10 9/64" Countersink Bit
    #10 9/64" Countersink Bit
    CF Product Code: DIMTDB964
    CAD $10.99
    / Each
    In stock
    #10 9/64" Countersink Bit
    CF Product Code: DIMTDB964
    CAD $10.99
    / Each
    In stock
  12. 7/64" Self Centering Countersink Bit
    7/64" Self Centering Countersink Bit
    7/64" Self Centering Countersink Bit
    CF Product Code: DIM45107
    CAD $57.99
    / Each
    In stock
    7/64" Self Centering Countersink Bit
    CF Product Code: DIM45107
    CAD $57.99
    / Each
    In stock
  13. #8 Aluminum Countersink
    #8 Aluminum Countersink
    #8 Aluminum Countersink
    CF Product Code: WLDCS8S
    CAD $28.99
    / Each
    In stock
    #8 Aluminum Countersink
    CF Product Code: WLDCS8S
    CAD $28.99
    / Each
    In stock
  14. 3/4" Steel 3 Flute Countersink
    3/4" Steel 3 Flute Countersink
    Drillco 3/4" Steel 3 Flute Countersink
    CF Product Code: DCT37E148B
    CAD $41.99
    / Each
    In stock
    Drillco 3/4" Steel 3 Flute Countersink
    CF Product Code: DCT37E148B
    CAD $41.99
    / Each
    In stock
  15. #6 Aluminum Countersink
    #6 Aluminum Countersink
    #6 Aluminum Countersink
    CF Product Code: WLDCS6S
    CAD $28.99
    / Each
    In stock
    #6 Aluminum Countersink
    CF Product Code: WLDCS6S
    CAD $28.99
    / Each
    In stock
  16. #18 Aluminum Countersink
    #18 Aluminum Countersink
    #18 Aluminum Countersink
    CF Product Code: WLDCS18S
    CAD $45.99
    / Each
    In stock
    #18 Aluminum Countersink
    CF Product Code: WLDCS18S
    CAD $45.99
    / Each
    In stock
  17. #10 Aluminum Countersink
    #10 Aluminum Countersink
    #10 Aluminum Countersink
    CF Product Code: WLDCS10S
    CAD $34.99
    / Each
    In stock
    #10 Aluminum Countersink
    CF Product Code: WLDCS10S
    CAD $34.99
    / Each
    In stock
  18. #10 Countersink with 3/16" Bit
    #10 Countersink with 3/16" Bit
    Milwaukee #10 Countersink with 3/16" Bit
    CF Product Code: MIA48135002
    CAD $13.99
    / Each
    In stock
    Milwaukee #10 Countersink with 3/16" Bit
    CF Product Code: MIA48135002
    CAD $13.99
    / Each
    In stock
  19. #8 Carbide Tipped Countersink Round Shank
    #8 Carbide Tipped Countersink Round Shank
    Dimar #8 Carbide Tipped Countersink, Round Shank
    CF Product Code: GLT202CT3
    CAD $49.99
    / Each
    In stock
    Dimar #8 Carbide Tipped Countersink, Round Shank
    CF Product Code: GLT202CT3
    CAD $49.99
    / Each
    In stock
  20. #5 3/32" Countersink
    #5 3/32" Countersink
    #5 3/32" Countersink
    CF Product Code: DIMTDC43006
    CAD $31.99
    / Each
    In stock
    #5 3/32" Countersink
    CF Product Code: DIMTDC43006
    CAD $31.99
    / Each
    In stock
  21. 3/4, Countersink 82Deg Single Flute
    3/4, Countersink 82Deg Single Flute
    Drillco 3/4, Countersink 82Deg Single Flute
    CF Product Code: DCT36E148B
    CAD $34.99
    / Each
    In stock
    Drillco 3/4, Countersink 82Deg Single Flute
    CF Product Code: DCT36E148B
    CAD $34.99
    / Each
    In stock
  22. #8 1/8" Countersink
    #8 1/8" Countersink
    #8 1/8" Countersink
    CF Product Code: DIMTDC43008
    CAD $33.99
    / Each
    Out of stock
    #8 1/8" Countersink
    CF Product Code: DIMTDC43008
    CAD $33.99
    / Each
    Out of stock
  23. #6 7/64" Countersink
    #6 7/64" Countersink
    #6 7/64" Countersink
    CF Product Code: DIMTDC43007
    CAD $32.99
    / Each
    Out of stock
    #6 7/64" Countersink
    CF Product Code: DIMTDC43007
    CAD $32.99
    / Each
    Out of stock
  24. 2" Chatterless Countersink 90Deg 6 Flute
    2" Chatterless Countersink 90Deg 6 Flute
    CFT-Approved 9/16" HSS Zero Flute Countersink
