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    46 Products
    About Countersinks
    industrial info icon

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

    Drill-Point Countersinks for Screws

    Save time by drilling a pilot hole and countersinking in a single step. These countersinks have a small drill point to drill new pilot holes topped with cone-shaped recesses for screw heads.
    High-Speed Steel
    Image of Product. Front orientation. Countersinks. Drill-Point Countersinks for Screws, 2 Flutes.

    2 Flutes

    These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.
    Number of Flutes—Countersinks with fewer flutes reduce chatter, so you can run them at high speeds. Countersinks with a higher number of flutes remove more material per revolution, leaving a smoother finish and extending tool life.
    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.
    Dia.
    Uncoated
    Body
    Shank
    Drill Tip
    Dia.
    For Screw
    Size
    Overall
    Lg.
    Shank
    Type
    Mfr.
    Each
    2 Flutes
     
    82° Countersink Angle
    5/16"1/4"0.127"No. 5
    		1 3/4"RoundLink Industries28145A41000000
    5/16"1/4"0.140"No. 6
    		1 3/4"RoundLink Industries28145A4200000
    7/16"1/4"0.166"No. 8
    		2"RoundLink Industries28145A4300000
    7/16"1/4"0.192"No. 10
    		2"RoundLink Industries28145A4400000
    7/16"1/4"0.220"No. 12
    		2"RoundLink Industries28145A4500000
    1/2"3/8"0.252"1/4"
    		2 3/8"RoundLink Industries28145A4600000
    5/8"3/8"0.315"5/16"
    		2 5/8"RoundLink Industries28145A4700000
    3/4"1/2"0.378"3/8"
    		3"RoundLink Industries28145A4800000
     
    90° Countersink Angle
    6.35 mm6.35 mm3.10 mmM3
    		44.44 mmRoundLink Industries28145A7100000
    8.20 mm6.35 mm4.10 mmM4
    		44.44 mmRoundLink Industries28145A7200000
    11.10 mm7.93 mm5.10 mmM5
    		50.79 mmRoundLink Industries28145A7300000
    12.70 mm7.93 mm6.10 mmM6
    		50.79 mmRoundLink Industries28145A7400000
    17.45 mm11.11 mm8.10 mmM8
    		66.66 mmRoundLink Industries28145A7500000
    20.63 mm12.7 mm10.10 mmM10
    		76.19 mmRoundLink Industries28145A7600000
    25.40 mm15.87 mm12.10 mmM12
    		76.19 mmRoundLink Industries28145A7700000
     

    Drill-Point Countersink Sets for Screws

    Image of Product. Front orientation. Countersinks. Drill-Point Countersink Sets for Screws.
    Save time by drilling and countersinking your pilot hole in one pass for a range of screw sizes. These countersinks have a small drill point to drill new pilot holes topped with cone-shaped recesses for screw heads.
    High-Speed Steel—These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and 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.
    82°
    Countersink Angle
    No. of
    Flutes
    No. of
    Pieces
    For Screw Size
    Finish
    Shank
    Type
    Container
    Type
    Mfr.
    Each
    High-Speed Steel
    28No. 5, No. 6, No. 8, No. 10, No. 12, 1/4", 5/16", 3/8"
    		UncoatedRoundPlastic CaseLink Industries28145A610000000
     

    Drill-Point Counterbore Sets

    Image of Product. Front orientation. Counterbores. Drill-Point Counterbore Sets.
    Skip a step when installing screws of various thread diameters in metal. With a sharp point on the tip, these counterbores drill a pilot hole topped with a flat recess for the screw head. That's faster and more accurate than switching to a counterbore in between passes with your drill bit.
    High-Speed Steel—Durable and wear resistant, these counterbores make accurate cuts in most materials without chipping or cracking.
    For Screw Size
    No. of
    Pieces
    Shank
    Type
    No. of
    Flutes
    Container
    Type
    Mfr.
    Each
    Uncoated High-Speed Steel
    No. 5, No. 6, No. 8, No. 10, 1/4", 5/16", 3/8", 7/16", 1/2"
    		9Round2Plastic CaseLink Industries9940N1110000000
    No. 5, No. 6, No. 8, No. 10, 1/4", 5/16", 3/8", 7/16", 1/2"
    		9Round2Plastic CaseLink Industries9940N112000000
    M3, M4, M5, M6, M8, M10, M12, M14, M16
    		9Round2Plastic CaseLink Industries9940N113000000
     

