McMaster-Carr logo
    Filter by
    Countersink Angle
    Industrial Info Compare
    Attribute Image
    System of Measurement
    Number of Flutes
    Material
    Shank Type
    Shank Material
    For Cutting
    Number of Countersinking Ends
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    DFARS Specialty Metals
    Body Diameters Included
    Shank Diameters Included
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    348 Products
    About Countersinks
    industrial info icon

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

    Material

    Material

    Flute Type

    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
    These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.
    Black Oxide—The dark finish increases wear resistance and reduces friction to improve chip flow, so these can last 50% longer than uncoated countersinks.
    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
    Black Oxide
    Titanium Nitride
    (TiN) Coated
    Body
    Shank
    Overall
    Lg.
    Shank
    Type
    Each
    Each
    Each
    1 Flute
    Image of Product. Front orientation. Countersinks. Countersinks for Rivets, 1 Flute.
     
    100° Countersink Angle
    1/8"1/8"1 1/4"Round0000000000000———000000000000000
    3/16"3/16"1 3/8"Round000000000000———00000000000000
    1/4"1/4"1 1/2"Round000000000000———00000000000000
    3/8"1/4"1 3/4"Round000000000000———00000000000000
    1/2"1/4"2"Round000000000000———00000000000000
    5/8"3/8"2 1/4"Round000000000000———00000000000000
    3/4"1/2"2 5/8"Round000000000000———00000000000000
    1"1/2"2 3/4"Round000000000000———00000000000000
    1 1/4"1/2"2 3/4"Round000000000000———000000000000000
    1 1/2"3/4"2 7/8"Round0000000000000———000000000000000
    1 3/4"3/4"3"Round0000000000000———000000000000000
    2"3/4"3 1/4"Round0000000000000———000000000000000
     
    3 Flutes
    Image of Product. Front orientation. Countersinks. Countersinks for Rivets, 3 Flutes.
     
    100° Countersink Angle
    1/4"1/4"1 1/2"Round000000000000———0———0
    1/4"1/4"2"Round———0———00000000000000
    3/8"1/4"1 3/4"Round000000000000———0———0
    3/8"1/4"2"Round———0———00000000000000
    1/2"1/4"2"Round000000000000———0———0
    1/2"3/8"2"Round———0———00000000000000
    5/8"3/8"2 1/4"Round000000000000———00000000000000
    3/4"1/2"2 5/8"Round000000000000———0———0
    3/4"1/2"2 3/4"Round———0———00000000000000
    1"1/2"2 3/4"Round000000000000———00000000000000
     
    6 Flutes
    Image of Product. Front orientation. Countersinks. Countersinks for Rivets, 6 Flutes.
     
    100° Countersink Angle
    1/8"1/8"1 1/4"Round———0000000000000000000000000000
    3/16"3/16"1 3/8"Round———00000000000000000000000000
    1/4"1/4"1 1/2"Round———00000000000000000000000000
    5/16"1/4"1 3/4"Round———00000000000000000000000000
    3/8"1/4"1 3/4"Round———00000000000000000000000000
    1/2"3/8"2"Round———00000000000000000000000000
    5/8"3/8"2 1/4"Round———00000000000000000000000000
    3/4"1/2"2 5/8"Round———00000000000000000000000000
    7/8"1/2"2 3/4"Round———00000000000000000000000000
    1"1/2"2 3/4"Round———00000000000000000000000000
    1 1/4"1/2"2 3/4"Round———00000000000000000000000000
    1 1/2"3/4"2 7/8"Round———0000000000000000000000000000
    2"3/4"3 1/4"Round———0000000000000000000000000000
     
    Cobalt Steel
    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.
    Black Oxide—The dark finish increases wear resistance and reduces friction to improve chip flow, so these can last 50% longer than uncoated countersinks.
    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
    Black Oxide
    Titanium Nitride
    (TiN) Coated
    Body
    Shank
    Overall
    Lg.
    Shank
    Type
    Each
    Each
    Each
    1 Flute
    Image of Product. Front orientation. Countersinks. Countersinks for Rivets, 1 Flute.
     
