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
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
    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
  • A47063 ACT 1/2 1/4 2-1/2 82° 3 Uncoated 89
    $55.13
  • A47039 ACT 1/2 1/4 2 82° 1 Uncoated 51
    $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
  • A47098 ACT 5/8 1/2 2-5/8 82° 6 Uncoated 20
    $80.81
  • 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 21
    $55.13
  • A79318 ACT 5/8 3/8 2-3/4 82° 6 ALTiN 100
    $91.37
  • 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
  • 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 41
    $55.13
  • A78650 ACT 3/8 3/8 2.5000 (2-1/2) 60° 1 Uncoated 82
    $24.58
  • A78639 ACT 3/8 3/8 2.5000 (2-1/2) 60° 1 Uncoated 64
    $152.92
  • A78616 ACT 3/8 3/8 2.5000 (2-1/2) 60° 4 Uncoated 87
    $16.86
  • A78587 ACT 3/8 3/8 2.5000 (2-1/2) 60° 4 Uncoated 61
    $152.92
  • A78529 ACT 3/8 3/8 2.5000 (2-1/2) 60° 6 Uncoated 44
    $152.92
  • A47099 ACT 3/4 1/2 2-3/4 82° 6 Uncoated 24
    $114.54
  • A47056 ACT 5/8 1/2 2-5/8 60° 3 Uncoated 55
    $80.81
  • A47032 ACT 5/8 1/2 2-3/4 60° 1 Uncoated 25
    $80.81
  • A79319 ACT 3/4 3/8 2-3/4 82° 6 ALTiN 100
    $125.09
  • A78658 ACT 3/8 3/8 2.5000 (2-1/2) 82° 1 Uncoated 69
    $24.58
  • A78624 ACT 3/8 3/8 2.5000 (2-1/2) 82° 4 Uncoated 59
    $16.86
  • A78555 ACT 3/8 3/8 2.5000 (2-1/2) 82° 1 Uncoated 55
    $152.92
  • A78497 ACT 3/8 3/8 2.5000 (2-1/2) 82° 4 Uncoated 60
    $152.92
  • A78469 ACT 3/8 3/8 2.5000 (2-1/2) 82° 6 Uncoated 52
    $152.92
  • A47064 ACT 5/8 1/2 2-5/8 82° 3 Uncoated 24
    $80.81
  • A47040 ACT 5/8 1/2 2-3/4 82° 1 Uncoated 61
    $80.81
  • A78666 ACT 3/8 3/8 2.5000 (2-1/2) 90° 1 Uncoated 45
    $24.58
  • A78632 ACT 3/8 3/8 2.5000 (2-1/2) 90° 4 Uncoated 54
    $16.86
  • A78563 ACT 3/8 3/8 2.5000 (2-1/2) 90° 1 Uncoated 53
    $152.92
  • A78505 ACT 3/8 3/8 2.5000 (2-1/2) 90° 4 Uncoated 58
    $152.92
  • A78477 ACT 3/8 3/8 2.5000 (2-1/2) 90° 6 Uncoated 32
    $152.92
  • A47100 ACT 1 1/2 3 82° 6 Uncoated 19
    $194.77
  • A47072 ACT 5/8 1/2 2-5/8 90° 3 Uncoated 18
    $80.81
  • A47048 ACT 5/8 1/2 2-3/4 90° 1 Uncoated 28
    $80.81
  • A79320 ACT 1 1/2 3 82° 6 ALTiN 100
    $211.39
  • A78600 ACT 3/8 3/8 2.5000 (2-1/2) 100° 1 Uncoated 41
    $24.58
  • A78571 ACT 3/8 3/8 2.5000 (2-1/2) 100° 1 Uncoated 63
    $152.92
  • A78542 ACT 3/8 3/8 2.5000 (2-1/2) 100° 4 Uncoated 75
    $16.86
  • A78513 ACT 3/8 3/8 2.5000 (2-1/2) 100° 4 Uncoated 50
    $152.92
  • A78485 ACT 3/8 3/8 2.5000 (2-1/2) 100° 6 Uncoated 48
    $152.92
  • A56079 ACT 5/8 3/8 2-3/4 100° 3 Uncoated 76
    $80.81
  • A56071 ACT 5/8 3/8 2-3/4 100° 1 Uncoated 46
    $80.81
  • A78608 ACT 3/8 3/8 2.5000 (2-1/2) 120° 1 Uncoated 44
    $24.58
