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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 C6F50547 1/4 X 1/4 HSS 82° 6 FLUTE COUNTERSINK

Alfa Tools C6F50547 1/4 X 1/4 HSS 82° 6 FLUTE COUNTERSINK

SKU: AT-C6F50547
MPN: C6F50547

Save $8.55
Alfa Tools C6F50547A 1/4 X 1/4 HSS 60° 6 FLUTE COUNTERSINK

Alfa Tools C6F50547A 1/4 X 1/4 HSS 60° 6 FLUTE COUNTERSINK

SKU: AT-C6F50547A
MPN: C6F50547A

Save $8.55
Alfa Tools C6F50547B 1/4 X 1/4 HSS 90° 6 FLUTE COUNTERSINK

Alfa Tools C6F50547B 1/4 X 1/4 HSS 90° 6 FLUTE COUNTERSINK

SKU: AT-C6F50547B
MPN: C6F50547B

Save $8.55
Alfa Tools C6F50548 5/16 X 1/4 HSS 82° 6 FLUTE COUNTERSINK

Alfa Tools C6F50548 5/16 X 1/4 HSS 82° 6 FLUTE COUNTERSINK

SKU: AT-C6F50548
MPN: C6F50548

Save $9.98
Alfa Tools C6F50548A 5/16 X 1/4 HSS 60° 6 FLUTE COUNTERSINK

Alfa Tools C6F50548A 5/16 X 1/4 HSS 60° 6 FLUTE COUNTERSINK

SKU: AT-C6F50548A
MPN: C6F50548A

Save $9.98
Alfa Tools C6F50548B 5/16 X 1/4 HSS 90° 6 FLUTE COUNTERSINK

Alfa Tools C6F50548B 5/16 X 1/4 HSS 90° 6 FLUTE COUNTERSINK

SKU: AT-C6F50548B
MPN: C6F50548B

Save $9.98
Alfa Tools C6F50549 3/8 X 1/4 HSS 82° 6 FLUTE COUNTERSINK

Alfa Tools C6F50549 3/8 X 1/4 HSS 82° 6 FLUTE COUNTERSINK

SKU: AT-C6F50549
MPN: C6F50549

Save $11.90
Alfa Tools C6F50549A 3/8 X 1/4 HSS 60° 6 FLUTE COUNTERSINK

Alfa Tools C6F50549A 3/8 X 1/4 HSS 60° 6 FLUTE COUNTERSINK

SKU: AT-C6F50549A
MPN: C6F50549A

Save $11.90
Alfa Tools C6F50549B 3/8 X 1/4 HSS 90° 6 FLUTE COUNTERSINK

Alfa Tools C6F50549B 3/8 X 1/4 HSS 90° 6 FLUTE COUNTERSINK

SKU: AT-C6F50549B
MPN: C6F50549B

Save $11.90
Alfa Tools C6F50550 1/2 X 1/4 HSS 82° 6 FLUTE COUNTERSINK

Alfa Tools C6F50550 1/2 X 1/4 HSS 82° 6 FLUTE COUNTERSINK

SKU: AT-C6F50550
MPN: C6F50550

Save $15.51
Alfa Tools C6F50550A 1/2 X 1/4 HSS 60° 6 FLUTE COUNTERSINK

Alfa Tools C6F50550A 1/2 X 1/4 HSS 60° 6 FLUTE COUNTERSINK

SKU: AT-C6F50550A
MPN: C6F50550A

Save $15.51
Alfa Tools C6F50550B 1/2 X 1/4 HSS 90° 6 FLUTE COUNTERSINK

Alfa Tools C6F50550B 1/2 X 1/4 HSS 90° 6 FLUTE COUNTERSINK

SKU: AT-C6F50550B
MPN: C6F50550B

Save $15.51
Alfa Tools C6F50551 5/8 X 1/2 HSS 82° 6 FLUTE COUNTERSINK

Alfa Tools C6F50551 5/8 X 1/2 HSS 82° 6 FLUTE COUNTERSINK

SKU: AT-C6F50551
MPN: C6F50551

Save $22.91
Alfa Tools C6F50551A 5/8 X 1/2 HSS 60° 6 FLUTE COUNTERSINK

Alfa Tools C6F50551A 5/8 X 1/2 HSS 60° 6 FLUTE COUNTERSINK

SKU: AT-C6F50551A
MPN: C6F50551A

Save $22.91
Alfa Tools C6F50551B 5/8 X 1/2 HSS 90° 6 FLUTE COUNTERSINK

Alfa Tools C6F50551B 5/8 X 1/2 HSS 90° 6 FLUTE COUNTERSINK

SKU: AT-C6F50551B
MPN: C6F50551B

Save $22.91
Alfa Tools C6F50552 3/4 X 1/2 HSS 82° 6 FLUTE COUNTERSINK

Alfa Tools C6F50552 3/4 X 1/2 HSS 82° 6 FLUTE COUNTERSINK

SKU: AT-C6F50552
MPN: C6F50552

Save $30.36
Alfa Tools C6F50552A 3/4 X 1/2 HSS 60° 6 FLUTE COUNTERSINK

Alfa Tools C6F50552A 3/4 X 1/2 HSS 60° 6 FLUTE COUNTERSINK

SKU: AT-C6F50552A
MPN: C6F50552A

Save $30.36
Alfa Tools C6F50552B 3/4 X 1/2 HSS 90° 6 FLUTE COUNTERSINK

Alfa Tools C6F50552B 3/4 X 1/2 HSS 90° 6 FLUTE COUNTERSINK

SKU: AT-C6F50552B
MPN: C6F50552B

Save $30.36
Alfa Tools C6F50553 7/8 X 1/2 HSS 82° 6 FLUTE COUNTERSINK

Alfa Tools C6F50553 7/8 X 1/2 HSS 82° 6 FLUTE COUNTERSINK

SKU: AT-C6F50553
MPN: C6F50553

Save $40.03
Alfa Tools C6F50553A 7/8 X 1/2 HSS 60° 6 FLUTE COUNTERSINK

Alfa Tools C6F50553A 7/8 X 1/2 HSS 60° 6 FLUTE COUNTERSINK

SKU: AT-C6F50553A
MPN: C6F50553A

Save $40.03
Alfa Tools C6F50553B 7/8 X 1/2 HSS 90° 6 FLUTE COUNTERSINK

Alfa Tools C6F50553B 7/8 X 1/2 HSS 90° 6 FLUTE COUNTERSINK

SKU: AT-C6F50553B
MPN: C6F50553B

Save $40.03
Alfa Tools C6F50554 1 X 1/2 HSS 82° 6 FLUTE COUNTERSINK

Alfa Tools C6F50554 1 X 1/2 HSS 82° 6 FLUTE COUNTERSINK

SKU: AT-C6F50554
MPN: C6F50554

Save $48.39
Alfa Tools C6F50554A 1 X 1/2 HSS 60° 6 FLUTE COUNTERSINK

Alfa Tools C6F50554A 1 X 1/2 HSS 60° 6 FLUTE COUNTERSINK

SKU: AT-C6F50554A
MPN: C6F50554A

Save $48.39
Alfa Tools C6F50554B 1 X 1/2 HSS 90° 6 FLUTE COUNTERSINK

Alfa Tools C6F50554B 1 X 1/2 HSS 90° 6 FLUTE COUNTERSINK

SKU: AT-C6F50554B
MPN: C6F50554B

Save $48.39