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Countersinking Bits

Countersinking Bits

Bolt and Nut Australia carry the largest range of drills, holesaws, auger bits, spade bits, countersinking bits, reduced shank drills bits and accessories. We stock reputable brands like Alpha, sheffield, bristol, clever tool. smart bit, hobson and Sutton tools. Technical specifications, printable datasheets and product cad drawings available online. Delivered freight free from our Brisbane warehouse with no minimum order qty or spend.

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  1. Free shipping

    In stock

    6.3mm x 46mm HSS Cobalt 3 Flute 90° Countersink Bit (Range: 1-6.3mm) Alpha CS3-6.3
    6.3mm x 46mm HSS Cobalt 3 Flute 90° Countersink Bit (Range: 1-6.3mm) Alpha CS3-6.3
    As low as $27.20
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    5% OFF for orders under $99
    10% OFF for orders between $100 and $249
    15% OFF for orders over $250
  2. Free shipping

    In stock

    8.3mm x 46mm HSS Cobalt 3 Flute 90° Countersink Bit (Range: 1-8.3mm) Alpha CS3-8.3
    8.3mm x 46mm HSS Cobalt 3 Flute 90° Countersink Bit (Range: 1-8.3mm) Alpha CS3-8.3
    As low as $30.60
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    15% OFF for orders over $250
  3. Free shipping

    In stock

    8mm x 35mm HSS 5 Flute 90° Countersink Bit (Range: 1-8mm) Alpha CS5-8
    8mm x 35mm HSS 5 Flute 90° Countersink Bit (Range: 1-8mm) Alpha CS5-8
    As low as $28.90
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  4. Free shipping

    In stock

    10mm x 46mm HSS Cobalt 1 Flute 90° Countersink Bit (Range: 1-10mm) Alpha CS1-10
    10mm x 46mm HSS Cobalt 1 Flute 90° Countersink Bit (Range: 1-10mm) Alpha CS1-10
    As low as $32.29
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  5. Free shipping

    In stock

    10.4mm x 54mm HSS Cobalt 3 Flute 90° Countersink Bit (Range: 1-10.4mm) Alpha CS3-10.4
    10.4mm x 54mm HSS Cobalt 3 Flute 90° Countersink Bit (Range: 1-10.4mm) Alpha CS3-10.4
    As low as $35.70
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    15% OFF for orders over $250
  6. Free shipping

    In stock

    12mm x 39mm HSS 5 Flute 90° Countersink Bit (Range: 1-12mm) Alpha CS5-12
    12mm x 39mm HSS 5 Flute 90° Countersink Bit (Range: 1-12mm) Alpha CS5-12
    As low as $34.00
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  7. Free shipping

    In stock

    12.4mm x 54mm HSS Cobalt 3 Flute 90° Countersink Bit (Range: 2-12.4mm) Alpha CS3-12.4
    12.4mm x 54mm HSS Cobalt 3 Flute 90° Countersink Bit (Range: 2-12.4mm) Alpha CS3-12.4
    As low as $38.25
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    15% OFF for orders over $250
  8. Free shipping

    In stock

    13mm x 42mm HSS Cobalt 3 Flute 90° Countersink 1/4" Hex Quick Change Alpha CS3-13QR
    13mm x 42mm HSS Cobalt 3 Flute 90° Countersink 1/4" Hex Quick Change Alpha CS3-13QR
    As low as $38.25
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    5% OFF for orders under $99
    10% OFF for orders between $100 and $249
    15% OFF for orders over $250
  9. Free shipping

    In stock

    14mm x 46mm HSS Cobalt Cross Hole 90° Deburrer Countersink Bit (Range: 6-13mm) Alpha CSCH-14
    14mm x 46mm HSS Cobalt Cross Hole 90° Deburrer Countersink Bit (Range: 6-13mm) Alpha CSCH-14
    As low as $46.75
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    5% OFF for orders under $99
    10% OFF for orders between $100 and $249
    15% OFF for orders over $250
  10. Free shipping

    In stock

    14.4mm x 56mm HSS Cobalt 3 Flute 90° Countersink Bit (Range: 2-14.4mm) Alpha CS3-14.4
    14.4mm x 56mm HSS Cobalt 3 Flute 90° Countersink Bit (Range: 2-14.4mm) Alpha CS3-14.4
    As low as $44.20
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    5% OFF for orders under $99
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    15% OFF for orders over $250
  11. Free shipping

    In stock

    16mm x 43mm HSS Cobalt 3 Flute 90° Countersink 1/4" Hex Quick Change Alpha CS3-16QR
    16mm x 43mm HSS Cobalt 3 Flute 90° Countersink 1/4" Hex Quick Change Alpha CS3-16QR
    As low as $47.60
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    5% OFF for orders under $99
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    15% OFF for orders over $250
  12. Free shipping

    In stock

    16mm x 46.5mm HSS Cobalt 1 Flute 90° Countersink Bit (Range: 2-16mm) Alpha CS1-16
    16mm x 46.5mm HSS Cobalt 1 Flute 90° Countersink Bit (Range: 2-16mm) Alpha CS1-16
    As low as $46.75
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    5% OFF for orders under $99
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    15% OFF for orders over $250
  13. Free shipping