  • A78579 ACT 3/8 3/8 2.5000 (2-1/2) 120° 1 Uncoated 51
    $152.92
  • A78550 ACT 3/8 3/8 2.5000 (2-1/2) 120° 4 Uncoated 82
    $16.86
  • A78521 ACT 3/8 3/8 2.5000 (2-1/2) 120° 4 Uncoated 57
    $152.92
  • A78493 ACT 3/8 3/8 2.5000 (2-1/2) 120° 6 Uncoated 49
    $152.92
  • A47101 ACT 1/8 1/8 1-1/2 90° 6 Uncoated 23
    $20.36
  • A47057 ACT 3/4 1/2 2-3/4 60° 3 Uncoated 50
    $114.54
  • A47033 ACT 3/4 1/2 2-3/4 60° 1 Uncoated 28
    $114.54
  • A79321 ACT 1/8 1/8 1-1/2 90° 6 ALTiN 100
    $25.56
  • A78651 ACT 1/2 1/2 3.0000 (3) 60° 1 Uncoated 83
    $30.71
  • A78640 ACT 1/2 1/2 3.0000 (3) 60° 1 Uncoated 64
    $248.91
  • A78617 ACT 1/2 1/2 3.0000 (3) 60° 4 Uncoated 54
    $20.99
  • A78588 ACT 1/2 1/2 3.0000 (3) 60° 4 Uncoated 51
    $248.91
  • A78530 ACT 1/2 1/2 3.0000 (3) 60° 6 Uncoated 58
    $248.91
  • A47065 ACT 3/4 1/2 2-3/4 82° 3 Uncoated 36
    $114.54
  • A47041 ACT 3/4 1/2 2-3/4 82° 1 Uncoated 24
    $114.54
  • A78659 ACT 1/2 1/2 3.0000 (3) 82° 1 Uncoated 48
    $30.71
  • A78625 ACT 1/2 1/2 3.0000 (3) 82° 4 Uncoated 51
    $20.99
  • A78556 ACT 1/2 1/2 3.0000 (3) 82° 1 Uncoated 55
    $248.91
  • A78498 ACT 1/2 1/2 3.0000 (3) 82° 4 Uncoated 25
    $248.91
  • A78470 ACT 1/2 1/2 3.0000 (3) 82° 6 Uncoated 51
    $248.91
  • A47102 ACT 3/16 3/16 2 90° 6 Uncoated 100
    $21.64
  • A47073 ACT 3/4 1/2 2-3/4 90° 3 Uncoated 78
    $114.54
  • A47049 ACT 3/4 1/2 2-3/4 90° 1 Uncoated 48
    $114.54
  • A79322 ACT 3/16 3/16 2 90° 6 ALTiN 100
    $27.50
  • A78667 ACT 1/2 1/2 3.0000 (3) 90° 1 Uncoated 46
    $30.71
  • A78633 ACT 1/2 1/2 3.0000 (3) 90° 4 Uncoated 62
    $20.99
  • A78564 ACT 1/2 1/2 3.0000 (3) 90° 1 Uncoated 60
    $248.91
  • A78506 ACT 1/2 1/2 3.0000 (3) 90° 4 Uncoated 40
    $248.91
  • A78478 ACT 1/2 1/2 3.0000 (3) 90° 6 Uncoated 51
    $248.91
  • A56080 ACT 3/4 3/8 2-3/4 100° 3 Uncoated 13
    $114.54
  • A56072 ACT 3/4 3/8 2-3/4 100° 1 Uncoated 64
    $114.54
  • A78601 ACT 1/2 1/2 3.0000 (3) 100° 1 Uncoated 41
    $30.71
  • A78572 ACT 1/2 1/2 3.0000 (3) 100° 1 Uncoated 49
    $248.91
  • A78543 ACT 1/2 1/2 3.0000 (3) 100° 4 Uncoated 63
    $20.99
  • A78514 ACT 1/2 1/2 3.0000 (3) 100° 4 Uncoated 32
    $248.91
  • A78486 ACT 1/2 1/2 3.0000 (3) 100° 6 Uncoated 39
    $248.91
  • A47103 ACT 1/4 1/4 2 90° 6 Uncoated 100
    $24.70
  • A47058 ACT 1 1/2 3 60° 3 Uncoated 54
    $194.77
  • A47034 ACT 1 1/2 3 60° 1 Uncoated 56
    $194.77
  • A79323 ACT 1/4 1/4 2 90° 6 ALTiN 100
    $31.71
  • A78609 ACT 1/2 1/2 3.0000 (3) 120° 1 Uncoated 74
    $30.71
  • A78580 ACT 1/2 1/2 3.0000 (3) 120° 1 Uncoated 47
    $248.91
  • A78551 ACT 1/2 1/2 3.0000 (3) 120° 4 Uncoated 69
    $20.99
  • A78522 ACT 1/2 1/2 3.0000 (3) 120° 4 Uncoated 47
    $248.91
  • Total: items /

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