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AT HSS Countersinks

Alfa Tools manufactures high-speed steel (HSS) countersinks, precision cutting tools designed to create conical recesses for flush-mount fasteners and chamfer hole edges across metal, aluminum, steel, stainless steel, and composite materials. Featuring precision-ground HSS construction with multiple flute configurations (single, 3, 4, 5, and 6 flutes) and three standard angles (60°, 82°, and 90°), these countersinks deliver clean, accurate countersunk holes for flathead screws, rivets, and professional edge finishing. Ideal for machinists, aerospace technicians, tool and die makers, fabricators, and manufacturing professionals requiring consistent, repeatable countersinking operations.

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

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

SKU: AT-C3F50533
MPN: C3F50533

Save $7.40
Alfa Tools C3F50533A 1/4 X 3/16 HSS 60° 3 FLUTE COUNTERSINK

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

SKU: AT-C3F50533A
MPN: C3F50533A

Save $7.40
Alfa Tools C3F50533B 1/4 X 3/16 HSS 90° 3 FLUTE COUNTERSINK

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

SKU: AT-C3F50533B
MPN: C3F50533B

Save $7.40
Alfa Tools C3F50534 3/8 X 1/4 HSS 82° 3 FLUTE COUNTERSINK

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

SKU: AT-C3F50534
MPN: C3F50534

Save $10.25
Alfa Tools C3F50534A 3/8 X 1/4 HSS 60° 3 FLUTE COUNTERSINK

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

SKU: AT-C3F50534A
MPN: C3F50534A

Save $10.25
Alfa Tools C3F50534B 3/8 X 1/4 HSS 90° 3 FLUTE COUNTERSINK

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

SKU: AT-C3F50534B
MPN: C3F50534B

Save $10.25
Alfa Tools C3F50535 1/2 X 3/8 HSS 82° 3 FLUTE COUNTERSINK

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

SKU: AT-C3F50535
MPN: C3F50535

Save $12.76
Alfa Tools C3F50535A 1/2 X 3/8 HSS 60° 3 FLUTE COUNTERSINK

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

SKU: AT-C3F50535A
MPN: C3F50535A

Save $12.76
Alfa Tools C3F50535B 1/2 X 3/8 HSS 90° 3 FLUTE COUNTERSINK

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

SKU: AT-C3F50535B
MPN: C3F50535B

Save $12.76
Alfa Tools C3F50536 5/8 X 3/8 HSS 82° 3 FLUTE COUNTERSINK

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

SKU: AT-C3F50536
MPN: C3F50536

Save $19.56
Alfa Tools C3F50536A 5/8 X 3/8 HSS 60° 3 FLUTE COUNTERSINK

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

SKU: AT-C3F50536A
MPN: C3F50536A

Save $19.56
Alfa Tools C3F50536B 5/8 X 3/8 HSS 90° 3 FLUTE COUNTERSINK

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

SKU: AT-C3F50536B
MPN: C3F50536B

Save $19.56
Alfa Tools C3F50537 3/4 X 1/2 HSS 82° 3 FLUTE COUNTERSINK

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

SKU: AT-C3F50537
MPN: C3F50537

Save $21.91
Alfa Tools C3F50537A 3/4 X 1/2 HSS 60° 3 FLUTE COUNTERSINK

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

SKU: AT-C3F50537A
MPN: C3F50537A

Save $21.91
Alfa Tools C3F50537B 3/4 X 1/2 HSS 90° 3 FLUTE COUNTERSINK

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

SKU: AT-C3F50537B
MPN: C3F50537B

Save $21.91
Alfa Tools C3F50538 1 X 1/2 HSS 82° 3 FLUTE COUNTERSINK

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

SKU: AT-C3F50538
MPN: C3F50538

Save $38.75
Alfa Tools C3F50538A 1 X 1/2 HSS 60° 3 FLUTE COUNTERSINK

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

SKU: AT-C3F50538A
MPN: C3F50538A

Save $38.75
Alfa Tools C3F50538B 1 X 1/2 HSS 90° 3 FLUTE COUNTERSINK

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

SKU: AT-C3F50538B
MPN: C3F50538B

Save $38.75
Alfa Tools C3F50539 1-1/4 X 3/4 HSS 82° 3FL.COUNTERSINK

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

SKU: AT-C3F50539
MPN: C3F50539

Save $71.01
Alfa Tools C3F50539A 1-1/4 X 3/4 HSS 60° 3 FLUTE COUNTERSINK

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

SKU: AT-C3F50539A
MPN: C3F50539A

Save $71.01
Alfa Tools C3F50539B 1-1/4 X 3/4 HSS 90° 3 FLUTE COUNTERSINK

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

SKU: AT-C3F50539B
MPN: C3F50539B

Save $71.01
Alfa Tools C3F50540 1-1/2 X 3/4 HSS 82° 3 FLUTE COUNTERSINK

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

SKU: AT-C3F50540
MPN: C3F50540

Save $98.67
Alfa Tools C3F50540A 1-1/2 X 3/4 HSS 60° 3 FLUTE COUNTERSINK

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

SKU: AT-C3F50540A
MPN: C3F50540A

Save $98.67
Alfa Tools C3F50540B 1-1/2 X 3/4 HSS 90° 3 FLUTE COUNTERSINK

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

SKU: AT-C3F50540B
MPN: C3F50540B

Save $98.67