    In stock

    16mm x 52mm HSS 5 Flute 90° Countersink Bit (Range: 1-16mm) Alpha CS5-16
    16mm x 52mm HSS 5 Flute 90° Countersink Bit (Range: 1-16mm) Alpha CS5-16
    As low as $46.75
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    10% OFF for orders between $100 and $249
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  14. Free shipping

    In stock

    16.5mm x 60mm HSS Cobalt 3 Flute 90° Countersink Bit (Range: 2-16.5mm) Alpha CS3-16.5
    16.5mm x 60mm HSS Cobalt 3 Flute 90° Countersink Bit (Range: 2-16.5mm) Alpha CS3-16.5
    As low as $59.50
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  15. Free shipping

    In stock

    19mm x 45.5mm HSS Cobalt 3 Flute 90° Countersink 1/4" Hex Quick Change Alpha CS3-19QR
    19mm x 45.5mm HSS Cobalt 3 Flute 90° Countersink 1/4" Hex Quick Change Alpha CS3-19QR
    As low as $60.35
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    5% OFF for orders under $99
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  16. Free shipping

    In stock

    20mm x 47mm HSS Cobalt 1 Flute 90° Countersink Bit (Range: 2-20mm) Alpha CS1-20
    20mm x 47mm HSS Cobalt 1 Flute 90° Countersink Bit (Range: 2-20mm) Alpha CS1-20
    As low as $62.90
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    5% OFF for orders under $99
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    15% OFF for orders over $250
  17. Free shipping

    In stock

    20mm x 58mm HSS 5 Flute 90° Countersink Bit (Range: 1-20mm) Alpha CS5-20
    20mm x 58mm HSS 5 Flute 90° Countersink Bit (Range: 1-20mm) Alpha CS5-20
    As low as $55.25
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    5% OFF for orders under $99
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    15% OFF for orders over $250
  18. Free shipping

    In stock

    20.5mm x 63mm HSS Cobalt 3 Flute 90° Countersink Bit (Range: 2-20.5mm) Alpha CS3-20.5
    20.5mm x 63mm HSS Cobalt 3 Flute 90° Countersink Bit (Range: 2-20.5mm) Alpha CS3-20.5
    As low as $72.25
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  19. Free shipping

    In stock

    21.5mm x 64.5mm HSS Cobalt Cross Hole 90° Deburrer Countersink Bit (Range: 8-19mm) Alpha CSCH-21
    21.5mm x 64.5mm HSS Cobalt Cross Hole 90° Deburrer Countersink Bit (Range: 8-19mm) Alpha CSCH-21
    As low as $80.75
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  20. Free shipping

    In stock

    25mm x 51mm HSS Cobalt 1 Flute 90° Countersink Bit (Range: 3-25mm) Alpha CS1-25
    25mm x 51mm HSS Cobalt 1 Flute 90° Countersink Bit (Range: 3-25mm) Alpha CS1-25
    As low as $78.20
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  21. Free shipping

    In stock

    25mm x 51mm HSS Cobalt 3 Flute 90° Countersink Bit (Range: 3-25mm) Alpha CS3-25
    25mm x 51mm HSS Cobalt 3 Flute 90° Countersink Bit (Range: 3-25mm) Alpha CS3-25
    As low as $85.00
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  22. Free shipping

    In stock

    28mm x 80mm HSS Cobalt Cross Hole 90° Deburrer Countersink Bit (Range: 10-24mm) Alpha CSCH-28
    28mm x 80mm HSS Cobalt Cross Hole 90° Deburrer Countersink Bit (Range: 10-24mm) Alpha CSCH-28
    As low as $127.50
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  23. Free shipping

    In stock

    30mm x 71mm HSS Cobalt 1 Flute 90° Countersink Bit (Range: 3-30mm) Alpha CS1-30
    30mm x 71mm HSS Cobalt 1 Flute 90° Countersink Bit (Range: 3-30mm) Alpha CS1-30
    As low as $139.40
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  24. Free shipping

    In stock

    30mm x 71mm HSS Cobalt 3 Flute 90° Countersink Bit (Range: 3-30mm) Alpha CS3-30
    30mm x 71mm HSS Cobalt 3 Flute 90° Countersink Bit (Range: 3-30mm) Alpha CS3-30
    As low as $136.00
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    15% OFF for orders over $250
  25. Free shipping

    In stock

    35mm x 97mm HSS Cobalt Cross Hole 90° Deburrer Countersink Bit (Range: 12-32mm) Alpha CSCH-35
    35mm x 97mm HSS Cobalt Cross Hole 90° Deburrer Countersink Bit (Range: 12-32mm) Alpha CSCH-35
    As low as $225.25
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  26. Free shipping

    In stock

    40mm x 80mm HSS Cobalt 3 Flute 90° Countersink Bit(Range: 3-40mm) Alpha CS3-40
    40mm x 80mm HSS Cobalt 3 Flute 90° Countersink Bit(Range: 3-40mm) Alpha CS3-40
    As low as $293.25
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  27. Free shipping

    In stock

    44mm x 115mm HSS Cobalt Cross Hole 90° Deburrer Countersink Bit (Range: 16-40mm) Alpha CSCH-44
    44mm x 115mm HSS Cobalt Cross Hole 90° Deburrer Countersink Bit (Range: 16-40mm) Alpha CSCH-44
    As low as $450.50
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