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    460 Products
    About Countersinks
    industrial info icon

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

    Countersinks for Screws

    Cut a cone-shaped opening in a hole so your flat- or oval-head screw sits flush with the surface. Choose an 82° countersink angle for inch screws or a 90° countersink angle for metric screws.
    High-Speed Steel
    Image of Product. Front orientation. Countersinks. Countersinks for Screws, 1 Flute.

    1 Flute

    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 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.
    Dia.
    Uncoated
    Titanium Nitride
    (TiN) Coated
    Body
    Shank
    Overall
    Lg.
    Shank
    Type
    Each
    Each
    1 Flute
     
    82° Countersink Angle
    1/8"1/8"1 1/4"Round2846A510000003210A212000000
    3/16"3/16"1 3/8"Round2846A29000003210A22200000
    1/4"1/4"1 1/2"Round2846A31000003210A23200000
    3/8"1/4"1 3/4"Round2846A32000003210A24200000
    1/2"1/4"2"Round2846A33000003210A25200000
    5/8"3/8"2 1/4"Round2846A52000003210A26200000
    3/4"1/2"2 5/8"Round2846A34000003210A27200000
    1"1/2"2 3/4"Round2846A35000003210A28200000
    1 1/4"1/2"2 3/4"Round2846A53000003210A292000000
    1 1/2"3/4"2 7/8"Round2846A540000003210A312000000
    1 3/4"3/4"3"Round2846A550000003210A322000000
    2"3/4"3 1/4"Round2846A560000003210A332000000
     
    90° Countersink Angle
    1/8"1/8"1 1/4"Round2846A61000003210A21300000
    3/16"3/16"1 3/8"Round2846A59000003210A22300000
    1/4"1/4"1 1/2"Round2846A36000003210A23300000
    3/8"1/4"1 3/4"Round2846A37000003210A24300000
    1/2"1/4"2"Round2846A38000003210A25300000
    5/8"3/8"2 1/4"Round2846A62000003210A26300000
    3/4"1/2"2 5/8"Round2846A39000003210A27300000
    1"1/2"2 3/4"Round2846A41000003210A28300000
    1 1/4"1/2"2 3/4"Round2846A63000003210A293000000
    1 1/2"3/4"2 7/8"Round2846A640000003210A313000000
    1 3/4"3/4"3"Round2846A650000003210A323000000
    2"3/4"3 1/4"Round2846A660000003210A333000000
     
    Cobalt Steel
    Image of Product. Front orientation. Countersinks. Countersinks for Screws, 1 Flute.

    1 Flute

    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.
    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 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.
    Dia.
    Uncoated
    Titanium Nitride
    (TiN) Coated
    Body
    Shank
    Overall
    Lg.
    Shank
    Type
    Each
    Each
    1 Flute
     
    82° Countersink Angle
    1/8"1/8"1 1/2"Round3285A3120000003213A312000000
    3/16"3/16"1 1/2"Round3285A322000003213A32200000
    1/4"1/4"2"Round3285A332000003213A33200000
    3/8"1/4"2"Round3285A342000003213A34200000
    1/2"3/8"2"Round3285A352000003213A35200000
    5/8"3/8"2 1/4"Round3285A362000003213A36200000
    3/4"1/2"2 3/4"Round3285A372000003213A37200000
    1"1/2"2 3/4"Round3285A382000003213A38200000
    1 1/4"1/2"3"Round3285A392000003213A392000000
    1 1/2"3/4"3 1/2"Round3285A4120000003213A412000000
    1 3/4"3/4"4 1/4"Round3285A4220000003213A422000000
    2"3/4"3 3/4"Round3285A4320000003213A432000000
     
    90° Countersink Angle
    1/8"1/8"1 1/2"Round3285A313000003213A31300000
    3/16"3/16"1 1/2"Round3285A323000003213A32300000
    1/4"1/4"2"Round3285A333000003213A33300000
    3/8"1/4"2"Round3285A343000003213A34300000
    1/2"3/8"2"Round3285A353000003213A35300000
    5/8"3/8"2 1/4"Round3285A363000003213A36300000
    3/4"1/2"2 3/4"Round3285A373000003213A37300000
    1"1/2"2 3/4"Round3285A383000003213A38300000
    1 1/4"1/2"3"Round3285A393000003213A393000000
    1 1/2"3/4"3 1/2"Round3285A4130000003213A413000000
    1 3/4"3/4"4 1/4"Round3285A4230000003213A423000000
    2"3/4"3 3/4"Round3285A4330000003213A433000000
     
    Carbide
    Image of Product. Front orientation. Countersinks. Countersinks for Screws, 1 Flute.

