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    73 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.
    Titanium Nitride (TiN) Coated—Withstand heat, corrosion, and abrasion better than uncoated and black oxide countersinks, so they stay sharp over longer periods.
    Number of Flutes—Countersinks with fewer flutes are best for aggressive cutting. They leave more room for chips to clear, reducing friction and heat. Countersinks with more flutes spread the cut across more edges for better stability, a smoother finish, and longer tool life.
    Dia.
    Uncoated
    Titanium Nitride
    (TiN) Coated
    Body
    Shank
    Drill Tip
    Dia.
    For Screw
    Size
    Overall
    Lg.
    Shank
    Type
    Mfr.
    Each
    Each
    2 Flutes
     
    82° Countersink Angle
    5/16"1/4"0.127"No. 5
    		1 3/4"RoundLink Industries28145A4100000011206N41000000
    5/16"1/4"0.140"No. 6
    		1 3/4"RoundLink Industries28145A420000011206N4200000
    7/16"1/4"0.166"No. 8
    		2"RoundLink Industries28145A430000011206N4300000
    7/16"1/4"0.192"No. 10
    		2"RoundLink Industries28145A440000011206N4400000
    7/16"1/4"0.220"No. 12
    		2"RoundLink Industries28145A450000011206N4500000
    1/2"3/8"0.252"1/4"
    		2 3/8"RoundLink Industries28145A460000011206N4600000
    5/8"3/8"0.315"5/16"
    		2 5/8"RoundLink Industries28145A470000011206N4700000
    3/4"1/2"0.378"3/8"
    		3"RoundLink Industries28145A480000011206N4800000
    1"1/2"0.503"1/2"
    		3"RoundLink Industries28145A310000011206N3100000
    1 1/8"1/2"0.625"5/8"
    		3 1/2"RoundLink Industries28145A320000011206N32000000
     
    90° Countersink Angle
    6.35 mm6.35 mm3.10 mmM3
    		44.44 mmRoundLink Industries28145A710000011206N7100000
    8.20 mm6.35 mm4.10 mmM4
    		44.44 mmRoundLink Industries28145A720000011206N7200000
    11.10 mm7.93 mm5.10 mmM5
    		50.79 mmRoundLink Industries28145A730000011206N7300000
    12.70 mm7.93 mm6.10 mmM6
    		50.79 mmRoundLink Industries28145A740000011206N7400000
    17.45 mm11.11 mm8.10 mmM8
    		66.66 mmRoundLink Industries28145A750000011206N7500000
    20.63 mm12.7 mm10.10 mmM10
    		76.19 mmRoundLink Industries28145A760000011206N7600000
    25.40 mm15.87 mm12.10 mmM12
    		76.19 mmRoundLink Industries28145A770000011206N7700000
     
    Cobalt Steel
    Image of Product. Front orientation. Countersinks. Drill-Point Countersinks for Screws, 2 Flutes.

    2 Flutes

    Tough and wear resistant, these countersinks last at least twice as long as high-speed steel. They can also run up to 25% faster at higher temperatures without chipping on hard materials, such as nickel.
    Number of Flutes—Countersinks with fewer flutes are best for aggressive cutting. They leave more room for chips to clear, reducing friction and heat. Countersinks with more flutes spread the cut across more edges for better stability, a smoother finish, and longer tool life.
    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"0.140"No. 6
    		1 3/4"RoundLink Industries11169N12000000
    7/16"1/4"0.166"No. 8
    		2"RoundLink Industries11169N1300000
    7/16"1/4"0.192"No. 10
    		2"RoundLink Industries11169N1400000
    7/16"1/4"0.220"No. 12
    		2"RoundLink Industries11169N1500000
    1/2"3/8"0.252"1/4"
    		2 3/8"RoundLink Industries11169N1600000
    5/8"3/8"0.315"5/16"
    		2 5/8"RoundLink Industries11169N1700000
    3/4"1/2"0.378"3/8"
    		3"RoundLink Industries11169N1800000
     

    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.
    82°
    Countersink Angle
    90°
    Countersink Angle
    No. of
    Flutes
    No. of
    Pieces
    For Screw Size
    Finish
    Shank
    Type
    Container
    Type
    Mfr.
    Each
    Mfr.
    Each
    High-Speed Steel
    27M3, M4, M5, M6, M8, M10, M12
    		UncoatedRoundPlastic Case————0Link Industries28145A620000000
    28No. 5, No. 6, No. 8, No. 10, No. 12, 1/4", 5/16", 3/8"
    		UncoatedRoundPlastic CaseLink Industries28145A610000000————0
     

