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    53 Products
    About Countersinks
    industrial info icon

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

    For Cutting

    For Cutting

    Material

    Fluteless Smooth-Finish Countersinks for Screws

    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
    Image of Product. Front orientation. Countersinks. Fluteless Smooth-Finish Countersinks for Screws, 0 Flutes.

    0 Flutes

    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.
    Dia.
    Uncoated
    For Hole Dia.
    Body
    Shank
    Overall
    Lg.
    Shank
    Type
    Mfr.
    Each
    0 Flutes
     
    82° Countersink Angle
    5/32" to 13/32"7/16"1/4"1 21/32"RoundRepublic Drill2739A32000000
    3/16" to 17/32"9/16"1/4"1 7/8"RoundRepublic Drill2739A3300000
    5/16" to 25/32"13/16"1/4"2 1/8"RoundRepublic Drill2739A4400000
    5/16" to 25/32"13/16"1/2"2 5/8"RoundRepublic Drill2739A3400000
    7/16" to 7/8"15/16"1/2"2 19/32"RoundRepublic Drill2739A4500000
    9/16" to 1 1/16"1 1/8"1/2"2 29/32"RoundRepublic Drill2739A3500000
    5/8" to 1 15/32"1 1/2"1/2"2 7/8"RoundRepublic Drill2739A46000000
    3/4" to 1 3/4"1 3/4"5/8"3 1/8"RoundRepublic Drill2739A47000000
    1" to 2"2 1/8"5/8"3 1/2"RoundRepublic Drill2739A48000000
    1 1/4" to 2 1/2"2 5/8"3/4"3 7/8"RoundRepublic Drill2739A49000000
     
    90° Countersink Angle
    5/32" to 13/32"7/16"1/4"1 21/32"RoundRepublic Drill2739A3700000
    3/16" to 17/32"9/16"1/4"1 7/8"RoundRepublic Drill2739A3800000
    5/16" to 25/32"13/16"1/4"2 1/8"RoundRepublic Drill2739A8100000
    5/16" to 25/32"13/16"1/2"2 5/8"RoundRepublic Drill2739A3900000
    9/16" to 1 1/16"1 1/8"1/2"2 29/32"RoundRepublic Drill2739A4100000
     
    Cobalt Steel
    Image of Product. Front orientation. Countersinks. Fluteless Smooth-Finish Countersinks for Screws, 0 Flutes.

    0 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.
    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
    For Hole Dia.
    Body
    Shank
    Overall
    Lg.
    Shank
    Type
    Mfr.
    Each
    0 Flutes
     
    82° Countersink Angle
    13/64" to 27/64"7/16"1/4"2 1/32"RoundMelin Tool2724A122000000
    5/16" to 17/32"9/16"1/4"2"RoundMelin Tool2724A13200000
    1/2" to 25/32"13/16"1/2"2 5/8"RoundMelin Tool2724A14200000
    3/4" to 1 3/32"1 1/8"1/2"2 7/8"RoundMelin Tool2724A15200000
     
    90° Countersink Angle
    13/64" to 27/64"7/16"1/4"2 1/32"RoundMelin Tool2724A12300000
    5/16" to 17/32"9/16"1/4"2"RoundMelin Tool2724A13300000
    1/2" to 25/32"13/16"1/2"2 5/8"RoundMelin Tool2724A14300000
    3/4" to 1 3/32"1 1/8"1/2"2 7/8"RoundMelin Tool2724A15300000
     

    Fluteless Smooth-Finish Countersinks with Pilot for Screws

    Cut a smooth, accurate seat for your screw head on the first pass. The built-in pilot centers the countersink while the hollow body prevents chip buildup, vibration, and wobbling.
    High-Speed Steel
    Image of Product. Front orientation. Countersinks. Fluteless Smooth-Finish Countersinks with Pilot for Screws, 0 Flutes.