    1 Flute

    The hardest and most wear-resistant countersinks you can buy. They stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. They last 10 to 20 times longer than their closest alternative, cobalt steel. Carbide can be brittle, however, so use a rigid machine tool holder to prevent breakage.
    Titanium Carbon Nitride (TiCN) Coated—The hard, smooth finish prevents chipping and wear and reduces friction to keep material from building up.
    Titanium Aluminum Nitride (TiAlN) Coated—Harder than TiCN, these countersinks cut without chipping in iron, titanium, and other metals as hard as Rockwell C50.
    Aluminum Titanium Nitride (AlTiN) Coated—Our hardest and most wear-resistant countersinks, these cut through metals as hard as Rockwell C70 without losing their sharp cutting edges.
    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.
    Dia.
    Uncoated
    Titanium Carbon
    Nitride (TiCN) Coated
    Titanium Aluminum
    Nitride (TiAlN) Coated
    Aluminum Titanium
    Nitride (AlTiN) Coated
    Body
    Shank
    Overall
    Lg.
    Shank
    Type
    Each
    Each
    Each
    Each
    1 Flute
     
    82° Countersink Angle
    1/8"1/8"1 1/2"Round2922A170000002944A1120000002944A1150000002944A212000000
    3/16"3/16"2"Round2922A27000002944A122000002944A125000002944A21600000
    1/4"1/4"2"Round2922A1000002944A132000002944A135000002944A2200000
    5/16"1/4"2 5/8"Round2922A35000002944A825000002944A829000002944A83400000
    3/8"1/4"2 5/8"Round2922A18000002944A142000002944A145000002944A22400000
    1/2"1/4"2 5/8"Round2922A2000002944A152000002944A155000002944A22800000
    5/8"3/8"2 3/4"Round2922A19000002944A162000002944A165000002944A23200000
    3/4"3/8"2 3/4"Round2922A30000002944A1720000002944A1750000002944A236000000
    1"1/2"3"Round2922A40000002944A1820000002944A1850000002944A24000000
    1 1/4"3/4"3 1/4"Round2922A310000002944A1920000002944A1950000002944A244000000
     
    90° Countersink Angle
    1/8"1/8"1 1/2"Round2922A21000002944A113000002944A116000002944A21300000
    3/16"3/16"2"Round2922A29000002944A123000002944A126000002944A21700000
    1/4"1/4"2"Round2922A9000002944A133000002944A136000002944A22100000
    5/16"1/4"2 5/8"Round2922A36000002944A826000002944A831000002944A83500000
    3/8"1/4"2 5/8"Round2922A22000002944A143000002944A146000002944A22500000
    1/2"1/4"2 5/8"Round2922A11000002944A153000002944A156000002944A22900000
    5/8"3/8"2 3/4"Round2922A23000002944A163000002944A166000002944A23300000
    3/4"3/8"2 3/4"Round2922A120000002944A1730000002944A1760000002944A237000000
    1"1/2"3"Round2922A130000002944A1830000002944A1860000002944A241000000
    1 1/4"3/4"3 1/4"Round2922A330000002944A1930000002944A1960000002944A245000000
     

    Countersinks for Rivets

    Cut a cone-shaped opening in a hole to install your rivet flush with the surface. The 100°, 110°, and 120° countersink angles are compatible with standard rivet heads.
    High-Speed Steel
    Image of Product. Front orientation. Countersinks. Countersinks for Rivets, 1 Flute.

    1 Flute

    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 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.
    Dia.
    Uncoated
    Titanium Nitride
    (TiN) Coated
    Body
    Shank
    Overall
    Lg.
    Shank
    Type
    Each
    Each
    1 Flute
     
    100° Countersink Angle
    1/8"1/8"1 1/4"Round2846A690000003210A214000000
    3/16"3/16"1 3/8"Round2846A74000003210A22400000
    1/4"1/4"1 1/2"Round2846A75000003210A23400000
    3/8"1/4"1 3/4"Round2846A76000003210A24400000
    1/2"1/4"2"Round2846A77000003210A25400000
    5/8"3/8"2 1/4"Round2846A78000003210A26400000
    3/4"1/2"2 5/8"Round2846A79000003210A27400000
    1"1/2"2 3/4"Round2846A81000003210A28400000
    1 1/4"1/2"2 3/4"Round2846A82000003210A294000000
    1 1/2"3/4"2 7/8"Round2846A830000003210A314000000
    1 3/4"3/4"3"Round2846A840000003210A324000000
    2"3/4"3 1/4"Round2846A850000003210A334000000
     
