Countersinks

Countersinks

Made in USA since 1992

Which material is right for your job?

Carbide
Carbide Holds its edge in steel and stainless 1, 3 and 6 flute; 60° to 100° Best for Production countersinking, harder material
Cobalt
HSS
HSS Economical, widely used Single and 4 flute; 60°, 82°, 90° Best for General shop work, softer materials

We stock Carbide and HSS countersinks in Single Flute, Three Flute, Four Flute and Six Flute configurations. Chatter in countersinking comes from cutting edges entering and leaving the cut — the tool deflects as an edge engages and springs back as it exits. The two ways around it pull in opposite directions: a single flute cuts with one continuous edge so there is no load-and-release cycle, and it fits holes too small for a multi-flute tool; a six-flute design keeps at least two edges engaged at once and spreads the cutting force evenly around the tool, which is why six-flute countersinks are sold for chatter-free work. Either way, feed positively and let the tool cut rather than rub.

Carbide holds its edge longer in steel and stainless, while HSS remains an economical choice for general shop use. All countersinks are manufactured in the USA and typically ship the same day.

  • Compare SKU Vendor Size (D1) Shank Diameter (D2) Overall Length (L1) Included Angle (A) Number of Flutes Coating In Stock Price Quantity
    A78576 ACT 3/16 3/16 2.0000 (2) 120° 1 Uncoated 49
    $63.83
  • A78547 ACT 3/16 3/16 2.0000 (2) 120° 4 Uncoated 89
    $12.49
  • A78518 ACT 3/16 3/16 2.0000 (2) 120° 4 Uncoated 64
    $63.83
  • A78490 ACT 3/16 3/16 2.0000 (2) 120° 6 Uncoated 60
    $63.83
  • A78466 ACT 1/2 1/2 2.6250 (2-5/8) 60° 0 Uncoated 29
    $69.05
  • A47095 ACT 1/4 1/4 2 82° 6 Uncoated 30
    $24.70
  • A47061 ACT 1/4 1/4 2 82° 3 Uncoated 24
    $24.70
  • A47037 ACT 1/4 1/4 2 82° 1 Uncoated 28
    $24.70
  • A46557 ACT 1 1/2 4-3/8 82° 4 Uncoated 19
    $103.98
  • A46536 ACT 3/4 1/2 1-27/32 60° 1 Uncoated 34
    $37.36
  • A78648 ACT 1/4 1/4 2.0000 (2) 60° 1 Uncoated 26
    $19.22
  • A78637 ACT 1/4 1/4 2.0000 (2) 60° 1 Uncoated 60
    $80.32
  • A78614 ACT 1/4 1/4 2.0000 (2) 60° 4 Uncoated 80
    $12.90
  • A78585 ACT 1/4 1/4 2.0000 (2) 60° 4 Uncoated 51
    $80.32
  • A78527 ACT 1/4 1/4 2.0000 (2) 60° 6 Uncoated 61
    $80.32
  • A78467 ACT 1/2 1/2 2.8750 (2-7/8) 60° 0 Uncoated 15
    $113.22
  • A47103 ACT 1/4 1/4 2 90° 6 Uncoated 100
    $24.70
  • A47069 ACT 1/4 1/4 2 90° 3 Uncoated 64
    $24.70
  • A47045 ACT 1/4 1/4 2 90° 1 Uncoated 100
    $24.70
  • A46541 ACT 3/4 1/2 1-27/32 82° 1 Uncoated 78