    100° Countersink Angle
    1/8"1/8"1 1/2"Round0000000000000———000000000000000
    3/16"3/16"1 1/2"Round0000000000000———00000000000000
    1/4"1/4"2"Round0000000000000———00000000000000
    3/8"1/4"2"Round0000000000000———00000000000000
    1/2"3/8"2"Round0000000000000———00000000000000
    5/8"3/8"2 1/4"Round0000000000000———00000000000000
    3/4"1/2"2 3/4"Round0000000000000———00000000000000
    1"1/2"2 3/4"Round0000000000000———00000000000000
    1 1/4"1/2"3"Round0000000000000———000000000000000
    1 1/2"3/4"3 1/2"Round———0———000000000000000
     
    3 Flutes
    Image of Product. Front orientation. Countersinks. Countersinks for Rivets, 3 Flutes.
     
    100° Countersink Angle
    1/4"1/4"2"Round0000000000000———00000000000000
    3/8"1/4"2"Round0000000000000———00000000000000
    1/2"3/8"2"Round0000000000000———00000000000000
    5/8"3/8"2 1/4"Round0000000000000———00000000000000
    3/4"1/2"2 3/4"Round0000000000000———00000000000000
    1"1/2"2 3/4"Round0000000000000———00000000000000
     
    6 Flutes
    Image of Product. Front orientation. Countersinks. Countersinks for Rivets, 6 Flutes.
     
    100° Countersink Angle
    1/8"1/8"1 1/4"Round———00000000000000———0
    1/8"1/8"1 1/2"Round———0———00000000000000
    3/16"3/16"1 3/8"Round———00000000000000———0
    3/16"3/16"1 1/2"Round———0———00000000000000
    1/4"1/4"1 1/2"Round———00000000000000———0
    1/4"1/4"2"Round———0———00000000000000
    5/16"1/4"1 1/2"Round———00000000000000———0
    5/16"1/4"2"Round———0———00000000000000
    3/8"1/4"1 3/4"Round———00000000000000———0
    3/8"1/4"2"Round———0———00000000000000
    1/2"3/8"2"Round———000000000000000000000000000
    5/8"3/8"2 1/4"Round———000000000000000000000000000
    3/4"1/2"2 5/8"Round———00000000000000———0
    3/4"1/2"2 3/4"Round———0———00000000000000
    7/8"1/2"2 3/4"Round———000000000000000000000000000
    1"1/2"2 3/4"Round———000000000000000000000000000
    1 1/4"1/2"2 3/4"Round———00000000000000———0
    1 1/2"3/4"2 7/8"Round———00000000000000000000000000000
    2"3/4"3 1/4"Round———00000000000000000000000000000
     
    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.
    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
    Image of Product. Front orientation. Countersinks. Countersinks for Rivets, 1 Flute.
     
    100° Countersink Angle
    1/8"1/8"1 1/2"Round00000000000000000000000000000000000000000000000000000000
    3/16"3/16"2"Round0000000000000000000000000000000000000000000000000000
    1/4"1/4"2"Round0000000000000000000000000000000000000000000000000000
    5/16"1/4"2 5/8"Round000000000000000000000000000000000000000000000000000
    3/8"1/4"2 5/8"Round0000000000000000000000000000000000000000000000000000
    1/2"1/4"2 5/8"Round000000000000000000000000000000000000000000000000000
    5/8"3/8"2 3/4"Round0000000000000000000000000000000000000000000000000000
    3/4"3/8"2 3/4"Round00000000000000000000000000000000000000000000000000000000
    1"1/2"3"Round00000000000000000000000000000000000000000000000000000000
    1 1/4"3/4"3 1/4"Round00000000000000000000000000000000000000000000000000000000
     
    3 Flutes
    Image of Product. Front orientation. Countersinks. Countersinks for Rivets, 3 Flutes.
     
    100° Countersink Angle
    1/8"1/8"1 1/2"Round00000000000000000000000000000000000000000000000000000
    3/16"3/16"2"Round00000000000000000000000000000000000000000000000000000
    1/4"1/4"2"Round00000000000000000000000000000000000000000000000000000
    5/16"1/4"2 5/8"Round00000000000000000000000000000000000000000000000000000
    3/8"1/4"2 5/8"Round00000000000000000000000000000000000000000000000000000
    1/2"1/4"2 5/8"Round00000000000000000000000000000000000000000000000000000
    5/8"3/8"2 3/4"Round00000000000000000000000000000000000000000000000000000
    3/4"3/8"2 3/4"Round00000000000000000000000000000000000000000000000000000000
    1"1/2"3"Round000000000000000000000000000000000000000000000000000000000
    1 1/4"3/4"3 1/4"Round000000000000000000000000000000000000000000000000000000000
     