    120° Countersink Angle
    1/8"1/8"1 1/4"Round2846A101000003210A21500000
    3/16"3/16"1 3/8"Round2846A102000003210A22500000
    1/4"1/4"1 1/2"Round2846A103000003210A23500000
    3/8"1/4"1 3/4"Round2846A104000003210A24500000
    1/2"1/4"2"Round2846A105000003210A25500000
    5/8"3/8"2 1/4"Round2846A106000003210A26500000
    3/4"1/2"2 5/8"Round2846A107000003210A27500000
    1"1/2"2 3/4"Round2846A108000003210A28500000
    1 1/4"1/2"2 3/4"Round2846A109000003210A295000000
    1 1/2"3/4"2 7/8"Round2846A1120000003210A315000000
    1 3/4"3/4"3"Round2846A1130000003210A325000000
    2"3/4"3 1/4"Round2846A1140000003210A335000000
     
    Cobalt Steel
    Image of Product. Front orientation. Countersinks. Countersinks for Rivets, 1 Flute.

    1 Flute

    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.
    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 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.
    Dia.
    Uncoated
    Titanium Nitride
    (TiN) Coated
    Body
    Shank
    Overall
    Lg.
    Shank
    Type
    Each
    Each
    1 Flute
     
    100° Countersink Angle
    1/8"1/8"1 1/2"Round3285A314000003213A314000000
    3/16"3/16"1 1/2"Round3285A324000003213A32400000
    1/4"1/4"2"Round3285A334000003213A33400000
    3/8"1/4"2"Round3285A344000003213A34400000
    1/2"3/8"2"Round3285A354000003213A35400000
    5/8"3/8"2 1/4"Round3285A364000003213A36400000
    3/4"1/2"2 3/4"Round3285A374000003213A37400000
    1"1/2"2 3/4"Round3285A384000003213A38400000
    1 1/4"1/2"3"Round3285A394000003213A394000000
    1 1/2"3/4"3 1/2"Round———03213A414000000
     
    120° Countersink Angle
    1/8"1/8"1 1/2"Round3285A31500003213A31500000
    3/16"3/16"1 1/2"Round3285A325000003213A32500000
    1/4"1/4"2"Round3285A335000003213A33500000
    3/8"1/4"2"Round3285A345000003213A34500000
    1/2"3/8"2"Round3285A355000003213A35500000
    5/8"3/8"2 1/4"Round3285A365000003213A36500000
    3/4"1/2"2 3/4"Round3285A375000003213A37500000
    1"1/2"2 3/4"Round3285A385000003213A38500000
    1 1/4"1/2"3"Round3285A395000003213A395000000
    1 1/2"3/4"3 1/2"Round3285A4150000003213A415000000
    1 3/4"3/4"4 1/4"Round———03213A425000000
     
    Carbide
    Image of Product. Front orientation. Countersinks. Countersinks for Rivets, 1 Flute.

    1 Flute

    The hardest and most wear-resistant countersinks you can buy. They stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. They last 10 to 20 times longer than their closest alternative, cobalt steel. Carbide can be brittle, however, so use a rigid machine tool holder to prevent breakage.
    Titanium Carbon Nitride (TiCN) Coated—The hard, smooth finish prevents chipping and wear and reduces friction to keep material from building up.
    Titanium Aluminum Nitride (TiAlN) Coated—Harder than TiCN, these countersinks cut without chipping in iron, titanium, and other metals as hard as Rockwell C50.
    Aluminum Titanium Nitride (AlTiN) Coated—Our hardest and most wear-resistant countersinks, these cut through metals as hard as Rockwell C70 without losing their sharp cutting edges.
    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.
    Dia.
    Uncoated
    Titanium Carbon
    Nitride (TiCN) Coated
    Titanium Aluminum
    Nitride (TiAlN) Coated
    Aluminum Titanium
    Nitride (AlTiN) Coated
    Body
    Shank
    Overall
    Lg.
    Shank
    Type
    Each
    Each
    Each
    Each
    1 Flute
     
