McMaster-Carr logo
    Filter by
    Countersink Angle
    Industrial Info Compare
    Attribute Image
    Insert Shape
    Shank Diameter
    Insert Code
    Insert Size
    DFARS Specialty Metals
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Overall Length
    Insert Thickness
    Insert Designation
    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)
    21 Products
    About Countersinks
    industrial info icon

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

    For Cutting

    For Cutting

    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

    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
    back to top