    6 Flutes
    Image of Product. Front orientation. Countersinks. Countersinks for Rivets, 6 Flutes.
     
    100° Countersink Angle
    1/8"1/8"1 1/2"Round0000000000000000000000000000000000000000000000000000
    3/16"3/16"2"Round0000000000000000000000000000000000000000000000000000
    1/4"1/4"2"Round0000000000000000000000000000000000000000000000000000
    5/16"1/4"2 5/8"Round0000000000000000000000000000000000000000000000000000
    3/8"1/4"2 5/8"Round0000000000000000000000000000000000000000000000000000
    1/2"1/4"2 5/8"Round0000000000000000000000000000000000000000000000000000
    5/8"3/8"2 3/4"Round0000000000000000000000000000000000000000000000000000
    3/4"3/8"2 3/4"Round0000000000000000000000000000000000000000000000000000000
    1"1/2"3"Round00000000000000000000000000000000000000000000000000000000
    1 1/4"3/4"3 1/4"Round00000000000000000000000000000000000000000000000000000000
    1 1/2"3/4"3 1/4"Round00000000000000000000000000000000000000000000000000000000
     

    Fluteless Smooth-Finish Countersinks for Rivets

    Image of Product. Front orientation. Countersinks. Fluteless Smooth-Finish Countersinks for Rivets.
    With a hollow body and single cutting edge, these countersinks make less contact with the hole than solid-body countersinks. The reduced friction minimizes vibration and leaves a more accurate, tight-fitting recess for your screw head.
    High-Speed Steel
    These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.
    Dia.
    Uncoated
    For Hole Dia.
    Body
    Shank
    Overall
    Lg.
    Shank
    Type
    Each
    0 Flutes
     
    100° Countersink Angle
    5/32" to 13/32"7/16"1/4"1 21/32"Round0000000000000
    3/16" to 17/32"9/16"1/4"1 7/8"Round000000000000
    5/16" to 25/32"13/16"1/2"2 5/8"Round000000000000
    9/16" to 1 1/16"1 1/8"1/2"2 29/32"Round000000000000
     

    Smooth-Finish Countersinks for Rivets

    Make smooth, uniform cuts without stopping to clear chips. Spiral-flute cutting edges lift chips out of the hole as you cut so they don't clog the tool.
    High-Speed Steel
    Image of Product. Front orientation. Countersinks. Smooth-Finish Countersinks for Rivets, 3 Flutes.

    3 Flutes

    These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.
    Dia.
    Uncoated
    Body
    Shank
    Overall
    Lg.
    Shank
    Type
    Each
    3 Flutes
     
    100° Countersink Angle
    1/4"1/4"1 1/4"Round0000000000000
    3/8"1/4"1 5/8"Round000000000000
    1/2"1/4"2"Round000000000000
    5/8"1/4"2 1/4"Round000000000000
    3/4"1/2"3"Round000000000000
    1"1/2"3 1/4"Round000000000000
    1 1/4"5/8"3 1/2"Round0000000000000
    1 1/2"3/4"3 7/8"Round0000000000000
    2"3/4"4 1/4"Round0000000000000
     

    Precise-Cutting Countersinks for Rivets

    The go-to countersinks for CNC machining and other high-volume, high-precision jobs. Ground in the U.S. to a tight tolerance of 0" to 0.001", they cut dozens or even hundreds of countersunk holes with the same depth, diameter, and clean finish every time.
    High-Speed Steel
    Image of Product. Front orientation. Countersinks. Precise-Cutting Countersinks for Rivets, 6 Flutes.

    6 Flutes

    These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.
    Dia.
    Uncoated
    Body
    Shank
    For Min.
    Hole Dia.
    Overall
    Lg.
    Shank
    Type
    Diameter
    Tolerance
    Each
    6 Flutes
     
    100° Countersink Angle
    1/4"1/4"0.046"2"Round0" to 0.001"00000000000000
    3/8"1/4"0.078"2"Round0" to 0.001"0000000000000
    1/2"3/8"0.109"2"Round0" to 0.001"0000000000000
    5/8"3/8"1/8"2 1/4"Round0" to 0.001"0000000000000
    3/4"1/2"0.156"2 1/4"Round0" to 0.001"0000000000000
    1"1/2"0.203"2 3/4"Round0" to 0.001"0000000000000
     
    Carbide
    Image of Product. Front orientation. Countersinks. Precise-Cutting Countersinks for Rivets, 6 Flutes.