    100° Countersink Angle
    1/8"1/8"1 1/2"Round2922A4310000002944A1170000002944A1180000002944A214000000
    3/16"3/16"2"Round2922A432000002944A127000002944A128000002944A21800000
    1/4"1/4"2"Round2922A433000002944A137000002944A138000002944A22200000
    5/16"1/4"2 5/8"Round2922A37000002944A827000002944A832000002944A83600000
    3/8"1/4"2 5/8"Round2922A434000002944A147000002944A148000002944A22600000
    1/2"1/4"2 5/8"Round2922A435000002944A157000002944A158000002944A2300000
    5/8"3/8"2 3/4"Round2922A436000002944A167000002944A168000002944A23400000
    3/4"3/8"2 3/4"Round2922A4370000002944A1770000002944A1780000002944A238000000
    1"1/2"3"Round2922A4380000002944A1870000002944A1880000002944A242000000
    1 1/4"3/4"3 1/4"Round2922A4390000002944A1970000002944A1980000002944A246000000
     

    Countersinks for Lathe Centers

    Keep your workpiece aligned as it spins between lathe centers. These countersinks match the 60° angle on both rotating and stationary centers.
    High-Speed Steel
    Image of Product. Front orientation. Countersinks. Countersinks for Lathe Centers, 1 Flute.

    1 Flute

    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 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.
    Dia.
    Uncoated
    Titanium Nitride
    (TiN) Coated
    Body
    Shank
    Overall
    Lg.
    Shank
    Type
    Each
    Each
    1 Flute
     
    60° Countersink Angle
    1/8"1/8"1 1/4"Round2846A110000003210A211000000
    3/16"3/16"1 3/8"Round2846A19000003210A22100000
    1/4"1/4"1 1/2"Round2846A21000003210A23100000
    3/8"1/4"1 3/4"Round2846A22000003210A24100000
    1/2"1/4"2"Round2846A23000003210A25100000
    5/8"3/8"2 1/4"Round2846A12000003210A26100000
    3/4"1/2"2 5/8"Round2846A24000003210A27100000
    1"1/2"2 3/4"Round2846A25000003210A28100000
    1 1/4"1/2"2 3/4"Round2846A13000003210A291000000
    1 1/2"3/4"2 7/8"Round2846A140000003210A311000000
    1 3/4"3/4"3"Round2846A150000003210A321000000
    2"3/4"3 1/4"Round2846A160000003210A331000000
     
    Cobalt Steel
    Image of Product. Front orientation. Countersinks. Countersinks for Lathe Centers, 1 Flute.

    1 Flute

    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.
    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 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.
    Dia.
    Uncoated
    Titanium Nitride
    (TiN) Coated
    Body
    Shank
    Overall
    Lg.
    Shank
    Type
    Each
    Each
    1 Flute
     
    60° Countersink Angle
    1/8"1/8"1 1/2"Round3285A3110000003213A311000000
    3/16"3/16"1 1/2"Round3285A321000003213A32100000
    1/4"1/4"2"Round3285A331000003213A33100000
    3/8"1/4"2"Round3285A341000003213A34100000
    1/2"3/8"2"Round3285A351000003213A35100000
    5/8"3/8"2 1/4"Round3285A361000003213A36100000
    3/4"1/2"2 3/4"Round3285A371000003213A37100000
    1"1/2"2 3/4"Round3285A381000003213A38100000
    1 1/4"1/2"3"Round3285A391000003213A391000000
    1 1/2"3/4"3 1/2"Round3285A4110000003213A411000000
    2"3/4"3 3/4"Round———03213A431000000
     
    Carbide
    Image of Product. Front orientation. Countersinks. Countersinks for Lathe Centers, 1 Flute.

    1 Flute

    The hardest and most wear-resistant countersinks you can buy. They stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. They last 10 to 20 times longer than their closest alternative, cobalt steel. Carbide can be brittle, however, so use a rigid machine tool holder to prevent breakage.
    Titanium Carbon Nitride (TiCN) Coated—The hard, smooth finish prevents chipping and wear and reduces friction to keep material from building up.
    Titanium Aluminum Nitride (TiAlN) Coated—Harder than TiCN, these countersinks cut without chipping in iron, titanium, and other metals as hard as Rockwell C50.
    Aluminum Titanium Nitride (AlTiN) Coated—Our hardest and most wear-resistant countersinks, these cut through metals as hard as Rockwell C70 without losing their sharp cutting edges.
    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.
    Dia.
    Uncoated
    Titanium Carbon
    Nitride (TiCN) Coated
    Titanium Aluminum
    Nitride (TiAlN) Coated
    Aluminum Titanium
    Nitride (AlTiN) Coated
    Body
    Shank
    Overall
    Lg.
    Shank
    Type
    Each
    Each
    Each
    Each
    1 Flute
     