    0 Flutes

    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.
    Dia.
    Pilot
    Uncoated
    For Hole Dia.
    Body
    Shank
    Dia.
    Lg.
    For Screw
    Size
    Overall
    Lg.
    Shank
    Type
    Mfr.
    Each
    0 Flutes
     
    82° Countersink Angle
    1/4" to 33/64"33/64"3/8"1/4"5/32"1/4"
    		2"RoundRepublic Drill2739A64000000
    5/16" to 41/64"41/64"3/8"5/16"5/32"5/16"
    		2 3/16"RoundRepublic Drill2739A6600000
    3/8" to 49/64"49/64"1/2"3/8"5/32"3/8"
    		2 1/2"RoundRepublic Drill2739A6800000
    7/16" to 53/64"53/64"1/2"7/16"7/32"7/16"
    		2 11/16"RoundRepublic Drill2739A7100000
    1/2" to 15/16"15/16"1/2"1/2"1/4"1/2"
    		2 11/16"RoundRepublic Drill2739A7300000
     

    Fluteless Smooth-Finish Countersink Sets with Pilot for Screws

    Image of Product. Front orientation. Countersinks. Fluteless Smooth-Finish Countersink Sets with Pilot for Screws.
    Cut a smooth, accurate seat for your screw head on the first pass. The built-in pilot centers the countersink while the hollow body prevents chip buildup, vibration, and wobbling.
    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 Hole Dia.
    Finish
    Shank
    Type
    Container
    Type
    Mfr.
    Each
    High-Speed Steel
    051/4" to 15/16"UncoatedRoundWood StandRepublic Drill2739A290000000
     

    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.
    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
    For Hole Dia.
    Body
    Shank
    Overall
    Lg.
    Shank
    Type
    Mfr.
    Each
    0 Flutes
     
    100° Countersink Angle
    5/32" to 13/32"7/16"1/4"1 21/32"RoundRepublic Drill2739A59000000
    3/16" to 17/32"9/16"1/4"1 7/8"RoundRepublic Drill2739A6100000
    5/16" to 25/32"13/16"1/2"2 5/8"RoundRepublic Drill2739A6200000
    9/16" to 1 1/16"1 1/8"1/2"2 29/32"RoundRepublic Drill2739A6300000
     

    Fluteless Smooth-Finish Countersink Sets for Screws

    Image of Product. Front orientation. Countersinks. Fluteless Smooth-Finish Countersink Sets for Screws.
    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.
    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.
    For Hole Dia.
    82°
    Countersink Angle
    90°
    Countersink Angle
    No. of
    Flutes
    No. of
    Pieces
    1/4" Shank
    1/2" Shank
    Finish
    Shank
    Type
    Container
    Type
    Mfr.
    Each
    Each
    High-Speed Steel
    051/16", 5/32", 3/16"5/16", 9/16"UncoatedRoundWood StandRepublic Drill2739A4200000002739A430000000
     

    Fluteless Smooth-Finish Countersinks with Two Countersinking Ends for Screws

    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
    Image of Product. Front orientation. Countersinks. Fluteless Smooth-Finish Countersinks with Two Countersinking Ends for Screws, 0 Flutes.

    0 Flutes

    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.
    Dia.
    Uncoated
    For Hole Dia.
    Body
    Shank
    Overall
    Lg.
    Shank
    Type
    Mfr.
    Each
    0 Flutes
     
    82° Countersink Angle
    1/16" to 15/64"1/4"1/4"1 7/8"RoundRepublic Drill2739A31000000
     
    90° Countersink Angle
    1/16" to 15/64"1/4"1/4"1 7/8"RoundRepublic Drill2739A3600000
     
    Cobalt Steel
    Image of Product. Front orientation. Countersinks. Fluteless Smooth-Finish Countersinks with Two Countersinking Ends for Screws, 0 Flutes.