    6 Flutes

    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.
    Dia.
    Uncoated
    Body
    Shank
    For Min.
    Hole Dia.
    Overall
    Lg.
    Shank
    Type
    Diameter
    Tolerance
    Each
    6 Flutes
     
    100° Countersink Angle
    1/4"1/4"0.046"2"Round0" to 0.001"00000000000000
    3/8"1/4"0.078"2 1/2"Round0" to 0.001"0000000000000
    1/2"3/8"0.109"2 1/2"Round0" to 0.001"0000000000000
    5/8"3/8"1/8"2 5/8"Round0" to 0.001"00000000000000
    3/4"1/2"0.156"2 3/4"Round0" to 0.001"00000000000000
    1"1/2"0.203"3"Round0" to 0.001"00000000000000
     

    Countersinks with Two Countersinking Ends for Rivets

    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 Rivets, 6 Flutes.

    6 Flutes

    These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.
    Dia.
    Uncoated
    Body
    Shank
    Overall
    Lg.
    Shank
    Type
    Each
    6 Flutes
     
    100° Countersink Angle
    1/8"1/8"1 1/2"Round00000000000000
    3/16"3/16"2"Round0000000000000
    1/4"1/4"2"Round0000000000000
    5/16"5/16"2 1/2"Round0000000000000
    3/8"3/8"2 1/2"Round0000000000000
    1/2"1/2"3"Round0000000000000
    5/8"5/8"3 1/2"Round0000000000000
    3/4"3/4"4"Round0000000000000
     
    Carbide
    Image of Product. Front orientation. Countersinks. Countersinks with Two Countersinking Ends for Rivets, 6 Flutes.

    6 Flutes

    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.
    Dia.
    Uncoated
    Body
    Shank
    Overall
    Lg.
    Shank
    Type
    Each
    6 Flutes
     
    100° Countersink Angle
    1/8"1/8"1 1/2"Round00000000000000
    3/16"3/16"2"Round0000000000000
    1/4"1/4"2"Round0000000000000
    5/16"5/16"2 1/2"Round0000000000000
    3/8"3/8"2 1/2"Round0000000000000
    1/2"1/2"3"Round00000000000000
    5/8"5/8"3 1/2"Round00000000000000
    3/4"3/4"4"Round00000000000000
     

    Fluteless Smooth-Finish Countersink Sets for Rivets

    Image of Product. Front orientation. Countersinks. Fluteless Smooth-Finish Countersink Sets for Rivets.
    With a hollow body and single cutting edge, these countersinks make less contact with the hole than solid-body countersinks. The reduced friction minimizes vibration and leaves a more accurate, tight-fitting recess for your screw head.
    High-Speed Steel—These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.
    For Hole Dia.
    100°
    Countersink Angle
    No. of
    Flutes
    No. of
    Pieces
    1/4" Shank
    1/2" Shank
    Finish
    Shank
    Type
    Container
    Type
    Each
    High-Speed Steel
    051/16", 5/32", 3/16"5/16", 9/16"UncoatedRoundWood Stand00000000000000
     

    Drill-Point Countersinks for Rivets

    Image of Product. Front orientation. Countersinks. Drill-Point Countersinks for Rivets.
    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 rivet heads.
    High-Speed Steel
    These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.
    Black Oxide—The dark finish increases wear resistance and reduces friction to improve chip flow, so these can last 50% longer than uncoated countersinks.
    Dia.
    Black Oxide
    Body
    Shank
    Drill Tip
    Dia.
    Overall
    Lg.
    Shank
    Type
    Each
    4 Flutes
     
    100° Countersink Angle
    1/8"1/8"0.041"1 1/2"Round00000000000000
    3/16"3/16"0.062"1 1/2"Round0000000000000
    1/4"1/4"0.082"2"Round0000000000000
    5/16"1/4"0.104"2"Round0000000000000
    3/8"1/4"0.125"2"Round0000000000000
    1/2"3/8"0.167"2"Round0000000000000
    5/8"3/8"0.208"2 1/4"Round0000000000000
    3/4"1/2"0.250"2 3/4"Round0000000000000
    7/8"1/2"0.291"2 3/4"Round0000000000000
    1"1/2"0.333"2 3/4"Round0000000000000
     