    60° Countersink Angle
    1/8"1/8"1 1/2"Round2922A140000002944A1110000002944A1140000002944A211000000
    3/16"3/16"2"Round2922A28000002944A121000002944A124000002944A21500000
    1/4"1/4"2"Round2922A5000002944A131000002944A134000002944A21900000
    5/16"1/4"2 5/8"Round2922A34000002944A824000002944A828000002944A83300000
    3/8"1/4"2 5/8"Round2922A15000002944A141000002944A144000002944A22300000
    1/2"1/4"2 5/8"Round2922A6000002944A151000002944A154000002944A22700000
    5/8"3/8"2 3/4"Round2922A16000002944A161000002944A164000002944A23100000
    3/4"3/8"2 3/4"Round2922A70000002944A1710000002944A1740000002944A235000000
    1"1/2"3"Round2922A80000002944A1810000002944A1840000002944A239000000
    1 1/4"3/4"3 1/4"Round2922A320000002944A1910000002944A1940000002944A243000000
     

    Countersink Sets for Screws

    Image of Product. Front orientation. Countersinks. Countersink Sets for Screws.
    Cut cone-shaped recesses for screws of various diameters so the screw head sit flush with the surface. Choose an 82° countersink angle for inch screws or a 90° countersink angle for metric screws.
    High-Speed Steel—These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.
    Carbide—The hardest and most wear-resistant countersinks you can buy. They stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. They last 10 to 20 times longer than their closest alternative, cobalt steel. Carbide can be brittle, however, so use a rigid machine tool holder to prevent breakage.
    Titanium Nitride (TiN) Coated—Withstand heat, corrosion, and abrasion better than uncoated and black oxide countersinks, so they stay sharp over longer periods.
    Titanium Carbon Nitride (TiCN) Coated—The hard, smooth finish prevents chipping and wear and reduces friction to keep material from building up.
    Titanium Aluminum Nitride (TiAlN) Coated—Harder than TiCN, these countersinks cut without chipping in iron, titanium, and other metals as hard as Rockwell C50.
    Aluminum Titanium Nitride (AlTiN) Coated—Our hardest and most wear-resistant countersinks, these cut through metals as hard as Rockwell C70 without losing their sharp cutting edges.
    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.
    82°
    Countersink Angle
    90°
    Countersink Angle
    No. of
    Flutes
    Body Dia. Included
    No. of
    Pieces
    Finish
    Shank
    Type
    Container
    Type
    Each
    Each
    High-Speed Steel
    11/4", 1/2", 3/4", 1"4Titanium Nitride (TiN) CoatedRoundPlastic Case3210A81100000003210A8120000000
    11/4", 3/8", 1/2", 3/4", 1"5UncoatedRoundPlastic Case2846A710000002846A73000000
     
    Carbide
    11/4", 3/8", 1/2", 5/8", 3/4"5UncoatedRoundMetal Case2922A240000002922A26000000
    11/4", 3/8", 1/2", 5/8", 3/4"5Titanium Carbon Nitride (TiCN) CoatedRoundMetal Case2944A7120000002944A713000000
    11/4", 3/8", 1/2", 5/8", 3/4"5Titanium Aluminum Nitride (TiAlN) CoatedRoundMetal Case2944A7150000002944A716000000
    11/4", 3/8", 1/2", 5/8", 3/4"5Aluminum Titanium Nitride (AlTiN) CoatedRoundMetal Case2944A7420000002944A743000000
     

    Carbide-Insert Countersinks for Screws

    Your best bet for countersinking dozens or even hundreds of holes economically. When the blade begins to wear, rotate the insert to expose a fresh cutting edge. Once all the edges are worn, pop on a new insert instead of sharpening or throwing away your countersink.
    Carbide
    Image of ProductInUse. With Square Insert. Front orientation. Countersinks. Carbide-Insert Countersinks for Screws, 1 Flute.

