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    5 Products
    About Countersinks
    industrial info icon

    Choose the right countersink angle, body diameter, and number of flutes for your application.

    Drill-Bit Countersinks for Wood and Plastic

    These countersinks attach at various points along the drill bit, so one tool will drill countersunk holes for screws of different lengths. They're designed to cut a smooth and even finish in wood and plastic on the first pass.
    High-Speed Steel
    Image of Product. Front orientation. Countersinks. Straight Flute, Drill-Bit Countersink, For Cutting Screw Holes, For Wood, Sold Individually, 1 Countersinking End, 4 Flutes.

    4 Flutes

    The choice if you're countersinking lots of holes, these wear-resistant countersinks cut faster and last longer than carbon steel.
    Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.
    Countersinks
    Depth Stops
    Uncoated
    Body
    Dia.
    For Drill
    Bit Size
    For Screw
    Size
    Overall
    Lg.
    Mfr.
    Each
    OD
    Wd.
    Each
    4 Flutes
     
    82° Countersink Angle
    1/4"3/32"No. 3
    		3/4"W. L. Fuller2910A110000001/2"1/4"2903A1100000
     
    90° Countersink Angle
    1/4"3/32"No. 3
    		3/4"W. L. Fuller2910A71000001/2"1/4"2903A110000
     
    Carbon Steel
    Image of Product. Front orientation. Countersinks. Straight Flute, Drill-Bit Countersink, For Cutting Screw Holes, For Wood, Sold Individually, 1 Countersinking End, 4 Flutes.

    4 Flutes

    Stronger than high-speed steel, so it will cut through harder materials. However, high-speed steel is more precise, lasts longer, and cuts at higher speeds.
    Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.
    Countersinks
    Depth Stops
    Uncoated
    Body
    Dia.
    For Drill
    Bit Size
    For Screw
    Size
    Overall
    Lg.
    Mfr.
    Each
    OD
    Wd.
    Each
    4 Flutes
     
    82° Countersink Angle
    1/4"3/32"No. 3
    		3/4"W. L. Fuller2785A120000001/2"1/4"2903A1100000
     

    Counterbores for High-Profile Rounded-Head Screws

    Cut flat, close-fitting recesses for fillister-head screws. These counterbores cut deeply enough for screws with tall head profiles to sit flush with the surface.
    High-Speed SteelAbout High-Speed Steel
    Image of Product. Front orientation. Counterbores. Counterbores for High-Profile Rounded-Head Screws.
    Durable and wear resistant, these counterbores make accurate cuts in most materials without chipping or cracking.
    Uncoated
    For Screw
    Size
    Body
    Dia.
    Overall
    Lg.
    Shank
    Type
    No. of
    Flutes
    Pilot
    Lg.
    Mfr.
    Each
    No. 3
    		0.176"2 1/2"Round20.120"Republic Drill2909A14000000
     
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