    Fluteless Smooth-Finish Countersinks with Two Countersinking Ends for Rivets

    Image of Product. Front orientation. Countersinks. Fluteless Smooth-Finish Countersinks with Two Countersinking Ends for Rivets.
    When one end starts to wear, flip the tool around for a fresh cutting edge. The hollow body minimizes vibration while lifting chips out of the hole for a smooth, accurate finish. Also known as zero-flute countersinks.
    High-Speed Steel
    These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.
    Dia.
    Uncoated
    For Hole Dia.
    Body
    Shank
    Overall
    Lg.
    Shank
    Type
    Each
    0 Flutes
     
    100° Countersink Angle
    1/16" to 15/64"1/4"1/4"1 7/8"Round0000000000000
     

    Two-Piece Long-Reach Countersinks for Rivets

    Create a custom-length countersink for access to hard-to-reach holes. These tools are used in angle drills and hand drivers for countersinking and deburring. For maximum stability, choose the shortest extension that works for your application.
    High-Speed Steel
    Image of Product. Front orientation. Countersinks. Two-Piece Long-Reach Countersinks for Rivets, 2 Flutes.
    Image of Product. Front orientation. Countersink Extensions.

    2 Flutes

    Countersink Extensions

    These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.
    Countersinks
    4" Overall Length
    Countersink Extensions
    6" Overall Length
    Countersink Extensions
    12" Overall Length
    Countersink Extensions
    Dia.
    Uncoated
    Body
    Shank
    Overall
    Lg.
    Shank
    Type
    Each
    Each
    Each
    Each
    2 Flutes
     
    100° Countersink Angle
    3/8"1/4"3/4"Threaded0000000000000000000000000000000000000000000000000000
    1/2"1/4"3/4"Threaded000000000000000000000000000000000000000000000000
     

    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.
    Black Oxide—The dark finish increases wear resistance and reduces friction to improve chip flow, so these can last 50% longer than uncoated countersinks.
    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 Case000000000000000
    31/4", 3/8", 1/2", 3/4", 1"5UncoatedRoundPlastic Case0000000000000
    61/4", 5/16", 3/8", 1/2", 5/8", 3/4", 1"7Black OxideRoundPlastic Case0000000000000
     
    Carbide
    11/4", 3/8", 1/2", 5/8", 3/4"5UncoatedRoundMetal Case00000000000000
    11/4", 3/8", 1/2", 5/8", 3/4"5Titanium Carbon Nitride (TiCN) CoatedRoundMetal Case00000000000000
    11/4", 3/8", 1/2", 5/8", 3/4"5Titanium Aluminum Nitride (TiAlN) CoatedRoundMetal Case00000000000000
    11/4", 3/8", 1/2", 5/8", 3/4"5Aluminum Titanium Nitride (AlTiN) CoatedRoundMetal Case00000000000000
    31/4", 3/8", 1/2", 5/8", 3/4"5UncoatedRoundMetal Case000000000000000
    31/4", 3/8", 1/2", 5/8", 3/4"5Titanium Carbon Nitride (TiCN) CoatedRoundMetal Case00000000000000
    31/4", 3/8", 1/2", 5/8", 3/4"5Titanium Aluminum Nitride (TiAlN) CoatedRoundMetal Case00000000000000
    31/4", 3/8", 1/2", 5/8", 3/4"5Aluminum Titanium Nitride (AlTiN) CoatedRoundMetal Case00000000000000
    61/4", 3/8", 1/2", 5/8", 3/4"5UncoatedRoundMetal Case00000000000000
    61/4", 3/8", 1/2", 5/8", 3/4"5Titanium Carbon Nitride (TiCN) CoatedRoundMetal Case00000000000000
    61/4", 3/8", 1/2", 5/8", 3/4"5Titanium Aluminum Nitride (TiAlN) CoatedRoundMetal Case00000000000000
    61/4", 3/8", 1/2", 5/8", 3/4"5Aluminum Titanium Nitride (AlTiN) CoatedRoundMetal Case00000000000000
     

    Reverse Countersinks for Rivets

    If an obstruction blocks access for standard countersinks, these tools enter from the reverse side instead. They're often used to add countersunk holes to surfaces in preassembled parts. Put the shank (sold separately) in your drill chuck and insert it all the way through the hole. Then reach into the confined space to stick the countersink head onto the shank. Pull back on the drill to countersink the hole.
    High-Speed Steel
    Image of ProductInUse. Front orientation. Countersinks. Reverse Countersinks for Rivets, 3 Flutes.
    Image of ProductInUse. Front orientation. Contains Annotated, Border. Countersinks. Reverse Countersinks for Rivets, 3 Flutes.