    With Square

    Insert

    The hardest and most wear-resistant countersinks you can buy. They stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. They last 10 to 20 times longer than their closest alternative, cobalt steel. Carbide can be brittle, however, so use a rigid machine tool holder to prevent breakage.
    Countersinks
    Replacement
    Screws
    Insert
    Uncoated
    Shank
    Dia.
    For Hole Dia.
    For Min.
    Hole Dia.
    Overall
    Lg.
    Shank
    Type
    Shape
    Code
    Size
    Thk.
    Each
    Each
    1 Flute
     
    82° Countersink Angle
    1/2"1/4" to 3/4"1/4"2 3/8"RoundTriangleTPGH-3213/8"1/8"29245A61000000029245A9600000
    1/2"1/2" to 1 3/4"1/2"2 3/8"RoundSquareSPGH-4331/2"3/16"29245A6200000029245A960000
    3/4"1 1/4" to 2 1/2"1 1/4"2 3/8"RoundSquareSPGH-4331/2"3/16"29245A6300000029245A960000
     
    90° Countersink Angle
    1/2"1/4" to 3/4"1/4"2 3/8"RoundTriangleTPGH-3213/8"1/8"29245A6400000029245A960000
    1/2"1/2" to 1 3/4"1/2"2 3/8"RoundSquareSPGH-4331/2"3/16"29245A6500000029245A960000
    3/4"1 1/4" to 2 1/2"1 1/4"2 3/8"RoundSquareSPGH-4331/2"3/16"29245A6600000029245A960000
     
    Replacement Carbide Inserts
    Uncoated Triangle Carbide Insert29245A67 Each 00000
    Uncoated Triangle Carbide Inserts29245A188 Pkg. of 10 00000
    Uncoated Square Carbide Insert29245A68 Each 00000
    Uncoated Square Carbide Inserts29245A291 Pkg. of 10 000000
    Titanium Nitride (TiN) Coated Triangle Carbide Insert29245A71 Each 00000
    Titanium Nitride (TiN) Coated Triangle Carbide Inserts29245A306 Pkg. of 10 00000
    Titanium Nitride (TiN) Coated Square Carbide Insert29245A72 Each 00000
    Titanium Nitride (TiN) Coated Square Carbide Inserts29245A918 Pkg. of 10 000000

    Countersinks with Two Countersinking Ends for Screws

    When one end starts to wear, flip the tool around for a fresh cutting edge.
    High-Speed Steel
    Image of Product. Front orientation. Countersinks. Countersinks with Two Countersinking Ends for Screws, 1 Flute.

    1 Flute

    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.
    Dia.
    Uncoated
    Body
    Shank
    Overall
    Lg.
    Shank
    Type
    Each
    1 Flute
     
    82° Countersink Angle
    1/8"1/8"1 1/2"Round27885A911000000
    3/16"3/16"2"Round27885A91200000
    1/4"1/4"2"Round27885A91300000
    5/16"5/16"2 1/2"Round27885A91400000
    3/8"3/8"2 1/2"Round27885A91500000
    1/2"1/2"3"Round27885A91600000
    5/8"5/8"3 1/2"Round27885A91700000
     
    90° Countersink Angle
    1/8"1/8"1 1/2"Round27885A91800000
    3/16"3/16"2"Round27885A91900000
    1/4"1/4"2"Round27885A92100000
    5/16"5/16"2 1/2"Round27885A92200000
    3/8"3/8"2 1/2"Round27885A92300000
    1/2"1/2"3"Round27885A92400000
     

    Long-Reach Countersinks for Screws

    At around twice the length of our standard countersinks, these give you access to hard-to-reach holes. They're more prone to wobbling than shorter countersinks, so consider using a drill press or other rigid tool setup.
    High-Speed Steel
    Image of Product. Front orientation. Countersinks. Long-Reach Countersinks for Screws, 1 Flute.

    1 Flute

    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.
    Dia.
    Uncoated
    Body
    Shank
    Overall
    Lg.
    Shank
    Type
    Each
    1 Flute
     
    82° Countersink Angle
    1/8"1/8"4"Round3172A11000000
    3/16"3/16"4"Round3172A1200000
    1/4"1/4"6"Round3172A1300000
    5/16"5/16"6"Round3172A1400000
    3/8"3/8"6"Round3172A1500000
    1/2"3/8"6"Round3172A1600000
    5/8"3/8"6"Round3172A1700000
    3/4"1/2"6"Round3172A1800000
    1"1/2"6"Round3172A1900000
     

    Countersink Hand Tools

    Image of Product. Front orientation. Countersinks. Countersink Hand Tools.
    This versatile hand tool countersinks, chamfers, and deburrs in a single pass. If the hole is partially obstructed, the angled shank gives you access from the side. The tool comes in a plastic case with five countersinks to create cone-shaped openings for screw heads of different diameters.
    High-Speed Steel—These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.
    90°
    Countersink Angle
    No. of
    Flutes
    Body Dia. Included
    No. of
    Pieces
    Finish
    Includes
    Shank
    Type
    Container
    Type
    Each
    High-Speed Steel
    11/8", 1/4", 5/16", 3/8"5Uncoated5" Lg. Plastic HandleRoundPlastic Case28775A61000000
     