    CF Product Code: CCTCSK18SH
    CAD $48.99
    / Each
    Special Order
    Not Stocked. We will contact you with an ETA after an order is placed.
    CFT-Approved 9/16" HSS Zero Flute Countersink
    CF Product Code: CCTCSK18SH
    CAD $48.99
    / Each
    Special Order
    Not Stocked. We will contact you with an ETA after an order is placed.
  25. #8 11/64" Wood Countersink Bit
    #8 11/64" Wood Countersink Bit
    Irwin #8 11/64" Wood Countersink Bit
    CF Product Code: IRW1882788
    CAD $12.99
    / Each
    Special Order
    Not Stocked. We will contact you with an ETA after an order is placed.
    Irwin #8 11/64" Wood Countersink Bit
    CF Product Code: IRW1882788
    CAD $12.99
    / Each
    Special Order
    Not Stocked. We will contact you with an ETA after an order is placed.
  26. #6 9/64" Wood Countersink Bit
    #6 9/64" Wood Countersink Bit
    Irwin #6 9/64" Wood Countersink Bit
    CF Product Code: IRW1882787
    CAD $12.99
    / Each
    Special Order
    Not Stocked. We will contact you with an ETA after an order is placed.
    Irwin #6 9/64" Wood Countersink Bit
    CF Product Code: IRW1882787
    CAD $12.99
    / Each
    Special Order
    Not Stocked. We will contact you with an ETA after an order is placed.
  27. #4 7/64" Wood Countersink Bit
    #4 7/64" Wood Countersink Bit
    Irwin #4 7/64" Wood Countersink Bit
    CF Product Code: IRW1882786
    CAD $12.99
    / Each
    Special Order
    Not Stocked. We will contact you with an ETA after an order is placed.
    Irwin #4 7/64" Wood Countersink Bit
    CF Product Code: IRW1882786
    CAD $12.99
    / Each
    Special Order
    Not Stocked. We will contact you with an ETA after an order is placed.
  28. #4 7/64" Wood Countersink
    #4 7/64" Wood Countersink
    Irwin #4 7/64" Wood Countersink
    CF Product Code: IRW1882630
    CAD $17.99
    / Each
    Special Order
    Not Stocked. We will contact you with an ETA after an order is placed.
    Irwin #4 7/64" Wood Countersink
    CF Product Code: IRW1882630
    CAD $17.99
    / Each
    Special Order
    Not Stocked. We will contact you with an ETA after an order is placed.
  29. #6 Carbide Tipped Countersink Round Shank
    #6 Carbide Tipped Countersink Round Shank
    Dimar #6 Carbide Tipped Countersink, Round Shank
    CF Product Code: GLT202CT6B
    CAD $48.99
    / Each
    Special Order
    Not Stocked. We will contact you with an ETA after an order is placed.
    Dimar #6 Carbide Tipped Countersink, Round Shank
    CF Product Code: GLT202CT6B
    CAD $48.99
    / Each
    Special Order
    Not Stocked. We will contact you with an ETA after an order is placed.
  30. #6 9/64" Countersink Bit Only
    #6 9/64" Countersink Bit Only
    Dewalt #6 9/64" Countersink Bit Only
    CF Product Code: DWADW2537
    CAD $18.99
    / Each
    Special Order
    Not Stocked. We will contact you with an ETA after an order is placed.
    Dewalt #6 9/64" Countersink Bit Only
    CF Product Code: DWADW2537
    CAD $18.99
    / Each
    Special Order
    Not Stocked. We will contact you with an ETA after an order is placed.
  31. #5 3/32" Countersink Bit
    #5 3/32" Countersink Bit
    #5 3/32" Countersink Bit
    CF Product Code: DIMTDB332
    CAD $7.99
    / Each
    Special Order
    Not Stocked. We will contact you with an ETA after an order is placed.
    #5 3/32" Countersink Bit
    CF Product Code: DIMTDB332
    CAD $7.99
    / Each
    Special Order
    Not Stocked. We will contact you with an ETA after an order is placed.

31 Items

Set Descending Direction

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:

 

 

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.