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    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.
    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.
    Countersinks
    Replacement
    Screws
    Insert
    Uncoated
    Shank
    Dia.
    For Hole Dia.
    For Min.
    Hole Dia.
    Overall
    Lg.
    Shank
    Type
    Shape
    Code
    Size
    Thk.
    Mfr.
    Each
    Each
    1 Flute
     
    82° Countersink Angle
    1/2"1/4" to 3/4"1/4"2 3/8"RoundTriangleTPGH-3213/8"1/8"Republic Drill29245A61000000029245A9600000
    1/2"1/2" to 1 3/4"1/2"2 3/8"RoundSquareSPGH-4331/2"3/16"Republic Drill29245A6200000029245A960000
    3/4"1 1/4" to 2 1/2"1 1/4"2 3/8"RoundSquareSPGH-4331/2"3/16"Republic Drill29245A6300000029245A960000
     
    90° Countersink Angle
    1/2"1/4" to 3/4"1/4"2 3/8"RoundTriangleTPGH-3213/8"1/8"Republic Drill29245A6400000029245A960000
    1/2"1/2" to 1 3/4"1/2"2 3/8"RoundSquareSPGH-4331/2"3/16"Republic Drill29245A6500000029245A960000
    3/4"1 1/4" to 2 1/2"1 1/4"2 3/8"RoundSquareSPGH-4331/2"3/16"Republic Drill29245A6600000029245A960000
     
    Replacement Carbide Inserts
    Image of Product. 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 CarbideTriangle29245A67000001029245A188000000
    Uncoated CarbideSquare29245A68000001029245A291000000
    Titanium Nitride (TiN)-Coated CarbideTriangle29245A71000001029245A306000000
    Titanium Nitride (TiN)-Coated CarbideSquare29245A72000001029245A918000000

    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.
    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.
    Countersinks
    Replacement
    Screws
    Insert
    Uncoated
    Shank
    Dia.
    For Hole Dia.
    For Min.
    Hole Dia.
    Overall
    Lg.
    Shank
    Type
    Shape
    Code
    Size
    Thk.
    Mfr.
    Each
    Each
    1 Flute
     
    60° Countersink Angle
    1/2"1/4" to 3/4"1/4"2 3/8"RoundTriangleTPGH-3213/8"1/8"Republic Drill29245A57000000029245A9600000
    1/2"1/2" to 1 3/4"1/2"2 3/4"RoundSquareSPGH-4331/2"3/16"Republic Drill29245A5800000029245A960000
    3/4"1 1/4" to 2 1/2"1 1/4"2 3/4"RoundSquareSPGH-4331/2"3/16"Republic Drill29245A5900000029245A960000
     
    Replacement Carbide Inserts
    Image of Product. 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 CarbideTriangle29245A67000001029245A188000000
    Uncoated CarbideSquare29245A68000001029245A291000000
    Titanium Nitride (TiN)-Coated CarbideTriangle29245A71000001029245A306000000
    Titanium Nitride (TiN)-Coated CarbideSquare29245A72000001029245A918000000

    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.
    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.
    Countersinks
    Replacement
    Screws
    Insert
    Uncoated
    Shank
    Dia.
    For Hole Dia.
    For Min.
    Hole Dia.
    Overall
    Lg.
    Shank
    Type
    Shape
    Code
    Size
    Thk.
    Mfr.
    Each
    Each
    1 Flute
     
    100° Countersink Angle
    1/2"1/4" to 3/4"1/4"2 3/8"RoundTriangleTPGH-3213/8"1/8"Republic Drill29245A81000000029245A9600000
    1/2"1/2" to 1 3/4"1/2"2 3/8"RoundSquareSPGH-4331/2"3/16"Republic Drill29245A8200000029245A960000
    3/4"1 1/4" to 2 1/2"1 1/4"2 3/8"RoundSquareSPGH-4331/2"3/16"Republic Drill29245A8300000029245A960000
     
    Replacement Carbide Inserts
    Image of Product. 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 CarbideTriangle29245A67000001029245A188000000
    Uncoated CarbideSquare29245A68000001029245A291000000
    Titanium Nitride (TiN)-Coated CarbideTriangle29245A71000001029245A306000000
    Titanium Nitride (TiN)-Coated CarbideSquare29245A72000001029245A918000000
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