    Replacements for Countersinks
    Each
    5" Long Plastic Handle28775A6700000
    1/8" Countersink28775A620000
    1/4" Countersink28775A6300000
    5/16" Countersink28775A6400000
    3/8" Countersink28775A6500000

    Carbide-Insert Countersinks for Lathe Centers

    Your best bet for countersinking dozens or even hundreds of holes economically. When the blade begins to wear, rotate the insert to expose a fresh cutting edge. Once all the edges are worn, pop on a new insert instead of sharpening or throwing away your countersink.
    Carbide
    Image of ProductInUse. With Square Insert. Front orientation. Countersinks. Carbide-Insert Countersinks for Lathe Centers, 1 Flute.

    With Square

    Insert

    The hardest and most wear-resistant countersinks you can buy. They stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. They last 10 to 20 times longer than their closest alternative, cobalt steel. Carbide can be brittle, however, so use a rigid machine tool holder to prevent breakage.
    Countersinks
    Replacement
    Screws
    Insert
    Uncoated
    Shank
    Dia.
    For Hole Dia.
    For Min.
    Hole Dia.
    Overall
    Lg.
    Shank
    Type
    Shape
    Code
    Size
    Thk.
    Each
    Each
    1 Flute
     
    60° Countersink Angle
    1/2"1/4" to 3/4"1/4"2 3/8"RoundTriangleTPGH-3213/8"1/8"29245A57000000029245A9600000
    1/2"1/2" to 1 3/4"1/2"2 3/4"RoundSquareSPGH-4331/2"3/16"29245A5800000029245A960000
    3/4"1 1/4" to 2 1/2"1 1/4"2 3/4"RoundSquareSPGH-4331/2"3/16"29245A5900000029245A960000
     
    Replacement Carbide Inserts
    Uncoated Triangle Carbide Insert29245A67 Each 00000
    Uncoated Triangle Carbide Inserts29245A188 Pkg. of 10 00000
    Uncoated Square Carbide Insert29245A68 Each 00000
    Uncoated Square Carbide Inserts29245A291 Pkg. of 10 000000
    Titanium Nitride (TiN) Coated Triangle Carbide Insert29245A71 Each 00000
    Titanium Nitride (TiN) Coated Triangle Carbide Inserts29245A306 Pkg. of 10 00000
    Titanium Nitride (TiN) Coated Square Carbide Insert29245A72 Each 00000
    Titanium Nitride (TiN) Coated Square Carbide Inserts29245A918 Pkg. of 10 000000

    Carbide-Insert Countersinks for Rivets

    Your best bet for countersinking dozens or even hundreds of holes economically. When the blade begins to wear, rotate the insert to expose a fresh cutting edge. Once all the edges are worn, pop on a new insert instead of sharpening or throwing away your countersink.
    Carbide
    Image of ProductInUse. With Square Insert. Front orientation. Countersinks. Carbide-Insert Countersinks for Rivets, 1 Flute.

    With Square

    Insert

    The hardest and most wear-resistant countersinks you can buy. They stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. They last 10 to 20 times longer than their closest alternative, cobalt steel. Carbide can be brittle, however, so use a rigid machine tool holder to prevent breakage.
    Countersinks
    Replacement
    Screws
    Insert
    Uncoated
    Shank
    Dia.
    For Hole Dia.
    For Min.
    Hole Dia.
    Overall
    Lg.
    Shank
    Type
    Shape
    Code
    Size
    Thk.
    Each
    Each
    1 Flute
     
    100° Countersink Angle
    1/2"1/4" to 3/4"1/4"2 3/8"RoundTriangleTPGH-3213/8"1/8"29245A81000000029245A9600000
    1/2"1/2" to 1 3/4"1/2"2 3/8"RoundSquareSPGH-4331/2"3/16"29245A8200000029245A960000
    3/4"1 1/4" to 2 1/2"1 1/4"2 3/8"RoundSquareSPGH-4331/2"3/16"29245A8300000029245A960000
     