    3 Flutes

    3 Flutes

    These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.
    Countersinks
    Required Shanks
    Uncoated
    Body
    Dia.
    For Hole
    Dia.
    Overall
    Lg.
    Each
    Shank
    Dia.
    Overall
    Lg.
    Each
    3 Flutes
     
    100° Countersink Angle
    5/16"3/32"1/2"00000000000003/32"6"000000000000
    5/16"1/8"1/2"0000000000001/8"6"00000000000
    5/16"5/32"1/2"0000000000005/32"6"00000000000
    3/8"1/8"1/2"0000000000001/8"6"00000000000
    3/8"5/32"1/2"0000000000005/32"6"00000000000
    3/8"3/16"1/2"0000000000003/16"6"000000000000
    1/2"5/32"1/2"0000000000005/32"6"00000000000
    1/2"3/16"1/2"0000000000003/16"6"000000000000
    1/2"1/4"1/2"0000000000001/4"6"000000000000
     

    Drill-Point Countersinks with Two Countersinking Ends for Rivets

    When one end starts to wear, flip the tool around for a fresh cutting edge. These countersinks have a small drill point to drill new pilot holes topped with cone-shaped recesses for rivet heads.
    Carbide
    Image of Product. Front orientation. Countersinks. Drill-Point Countersinks with Two Countersinking Ends for Rivets, 4 Flutes.

    4 Flutes

    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.
    Dia.
    Uncoated
    Body
    Shank
    Drill Tip
    Dia.
    Overall
    Lg.
    Shank
    Type
    Each
    4 Flutes
     
    100° Countersink Angle
    1/8"1/8"0.041"1 1/2"Round00000000000000
    3/16"3/16"0.062"2"Round0000000000000
    1/4"1/4"0.082"2"Round0000000000000
    5/16"5/16"0.104"2 1/2"Round0000000000000
    3/8"3/8"0.125"2 1/2"Round0000000000000
    1/2"1/2"0.167"3"Round00000000000000
     

    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"0000000000000000000000000000
    1/2"1/2" to 1 3/4"1/2"2 3/8"RoundSquareSPGH-4331/2"3/16"00000000000000000000000000
    3/4"1 1/4" to 2 1/2"1 1/4"2 3/8"RoundSquareSPGH-4331/2"3/16"00000000000000000000000000
     
    Replacement Carbide Inserts
    Image of ProductInUse. Individual Carbide Insert Case. Front orientation. Countersink Inserts.

    Individual Carbide

    Insert Case

    Inserts sold individually come packed in a clear plastic case to protect cutting edges during shipment. Inserts sold in packs come factory sealed from the manufacturer for maximum traceability.
    Titanium Nitride (TiN)-Coated Carbide—Withstand heat, corrosion, and abrasion better than uncoated inserts, so they stay sharp over longer periods.
    Each
    Package
    Material
    Insert
    Shape
    Each
    Pkg.
    Qty.
    Pkg.
    Uncoated CarbideTriangle000000000000010000000000000000
    Uncoated CarbideSquare000000000000010000000000000000
    Titanium Nitride (TiN)-Coated CarbideTriangle00000000000001000000000000000
    Titanium Nitride (TiN)-Coated CarbideSquare000000000000010000000000000000

    Smooth-Finish Countersink Sets for Rivets

    Image of Product. Front orientation. Countersinks. Smooth-Finish Countersink Sets for Rivets.
    Make smooth, uniform cuts without stopping to clear chips. Spiral-flute cutting edges lift chips out of the hole as you cut so they don't clog the tool.
    High-Speed Steel—These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.
    100°
    Countersink Angle
    No. of
    Flutes
    Body Dia. Included
    No. of
    Pieces
    Finish
    Shank
    Type
    Container
    Type
    Each
    High-Speed Steel
    31/4", 3/8", 1/2", 5/8", 3/4"5UncoatedRoundPlastic Case000000000000000
     
    back to top