    Drill-Point Counterbores

    Skip a step when installing screws in metal. With a sharp point on the tip, these counterbores drill a pilot hole topped with a flat recess for the screw head. That's faster and more accurate than switching to a counterbore in between passes with your drill bit.
    High-Speed Steel
    Image of Product. Front orientation. Counterbores. Drill-Point Counterbores.
    Durable and wear resistant, these counterbores make accurate cuts in most materials without chipping or cracking.
    Shank
    Uncoated
    For Screw
    Size
    Body
    Dia.
    Overall
    Lg.
    Dia.
    Type
    No. of
    Flutes
    Max. Hole
    Drilling Dp.
    Mfr.
    Each
    No. 5
    		0.220"1 7/32"1/4"Round20.25"Link Industries29445A11000000
    No. 5
    		0.220"2"1/4"Round20.414"Link Industries29445A31100000
    No. 6
    		0.242"1 7/32"1/4"Round20.25"Link Industries29445A1200000
    No. 6
    		0.242"2"1/4"Round20.45"Link Industries29445A31200000
    No. 8
    		0.290"1 15/32"5/16"Round20.281"Link Industries29445A1300000
    No. 8
    		0.290"2 1/4"3/8"Round20.534"Link Industries29445A31300000
    No. 10
    		0.332"1 1/2"5/16"Round20.312"Link Industries29445A1400000
    No. 10
    		0.332"2 1/4"3/8"Round20.6"Link Industries29445A31400000
    1/4"
    		0.406"1 3/4"7/16"Round20.375"Link Industries29445A1500000
    1/4"
    		0.406"2 3/4"3/8"Round20.84"Link Industries29445A31500000
    5/16"
    		0.490"1 15/16"1/2"Round20.375"Link Industries29445A1600000
    5/16"
    		0.490"3"1/2"Round21.02"Link Industries29445A31600000
    3/8"
    		0.593"2 11/32"5/8"Round20.468"Link Industries29445A1700000
    3/8"
    		0.593"3 1/2"1/2"Round21.218"Link Industries29445A31700000
    7/16"
    		0.687"2 1/2"5/8"Round20.5"Link Industries29445A1800000
    7/16"
    		0.687"4"1/2"Round21.404"Link Industries29445A31800000
    1/2"
    		0.781"2 11/16"5/8"Round20.562"Link Industries29445A1900000
    1/2"
    		0.781"4 1/2"1/2"Round21.596"Link Industries29445A319000000
    M3
    		5.9 mm1 1/4"1/4"Round26.35 mmLink Industries29445A2100000
    M4
    		7.5 mm1 3/8"1/4"Round27.54 mmLink Industries29445A2200000
    M5
    		9.1 mm1 1/2"5/16"Round27.94 mmLink Industries29445A2300000
    M6
    		10.7 mm1 9/16"5/16"Round29.52 mmLink Industries29445A2400000
    M8
    		13.4 mm1 13/16"7/16"Round211.11 mmLink Industries29445A2500000
    M10
    		16.6 mm2 1/16"1/2"Round214.29 mmLink Industries29445A2600000
    M12
    		18.7 mm2 7/16"5/8"Round215.87 mmLink Industries29445A2700000
    M14
    		21.8 mm2 5/8"5/8"Round216.67 mmLink Industries29445A2800000
    M16
    		24.6 mm2 3/4"5/8"Round217.46 mmLink Industries29445A2900000
     
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