    Replacement Carbide Inserts
    Uncoated Triangle Carbide Insert29245A67 Each 00000
    Uncoated Triangle Carbide Inserts29245A188 Pkg. of 10 00000
    Uncoated Square Carbide Insert29245A68 Each 00000
    Uncoated Square Carbide Inserts29245A291 Pkg. of 10 000000
    Titanium Nitride (TiN) Coated Triangle Carbide Insert29245A71 Each 00000
    Titanium Nitride (TiN) Coated Triangle Carbide Inserts29245A306 Pkg. of 10 00000
    Titanium Nitride (TiN) Coated Square Carbide Insert29245A72 Each 00000
    Titanium Nitride (TiN) Coated Square Carbide Inserts29245A918 Pkg. of 10 000000

    Countersink Sets for Lathe Centers

    Image of Product. Front orientation. Countersinks. Countersink Sets for Lathe Centers.
    Cut holes for a range of lathe-center diameters. The 60° angle creates a precise recess for both rotating and stationary lathe centers, keeping your workpiece aligned as it spins.
    High-Speed Steel—These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.
    Carbide—The hardest and most wear-resistant countersinks you can buy. They stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. They last 10 to 20 times longer than their closest alternative, cobalt steel. Carbide can be brittle, however, so use a rigid machine tool holder to prevent breakage.
    Titanium Carbon Nitride (TiCN) Coated—The hard, smooth finish prevents chipping and wear and reduces friction to keep material from building up.
    Titanium Aluminum Nitride (TiAlN) Coated—Harder than TiCN, these countersinks cut without chipping in iron, titanium, and other metals as hard as Rockwell C50.
    Aluminum Titanium Nitride (AlTiN) Coated—Our hardest and most wear-resistant countersinks, these cut through metals as hard as Rockwell C70 without losing their sharp cutting edges.
    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.
    60°
    Countersink Angle
    No. of
    Flutes
    Body Dia. Included
    No. of
    Pieces
    Finish
    Shank
    Type
    Container
    Type
    Each
    High-Speed Steel
    11/4", 3/8", 1/2", 3/4", 1"5UncoatedRoundPlastic Case2846A720000000
     
    Carbide
    11/4", 3/8", 1/2", 5/8", 3/4"5UncoatedRoundMetal Case2922A25000000
    11/4", 3/8", 1/2", 5/8", 3/4"5Titanium Carbon Nitride (TiCN) CoatedRoundMetal Case2944A711000000
    11/4", 3/8", 1/2", 5/8", 3/4"5Titanium Aluminum Nitride (TiAlN) CoatedRoundMetal Case2944A714000000
    11/4", 3/8", 1/2", 5/8", 3/4"5Aluminum Titanium Nitride (AlTiN) CoatedRoundMetal Case2944A741000000
     

    Countersink Sets for Rivets

    Image of Product. Front orientation. Countersinks. Countersink Sets for Rivets.
    Cut cone-shaped recesses for rivets of various diameters so the head sits flush with the surface.
    High-Speed Steel—These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.
    Carbide—The hardest and most wear-resistant countersinks you can buy. They stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. They last 10 to 20 times longer than their closest alternative, cobalt steel. Carbide can be brittle, however, so use a rigid machine tool holder to prevent breakage.
    Titanium Carbon Nitride (TiCN) Coated—The hard, smooth finish prevents chipping and wear and reduces friction to keep material from building up.
    Titanium Aluminum Nitride (TiAlN) Coated—Harder than TiCN, these countersinks cut without chipping in iron, titanium, and other metals as hard as Rockwell C50.
    Aluminum Titanium Nitride (AlTiN) Coated—Our hardest and most wear-resistant countersinks, these cut through metals as hard as Rockwell C70 without losing their sharp cutting edges.
    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.
    100°
    Countersink Angle
    No. of
    Flutes
    Body Dia. Included
    No. of
    Pieces
    Finish
    Shank
    Type
    Container
    Type
    Each
    High-Speed Steel
    11/4", 3/8", 1/2", 3/4", 1"5UncoatedRoundPlastic Case2846A1160000000
     
    Carbide
    11/4", 3/8", 1/2", 5/8", 3/4"5UncoatedRoundMetal Case2922A441000000
    11/4", 3/8", 1/2", 5/8", 3/4"5Titanium Carbon Nitride (TiCN) CoatedRoundMetal Case2944A718000000
    11/4", 3/8", 1/2", 5/8", 3/4"5Titanium Aluminum Nitride (TiAlN) CoatedRoundMetal Case2944A717000000
    11/4", 3/8", 1/2", 5/8", 3/4"5Aluminum Titanium Nitride (AlTiN) CoatedRoundMetal Case2944A744000000
     
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