    $37.36
  • A78656 ACT 1/4 1/4 2.0000 (2) 82° 1 Uncoated 75
    $19.22
  • A78645 ACT 1/4 1/4 2.0000 (2) 82° 1 Uncoated 46
    $80.32
  • A78622 ACT 1/4 1/4 2.0000 (2) 82° 4 Uncoated 63
    $12.90
  • A78593 ACT 1/4 1/4 2.0000 (2) 82° 4 Uncoated 50
    $80.32
  • A78535 ACT 1/4 1/4 2.0000 (2) 82° 6 Uncoated 46
    $80.32
  • A78456 ACT 1/2 1/2 2.6250 (2-5/8) 82° 0 Uncoated 45
    $69.05
  • A56084 ACT 1/4 1/4 2 100° 6 Uncoated 86
    $24.70
  • A56076 ACT 1/4 1/4 2 100° 3 Uncoated 43
    $24.70
  • A56068 ACT 1/4 1/4 2 100° 1 Uncoated 78
    $24.70
  • A46546 ACT 3/4 1/2 1-27/32 90° 1 Uncoated 49
    $37.36
  • A78664 ACT 1/4 1/4 2.0000 (2) 90° 1 Uncoated 43
    $19.22
  • A78630 ACT 1/4 1/4 2.0000 (2) 90° 4 Uncoated 41
    $12.90
  • A78561 ACT 1/4 1/4 2.0000 (2) 90° 1 Uncoated 37
    $80.32
  • A78503 ACT 1/4 1/4 2.0000 (2) 90° 4 Uncoated 17
    $80.32
  • A78475 ACT 1/4 1/4 2.0000 (2) 90° 6 Uncoated 17
    $80.32
  • A78457 ACT 1/2 1/2 2.8750 (2-7/8) 82° 0 Uncoated 10
    $113.22
  • A47088 ACT 3/8 1/4 2-1/2 60° 6 Uncoated 100
    $44.69
  • A47054 ACT 3/8 1/4 2-1/2 60° 3 Uncoated 58
    $44.69
  • A47030 ACT 3/8 1/4 2 60° 1 Uncoated 22
    $44.69
  • A46537 ACT 1 1/2 2-13/16 60° 1 Uncoated 21
    $58.13
  • A78598 ACT 1/4 1/4 2.0000 (2) 100° 1 Uncoated 31
    $19.22
  • A78569 ACT 1/4 1/4 2.0000 (2) 100° 1 Uncoated 34
    $80.32
  • A78540 ACT 1/4 1/4 2.0000 (2) 100° 4 Uncoated 22
    $12.90
  • A78511 ACT 1/4 1/4 2.0000 (2) 100° 4 Uncoated 29
    $80.32
  • A78483 ACT 1/4 1/4 2.0000 (2) 100° 6 Uncoated 33
    $80.32
  • A78461 ACT 1/2 1/2 2.6250 (2-5/8) 90° 0 Uncoated 20
    $69.05
  • A47096 ACT 3/8 1/4 2-1/2 82° 6 Uncoated 47
    $44.69
  • A47062 ACT 3/8 1/4 2-1/2 82° 3 Uncoated 43
    $44.69
  • A47038 ACT 3/8 1/4 2 82° 1 Uncoated 38
    $44.69
  • A46542 ACT 1 1/2 2-13/16 82° 1 Uncoated 100
    $58.13
  • A78606 ACT 1/4 1/4 2.0000 (2) 120° 1 Uncoated 69
    $19.22
  • A78577 ACT 1/4 1/4 2.0000 (2) 120° 1 Uncoated 19
    $80.32
  • A78548 ACT 1/4 1/4 2.0000 (2) 120° 4 Uncoated 73
    $12.90
  • A78519 ACT 1/4 1/4 2.0000 (2) 120° 4 Uncoated 52
    $80.32
  • A78491 ACT 1/4 1/4 2.0000 (2) 120° 6 Uncoated 31
    $80.32
  • A78462 ACT 1/2 1/2 2.8750 (2-7/8) 90° 0 Uncoated 13
    $113.22
  • A47104 ACT 3/8 1/4 2-1/2 90° 6 Uncoated 100
    $44.69
  • A47070 ACT 3/8 1/4 2-1/2 90° 3 Uncoated 18
    $44.69
  • A47046 ACT 3/8 1/4 2 90° 1 Uncoated 18
    $44.69
  • A46547 ACT 1 1/2 2-13/16 90° 1 Uncoated 61
    $58.13
  • A78649 ACT 5/16 5/16 2.5000 (2-1/2) 60° 1 Uncoated 57
    $21.97
  • A78638 ACT 5/16 5/16 2.5000 (2-1/2) 60° 1 Uncoated 65
