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    18 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. Drill-Bit Countersink, 1 Countersinking End, For Wood, For Cutting Screw Holes, Sold Individually, Straight Flute, 4 Flutes.

    4 Flutes

    These wear-resistant countersinks cut faster and last longer than carbon steel countersinks, so they’re often used for high-volume jobs. You can also use them on harder materials, such as steel and stainless steel.
    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
    5/8"3/16"No. 9
    		1 1/16"W. L. Fuller2910A230000007/8"1/4"2903A1700000
    5/8"1/4"No. 16
    		1 1/16"W. L. Fuller2910A24000007/8"1/4"2903A170000
    5/8"9/32"No. 16
    		1 1/16"W. L. Fuller2910A25000007/8"1/4"2903A170000
    5/8"5/16"No. 18
    		1 1/16"W. L. Fuller2910A26000007/8"1/4"2903A170000
     
    90° Countersink Angle
    5/8"3/16"No. 9
    		1 1/16"W. L. Fuller2910A83000007/8"1/4"2903A170000
    5/8"1/4"No. 16
    		1 1/16"W. L. Fuller2910A84000007/8"1/4"2903A170000
    5/8"9/32"No. 16
    		1 1/16"W. L. Fuller2910A85000007/8"1/4"2903A170000
    5/8"5/16"No. 18
    		1 1/16"W. L. Fuller2910A86000007/8"1/4"2903A170000
     
    Carbon Steel
    Image of Product. Front orientation. Countersinks. Drill-Bit Countersink, 1 Countersinking End, For Wood, For Cutting Screw Holes, Sold Individually, Straight Flute, 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.
    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
    5/8"3/16"No. 9
    		1 1/16"W. L. Fuller2785A530000007/8"1/4"2903A1700000
    5/8"1/4"No. 16
    		1 1/16"W. L. Fuller2785A54000007/8"1/4"2903A170000
    5/8"9/32"No. 16
    		1 1/16"W. L. Fuller2785A56000007/8"1/4"2903A170000
    5/8"5/16"No. 18
    		1 1/16"W. L. Fuller2785A58000007/8"1/4"2903A170000
     

    Square Drive Size Adapters

    Image of Product. Front orientation. Socket Adapters. Square Drive Size Adapters.
    Convert from one square drive size to another. The female side of the adapter attaches to your wrench; the male side to your socket. These adapters have a finish that provides some corrosion resistance.
    Chrome-Plated Steel—Chrome-plated steel adapters have a mirror-like finish and are easy to clean.
    Square Drive Size (Gender)
    Overall
    Lg.
    Each
    Chrome-Plated Steel
    3/8" (Female) × 1/4" (Male)1 1/16"5522A41000000
     

    Square Drive Adapters for Box Wrenches

    Image of ProductInUse. Shown Installed in a Box Wrench. Front orientation. Socket Adapters. Square Drive Adapters for Box Wrenches.

    Shown Installed in a Box Wrench

    Image of Product. Front orientation. Socket Adapters. Square Drive Adapters for Box Wrenches.
    Attach one of these adapters to a ratcheting box wrench to convert it to a ratcheting socket wrench. They’re designed to tolerate continuous use in high-volume production and assembly. They’re hardened to resist wear from repeated use, so they’ll last longer than standard impact adapters.
    Hex Drive
    Size
    Overall
    Lg.
    Material
    Socket Retainer
    Style
    Each
     
    3/8" Square Drive
    1/2"1 1/16"Steel
    		Pin93858A120000000
     
    1/2" Square Drive
    1/2"1 1/16"Steel
    		Pin93858A13000000
     

    Electrical Insulating Square Drive Size Adapters

    Image of Product. Front orientation. Socket Adapters. Electrical Insulating Square Drive Size Adapters.
    Insulated to protect against accidental contact with live electrical circuits, these adapters are tested to 1,000 volts to meet IEC 60900.
    Square Drive Size (Gender)
    Overall
    Lg.
    Material
    Specs.
    Met
    Each
    3/8" (Female) × 1/4" (Male)1 1/16"Plastic-Coated SteelIEC 6090055445A55000000
     

    Impact Square Drive Size Adapters

    Image of Product. Front orientation. Socket Adapters. Impact Square Drive Size Adapters, Ball Detent Socket Retainer.

    Ball Detent Socket

    Retainer

    Convert from one square drive size to another. The female side of the adapter attaches to your wrench; the male side to your socket. These adapters are made to withstand the high torque and force of impact tools.
    Square Drive Size (Gender)
    Overall
    Lg.
    Material
    Color
    Socket Retainer
    Style
    Each
    3/8" (Female) × 1/4" (Male)1 1/16"Magnesium Phosphate-Coated SteelBlackBall Detent53055A102000000
     
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