AT HSS Countersinks

AT HSS countersinks are cutting tools used to create a countersink (conical seat) or chamfer on drilled holes, and they’re also commonly used for deburring sharp edges after drilling (application dependent; verify per listing). In machining and fabrication, countersinks help prepare holes for flat-head fasteners and improve part finish by removing burrs that can interfere with assembly or inspection. High-speed steel (HSS) countersinks are a popular choice for general-purpose shop use, especially when you need a balance of toughness and cutting performance across a range of materials (application dependent).

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Alfa Tools C3F50533 1/4 X 3/16 HSS 82° 3 FLUTE COUNTERSINK

SKU: AT-C3F50533
MPN: C3F50533

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Alfa Tools C3F50533A 1/4 X 3/16 HSS 60° 3 FLUTE COUNTERSINK

SKU: AT-C3F50533A
MPN: C3F50533A

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Alfa Tools C3F50533B 1/4 X 3/16 HSS 90° 3 FLUTE COUNTERSINK

SKU: AT-C3F50533B
MPN: C3F50533B

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Alfa Tools C3F50534 3/8 X 1/4 HSS 82° 3 FLUTE COUNTERSINK

SKU: AT-C3F50534
MPN: C3F50534

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Alfa Tools C3F50534A 3/8 X 1/4 HSS 60° 3 FLUTE COUNTERSINK

SKU: AT-C3F50534A
MPN: C3F50534A

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Alfa Tools C3F50534B 3/8 X 1/4 HSS 90° 3 FLUTE COUNTERSINK

SKU: AT-C3F50534B
MPN: C3F50534B

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Alfa Tools C3F50535 1/2 X 3/8 HSS 82° 3 FLUTE COUNTERSINK

SKU: AT-C3F50535
MPN: C3F50535

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Alfa Tools C3F50535A 1/2 X 3/8 HSS 60° 3 FLUTE COUNTERSINK

SKU: AT-C3F50535A
MPN: C3F50535A

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Alfa Tools C3F50535B 1/2 X 3/8 HSS 90° 3 FLUTE COUNTERSINK

SKU: AT-C3F50535B
MPN: C3F50535B

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Alfa Tools C3F50536 5/8 X 3/8 HSS 82° 3 FLUTE COUNTERSINK

SKU: AT-C3F50536
MPN: C3F50536

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Alfa Tools C3F50536A 5/8 X 3/8 HSS 60° 3 FLUTE COUNTERSINK

SKU: AT-C3F50536A
MPN: C3F50536A

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Alfa Tools C3F50536B 5/8 X 3/8 HSS 90° 3 FLUTE COUNTERSINK

SKU: AT-C3F50536B
MPN: C3F50536B

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Alfa Tools C3F50537 3/4 X 1/2 HSS 82° 3 FLUTE COUNTERSINK

SKU: AT-C3F50537
MPN: C3F50537

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Alfa Tools C3F50537A 3/4 X 1/2 HSS 60° 3 FLUTE COUNTERSINK

SKU: AT-C3F50537A
MPN: C3F50537A

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Alfa Tools C3F50537B 3/4 X 1/2 HSS 90° 3 FLUTE COUNTERSINK

SKU: AT-C3F50537B
MPN: C3F50537B

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Alfa Tools C3F50538 1 X 1/2 HSS 82° 3 FLUTE COUNTERSINK

SKU: AT-C3F50538
MPN: C3F50538

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Alfa Tools C3F50538A 1 X 1/2 HSS 60° 3 FLUTE COUNTERSINK

SKU: AT-C3F50538A
MPN: C3F50538A

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Alfa Tools C3F50538B 1 X 1/2 HSS 90° 3 FLUTE COUNTERSINK

SKU: AT-C3F50538B
MPN: C3F50538B

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Alfa Tools C3F50539 1-1/4 X 3/4 HSS 82° 3FL.COUNTERSINK

SKU: AT-C3F50539
MPN: C3F50539

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Alfa Tools C3F50539A 1-1/4 X 3/4 HSS 60° 3 FLUTE COUNTERSINK

SKU: AT-C3F50539A
MPN: C3F50539A

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Alfa Tools C3F50539B 1-1/4 X 3/4 HSS 90° 3 FLUTE COUNTERSINK

SKU: AT-C3F50539B
MPN: C3F50539B

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Alfa Tools C3F50540 1-1/2 X 3/4 HSS 82° 3 FLUTE COUNTERSINK

SKU: AT-C3F50540
MPN: C3F50540

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Alfa Tools C3F50540A 1-1/2 X 3/4 HSS 60° 3 FLUTE COUNTERSINK

SKU: AT-C3F50540A
MPN: C3F50540A

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Alfa Tools C3F50540B 1-1/2 X 3/4 HSS 90° 3 FLUTE COUNTERSINK

SKU: AT-C3F50540B
MPN: C3F50540B

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