    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
    Overall Length
    Shank
    Type
    No. of
    Flutes
    No. of
    Pieces
    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"
    		1.21875", 1.21875", 1.46875", 1.5", 1.75", 1.9375", 2.34375", 2.5", 2.6875"Round29Plastic CaseLink Industries9940N1110000000
    No. 5, No. 6, No. 8, No. 10, 1/4", 5/16", 3/8", 7/16", 1/2"
    		2", 2", 2.25", 2.25", 2.75", 3", 3.5", 4", 4.5"Round29Plastic CaseLink Industries9940N112000000
    M3, M4, M5, M6, M8, M10, M12, M14, M16
    		1.28125", 1.40625", 1.5625", 1.625", 1.90625", 2.15625", 2.5625", 2.84375", 3.5"Round29Plastic 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 SteelAbout 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.
    Drill Tip
    Dia.
    Overall
    Lg.
    Dia.
    Type
    No. of
    Flutes
    Max. Hole
    Drilling Dp.
    Mfr.
    Each
    No. 5
    		0.220"0.138"1 7/32"1/4"Round20.25"Link Industries29445A11000000
    No. 5
    		0.220"0.138"2"1/4"Round20.414"Link Industries29445A31100000
    No. 6
    		0.242"0.15"1 7/32"1/4"Round20.25"Link Industries29445A1200000
    No. 6
    		0.242"0.15"2"1/4"Round20.45"Link Industries29445A31200000
    No. 8
    		0.290"0.178"1 15/32"5/16"Round20.281"Link Industries29445A1300000
    No. 8
    		0.290"0.178"2 1/4"3/8"Round20.534"Link Industries29445A31300000
    No. 10
    		0.332"0.2"1 1/2"5/16"Round20.312"Link Industries29445A1400000
    No. 10
    		0.332"0.2"2 1/4"3/8"Round20.6"Link Industries29445A31400000
    1/4"
    		0.406"0.28"1 3/4"7/16"Round20.375"Link Industries29445A1500000
    1/4"
    		0.406"0.28"2 3/4"3/8"Round20.84"Link Industries29445A31500000
    5/16"
    		0.490"0.34"1 15/16"1/2"Round20.375"Link Industries29445A1600000
    5/16"
    		0.490"0.34"3"1/2"Round21.02"Link Industries29445A31600000
    3/8"
    		0.593"0.406"2 11/32"5/8"Round20.468"Link Industries29445A1700000
    3/8"
    		0.593"0.406"3 1/2"1/2"Round21.218"Link Industries29445A31700000
    7/16"
    		0.687"0.468"2 1/2"5/8"Round20.5"Link Industries29445A1800000
    7/16"
    		0.687"0.468"4"1/2"Round21.404"Link Industries29445A31800000
    1/2"
    		0.781"0.532"2 11/16"5/8"Round20.562"Link Industries29445A1900000
    1/2"
    		0.781"0.532"4 1/2"1/2"Round21.596"Link Industries29445A319000000
    M3
    		5.9 mm3.57 mm1 1/4"1/4"Round26.35 mmLink Industries29445A2100000
    M4
    		7.5 mm4.36 mm1 3/8"1/4"Round27.54 mmLink Industries29445A2200000
    M5
    		9.1 mm5.55 mm1 1/2"5/16"Round27.94 mmLink Industries29445A2300000
    M6
    		10.7 mm6.35 mm1 9/16"5/16"Round29.52 mmLink Industries29445A2400000
    M8
    		13.4 mm8.73 mm1 13/16"7/16"Round211.11 mmLink Industries29445A2500000
    M10
    		16.6 mm10.32 mm2 1/16"1/2"Round214.29 mmLink Industries29445A2600000
    M12
    		18.7 mm12.7 mm2 7/16"5/8"Round215.87 mmLink Industries29445A2700000
    M14
    		21.8 mm14.68 mm2 5/8"5/8"Round216.67 mmLink Industries29445A2800000
    M16
    		24.6 mm16.67 mm2 3/4"5/8"Round217.46 mmLink Industries29445A2900000
     
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