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    67 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, Straight Flute, Sold Individually, For Cutting Screw Holes, For Wood, 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.
    Countersinks
    Counterbore Collars
    Uncoated
    Body
    Dia.
    For Drill
    Bit Size
    For Screw
    Size
    Overall
    Lg.
    Each
    OD
    Wd.
    Each
    4 Flutes
     
    82° Countersink Angle
    1/4"3/32"No. 3
    3/4"2910A110000001/2"1/4"2903A1100000
    5/16"7/64"No. 4
    3/4"2910A12000009/16"1/4"2903A120000
    3/8"1/8"No. 5
    7/8"2910A13000005/8"1/4"2903A130000
    3/8"9/64"No. 6
    7/8"2910A14000005/8"1/4"2903A130000
    3/8"5/32"No. 7
    7/8"2910A15000005/8"1/4"2903A130000
    3/8"11/64"No. 8
    7/8"2910A16000005/8"1/4"2903A130000
    3/8"3/16"No. 9
    7/8"2910A17000005/8"1/4"2903A130000
    3/8"13/64"No. 10
    7/8"2910A29000005/8"1/4"2903A130000
    3/8"7/32"No. 12
    7/8"2910A31000005/8"1/4"2903A130000
    7/16"13/64"No. 10
    7/8"2910A180000011/16"1/4"2903A140000
    1/2"5/32"No. 7
    7/8"2910A32000003/4"1/4"2903A150000
    1/2"3/16"No. 9
    7/8"2910A27000003/4"1/4"2903A150000
    1/2"13/64"No. 10
    7/8"2910A19000003/4"1/4"2903A150000
    1/2"7/32"No. 12
    7/8"2910A21000003/4"1/4"2903A150000
    1/2"1/4"No. 14
    7/8"2910A22000003/4"1/4"2903A150000
    5/8"3/16"No. 9
    1 1/16"2910A23000007/8"1/4"2903A170000
    5/8"1/4"No. 16
    1 1/16"2910A24000007/8"1/4"2903A170000
    5/8"9/32"No. 16
    1 1/16"2910A25000007/8"1/4"2903A170000
    5/8"5/16"No. 18
    1 1/16"2910A26000007/8"1/4"2903A170000
     
    90° Countersink Angle
    1/4"3/32"No. 3
    3/4"2910A71000001/2"1/4"2903A110000
    5/16"7/64"No. 4
    3/4"2910A72000009/16"1/4"2903A120000
    3/8"1/8"No. 5
    7/8"2910A73000005/8"1/4"2903A130000
    3/8"9/64"No. 6
    7/8"2910A74000005/8"1/4"2903A130000
    3/8"5/32"No. 7
    7/8"2910A75000005/8"1/4"2903A130000
    3/8"11/64"No. 8
    7/8"2910A76000005/8"1/4"2903A130000
    3/8"3/16"No. 9
    7/8"2910A77000005/8"1/4"2903A130000
    3/8"13/64"No. 10
    7/8"2910A89000005/8"1/4"2903A130000
    3/8"7/32"No. 12
    7/8"2910A91000005/8"1/4"2903A130000
    7/16"13/64"No. 10
    7/8"2910A780000011/16"1/4"2903A140000
    1/2"5/32"No. 7
    7/8"2910A92000003/4"1/4"2903A150000
    1/2"3/16"No. 9
    7/8"2910A87000003/4"1/4"2903A150000
    1/2"13/64"No. 10
    7/8"2910A79000003/4"1/4"2903A150000
    1/2"7/32"No. 12
    7/8"2910A81000003/4"1/4"2903A150000
    1/2"1/4"No. 14
    7/8"2910A82000003/4"1/4"2903A150000
    5/8"3/16"No. 9
    1 1/16"2910A83000007/8"1/4"2903A170000
    5/8"1/4"No. 16
    1 1/16"2910A84000007/8"1/4"2903A170000
    5/8"9/32"No. 16
    1 1/16"2910A85000007/8"1/4"2903A170000
    5/8"5/16"No. 18
    1 1/16"2910A86000007/8"1/4"2903A170000
     
    Carbon Steel
    Image of Product. Front orientation. Countersinks. Drill-Bit Countersink, Straight Flute, Sold Individually, For Cutting Screw Holes, For Wood, 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.
    Countersinks
    Counterbore Collars
    Uncoated
    Body
    Dia.
    For Drill
    Bit Size
    For Screw
    Size
    Overall
    Lg.
    Each
    OD
    Wd.
    Each
    4 Flutes
     
    82° Countersink Angle
    1/4"3/32"No. 3
    3/4"2785A120000001/2"1/4"2903A1100000
    5/16"7/64"No. 4
    7/8"2785A13000009/16"1/4"2903A120000
    3/8"1/8"No. 5
    7/8"2785A2100005/8"1/4"2903A130000
    3/8"9/64"No. 6
    7/8"2785A2200005/8"1/4"2903A130000
    3/8"5/32"No. 7
    7/8"2785A2300005/8"1/4"2903A130000
    3/8"11/64"No. 8
    7/8"2785A2400005/8"1/4"2903A130000
    3/8"3/16"No. 9
    7/8"2785A2500005/8"1/4"2903A130000
    3/8"13/64"No. 10
    7/8"2785A2600005/8"1/4"2903A130000
    3/8"7/32"No. 12
    7/8"2785A2700005/8"1/4"2903A130000
    7/16"13/64"No. 10
    7/8"2785A310000011/16"1/4"2903A140000
    1/2"5/32"No. 7
    7/8"2785A35000003/4"1/4"2903A150000
    1/2"3/16"No. 9
    7/8"2785A37000003/4"1/4"2903A150000
    1/2"13/64"No. 10
    7/8"2785A38000003/4"1/4"2903A150000
    1/2"7/32"No. 12
    7/8"2785A39000003/4"1/4"2903A150000
    1/2"1/4"No. 14
    7/8"2785A52000003/4"1/4"2903A150000
    5/8"3/16"No. 9
    1 1/16"2785A53000007/8"1/4"2903A170000
    5/8"1/4"No. 16
    1 1/16"2785A54000007/8"1/4"2903A170000
    5/8"9/32"No. 16
    1 1/16"2785A56000007/8"1/4"2903A170000
    5/8"5/16"No. 18
    1 1/16"2785A58000007/8"1/4"2903A170000
     

    Drill-Bit Countersink Sets for Wood and Plastic

    Image of Product. Front orientation. Countersinks. Sold as Sets, For Cutting Screw Holes, Straight Flute, Drill-Bit Countersink, For Wood, 1 Countersinking End.
    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—The choice if you're countersinking lots of holes, these wear-resistant countersinks cut faster and last longer than carbon steel.
    Carbon Steel—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.
    82°
    Countersink Angle
    No. of
    Flutes
    Body Dia. Included
    No. of
    Pieces
    For Drill Bit Size
    Finish
    Container
    Type
    Each
    High-Speed Steel
    43/8", 7/16", 1/2"71/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32"UncoatedWood Stand2910A410000000
    43/8", 7/16", 1/2", 5/8"141/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 1/4", 9/32", 5/16"UncoatedWood Stand2910A45000000
     
    Carbon Steel
    43/8", 7/16", 1/2"71/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32"UncoatedWood Stand2785A4600000
    43/8", 7/16", 1/2", 5/8"141/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 1/4", 9/32", 5/16"UncoatedWood Stand2785A48000000
     
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