    $129.13
  • A78615 ACT 5/16 5/16 2.5000 (2-1/2) 60° 4 Uncoated 50
    $15.04
  • A78586 ACT 5/16 5/16 2.5000 (2-1/2) 60° 4 Uncoated 60
    $129.13
  • A78528 ACT 5/16 5/16 2.5000 (2-1/2) 60° 6 Uncoated 51
    $129.13
  • A56085 ACT 3/8 1/4 2-5/8 100° 6 Uncoated 81
    $44.69
  • A56077 ACT 3/8 1/4 2-5/8 100° 3 Uncoated 7
    $44.69
  • A56069 ACT 3/8 1/4 2-5/8 100° 1 Uncoated 100
    $44.69
  • A78657 ACT 5/16 5/16 2.5000 (2-1/2) 82° 1 Uncoated 58
    $21.97
  • A78623 ACT 5/16 5/16 2.5000 (2-1/2) 82° 4 Uncoated 75
    $15.04
  • A78594 ACT 5/16 5/16 2.5000 (2-1/2) 82° 4 Uncoated 65
    $129.13
  • A78554 ACT 5/16 5/16 2.5000 (2-1/2) 82° 1 Uncoated 60
    $129.13
  • A78536 ACT 5/16 5/16 2.5000 (2-1/2) 82° 6 Uncoated 60
    $129.13
  • A47089 ACT 1/2 1/4 2-1/2 60° 6 Uncoated 100
    $55.13
  • A47055 ACT 1/2 1/4 2-1/2 60° 3 Uncoated 22
    $55.13
  • A47031 ACT 1/2 1/4 2 60° 1 Uncoated 48
    $55.13
  • A78665 ACT 5/16 5/16 2.5000 (2-1/2) 90° 1 Uncoated 59
    $21.97
  • A78631 ACT 5/16 5/16 2.5000 (2-1/2) 90° 4 Uncoated 85
    $15.04
  • A78562 ACT 5/16 5/16 2.5000 (2-1/2) 90° 1 Uncoated 59
    $129.13
  • A78504 ACT 5/16 5/16 2.5000 (2-1/2) 90° 4 Uncoated 65
    $129.13
  • A78476 ACT 5/16 5/16 2.5000 (2-1/2) 90° 6 Uncoated 46
    $129.13
  • A47097 ACT 1/2 1/4 2-1/2 82° 6 Uncoated 100
    $55.13
  • A47063 ACT 1/2 1/4 2-1/2 82° 3 Uncoated 21
    $55.13
  • A47039 ACT 1/2 1/4 2 82° 1 Uncoated 63
    $55.13
  • A78599 ACT 5/16 5/16 2.5000 (2-1/2) 100° 1 Uncoated 58
    $21.97
  • A78570 ACT 5/16 5/16 2.5000 (2-1/2) 100° 1 Uncoated 63
    $129.13
  • A78541 ACT 5/16 5/16 2.5000 (2-1/2) 100° 4 Uncoated 81
    $15.04
  • A78512 ACT 5/16 5/16 2.5000 (2-1/2) 100° 4 Uncoated 60
    $129.13
  • A78484 ACT 5/16 5/16 2.5000 (2-1/2) 100° 6 Uncoated 59
    $129.13
  • A47105 ACT 1/2 1/4 2-1/2 90° 6 Uncoated 55
    $55.13
  • A47071 ACT 1/2 1/4 2-1/2 90° 3 Uncoated 33
    $55.13
  • A47047 ACT 1/2 1/4 2 90° 1 Uncoated 29
    $55.13
  • A78607 ACT 5/16 5/16 2.5000 (2-1/2) 120° 1 Uncoated 76
    $21.97
  • A78578 ACT 5/16 5/16 2.5000 (2-1/2) 120° 1 Uncoated 61
    $129.13
  • A78549 ACT 5/16 5/16 2.5000 (2-1/2) 120° 4 Uncoated 19
    $15.04
  • A78520 ACT 5/16 5/16 2.5000 (2-1/2) 120° 4 Uncoated 65
    $129.13
  • A78492 ACT 5/16 5/16 2.5000 (2-1/2) 120° 6 Uncoated 39
    $129.13
  • A56086 ACT 1/2 1/4 2-5/8 100° 6 Uncoated 31
    $55.13
  • A56078 ACT 1/2 1/4 2-5/8 100° 3 Uncoated 53
    $55.13
  • A56070 ACT 1/2 1/4 2-5/8 100° 1 Uncoated 68
    $55.13
  • Total: items /

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