    0 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.
    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
    For Hole Dia.
    Body
    Shank
    Overall
    Lg.
    Shank
    Type
    Mfr.
    Each
    0 Flutes
     
    82° Countersink Angle
    3/32" to 15/64"1/4"1/4"1 1/2"RoundMelin Tool2724A112000000
     
    90° Countersink Angle
    3/32" to 15/64"1/4"1/4"1 1/2"RoundMelin Tool2724A11300000
     

    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.
    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
    For Hole Dia.
    Body
    Shank
    Overall
    Lg.
    Shank
    Type
    Mfr.
    Each
    0 Flutes
     
    100° Countersink Angle
    1/16" to 15/64"1/4"1/4"1 7/8"RoundRepublic Drill2739A58000000
     

    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.
    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.
    For Hole Dia.
    100°
    Countersink Angle
    No. of
    Flutes
    No. of
    Pieces
    1/4" Shank
    1/2" Shank
    Finish
    Shank
    Type
    Container
    Type
    Mfr.
    Each
    High-Speed Steel
    051/16", 5/32", 3/16"5/16", 9/16"UncoatedRoundWood StandRepublic Drill2739A280000000
     

    Fluteless Smooth-Finish Countersinks for Lathe Centers

    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
    Image of Product. Front orientation. Countersinks. Fluteless Smooth-Finish Countersinks for Lathe Centers, 0 Flutes.

    0 Flutes

    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.
    Dia.
    Uncoated
    For Hole Dia.
    Body
    Shank
    Overall
    Lg.
    Shank
    Type
    Mfr.
    Each
    0 Flutes
     
    60° Countersink Angle
    3/16" to 13/32"7/16"1/4"1 25/32"RoundRepublic Drill2739A53000000
    5/16" to 17/32"9/16"1/4"1 15/16"RoundRepublic Drill2739A5400000
    7/16" to 25/32"13/16"1/4"2 3/8"RoundRepublic Drill2739A5500000
    7/16" to 25/32"13/16"1/2"2 3/4"RoundRepublic Drill2739A5600000
    11/16" to 1 3/32"1 1/8"1/2"2 11/64"RoundRepublic Drill2739A5700000
     
    Cobalt Steel
    Image of Product. Front orientation. Countersinks. Fluteless Smooth-Finish Countersinks for Lathe Centers, 0 Flutes.

    0 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.
    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
    For Hole Dia.
    Body
    Shank
    Overall
    Lg.
    Shank
    Type
    Mfr.
    Each
    0 Flutes
     
    60° Countersink Angle
    13/64" to 27/64"7/16"1/4"2 1/32"RoundMelin Tool2724A121000000
    5/16" to 17/32"9/16"1/4"2"RoundMelin Tool2724A13100000
    1/2" to 25/32"13/16"1/2"2 5/8"RoundMelin Tool2724A14100000
    3/4" to 1 3/32"1 1/8"1/2"2 7/8"RoundMelin Tool2724A15100000
     

    Fluteless Smooth-Finish Countersink Sets for Lathe Centers

    Image of Product. Front orientation. Countersinks. Fluteless Smooth-Finish Countersink Sets for Lathe Centers.
    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.
    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.
    For Hole Dia.
    60°
    Countersink Angle
    No. of
    Flutes
    No. of
    Pieces
    1/4" Shank
    1/2" Shank
    Finish
    Shank
    Type
    Container
    Type
    Mfr.
    Each
    High-Speed Steel
    051/8", 3/16", 5/16"7/16", 11/16"UncoatedRoundWood StandRepublic Drill2739A270000000
     

    Fluteless Smooth-Finish Countersinks with Two Countersinking Ends for Lathe Centers

    Image of Product. Front orientation. Countersinks. Fluteless Smooth-Finish Countersinks with Two Countersinking Ends for Lathe Centers.
    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.
    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
    For Hole Dia.
    Body
    Shank
    Overall
    Lg.
    Shank
    Type
    Mfr.
    Each
    0 Flutes
     
    60° Countersink Angle
    1/8" to 15/64"1/4"1/4"1 7/8"RoundRepublic Drill2739A52000000
     
    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.
    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
    For Hole Dia.
    Body
    Shank
    Overall
    Lg.
    Shank
    Type
    Mfr.
    Each
    0 Flutes
     
    60° Countersink Angle
    3/32" to 15/64"1/4"1/4"1 1/2"RoundMelin Tool2724A111000000
     
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