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Countersunk Head Socket

Countersunk Head Socket

Bolt and Nut Australia carry the largest range of Countersunk head socket screws. Countersunk head (also known as flat head) socket screws are a flat head with a tapered underside, have a hex allen drive and come either fully threaded or part thread. To determine the length measure the overall length including the head. Countersunk head socket screws are made from high tensile steel and are very popular because of their excellent tensile strength, hex allen key drive and flat head shape. We have Stainless Steel A2-70 G304, Marine Grade Stainless Steel A4-70 G316 , Zinc Plated and Plain Black in Metric coarse, American Inch threads UNC (unified national coarse), UNF (unified national fine) and BSW (british standard whitworth). 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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    In stock

    M2 x 0.40p Metric Coarse Stainless A2-70 G304 Countersunk Head Socket (1.27mm Key) Screws DIN 7991
    M2 x 0.40p Metric Coarse Stainless A2-70 G304 Countersunk Head Socket (1.27mm Key) Screws DIN 7991
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  2. Free shipping

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    M2 x 0.40p Metric Coarse Stainless A4-70 G316 Countersunk Head Socket (1.3mm Key) Screws DIN 7991
    M2 x 0.40p Metric Coarse Stainless A4-70 G316 Countersunk Head Socket (1.3mm Key) Screws DIN 7991
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    M2.5 x 0.45p Metric Coarse Stainless A2-70 G304 Countersunk Head Socket (1.5mm Key) Screws DIN 7991
    M2.5 x 0.45p Metric Coarse Stainless A2-70 G304 Countersunk Head Socket (1.5mm Key) Screws DIN 7991
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    M2.5 x 0.45p Metric Coarse Stainless A4-70 G316 Countersunk Head Socket (1.5mm Key) Screws DIN 7991
    M2.5 x 0.45p Metric Coarse Stainless A4-70 G316 Countersunk Head Socket (1.5mm Key) Screws DIN 7991
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  5. Free shipping

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    M2.5 x 0.45p Metric Coarse Plain Black Uncoated Class 12.9 Countersunk Head Socket (1.5mm Key) Screws DIN 7991
    M2.5 x 0.45p Metric Coarse Plain Black Uncoated Class 12.9 Countersunk Head Socket (1.5mm Key) Screws DIN 7991
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  6. Free shipping

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    M3 x 0.50p Metric Coarse Stainless A2-70 G304 Countersunk Head Socket (2mm Key) Screws DIN 7991
    M3 x 0.50p Metric Coarse Stainless A2-70 G304 Countersunk Head Socket (2mm Key) Screws DIN 7991
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    M3 x 0.50p Metric Coarse Stainless A4-70 G316 Countersunk Head Socket (2mm Key) Screws DIN 7991
    M3 x 0.50p Metric Coarse Stainless A4-70 G316 Countersunk Head Socket (2mm Key) Screws DIN 7991
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    M3 x 0.50p Metric Coarse Zinc Class 12.9 Countersunk Head Socket (2mm Key) Screws DIN 7991
    M3 x 0.50p Metric Coarse Zinc Class 12.9 Countersunk Head Socket (2mm Key) Screws DIN 7991
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  9. Free shipping

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    M3 x 0.50p Metric Coarse Plain Black Uncoated Class 12.9 Countersunk Head Socket (2mm Key) Screws DIN 7991
    M3 x 0.50p Metric Coarse Plain Black Uncoated Class 12.9 Countersunk Head Socket (2mm Key) Screws DIN 7991
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  10. Free shipping

    In stock

    M4 x 0.70p Metric Coarse Stainless A2-70 G304 Countersunk Head Socket (2.5mm Key) Screws DIN 7991
    M4 x 0.70p Metric Coarse Stainless A2-70 G304 Countersunk Head Socket (2.5mm Key) Screws DIN 7991
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  11. Free shipping

    In stock

    M4 x 0.70p Metric Coarse Stainless A4-70 G316 Countersunk Head Socket (2.5mm Key) Screws DIN 7991
    M4 x 0.70p Metric Coarse Stainless A4-70 G316 Countersunk Head Socket (2.5mm Key) Screws DIN 7991
    As low as each

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  12. Free shipping

    In stock

    M4 x 0.70p Metric Coarse Zinc Class 12.9 Countersunk Head Socket (2.5mm Key) Screws DIN 7991
    M4 x 0.70p Metric Coarse Zinc Class 12.9 Countersunk Head Socket (2.5mm Key) Screws DIN 7991
    As low as each

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  13. Free shipping

    In stock

    M4 x 0.70p Metric Coarse Plain Black Uncoated Class 12.9 Countersunk Head Socket (2.5mm Key) Screws DIN 7991
    M4 x 0.70p Metric Coarse Plain Black Uncoated Class 12.9 Countersunk Head Socket (2.5mm Key) Screws DIN 7991
    As low as each

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  14. Free shipping

    In stock

    M5 x 0.80p Metric Coarse Stainless A2-70 G304 Countersunk Head Socket (3mm Key) Screws DIN 7991
    M5 x 0.80p Metric Coarse Stainless A2-70 G304 Countersunk Head Socket (3mm Key) Screws DIN 7991
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  15. Free shipping

    In stock

    M5 x 0.80p Metric Coarse Stainless A4-70 G316 Countersunk Head Socket (3mm Key) Screws DIN 7991
    M5 x 0.80p Metric Coarse Stainless A4-70 G316 Countersunk Head Socket (3mm Key) Screws DIN 7991
    As low as each

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  16. Free shipping

    In stock

    M5 x 0.80p Metric Coarse Zinc Class 12.9 Countersunk Head Socket (3mm Key) Screws DIN 7991
    M5 x 0.80p Metric Coarse Zinc Class 12.9 Countersunk Head Socket (3mm Key) Screws DIN 7991
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  17. Free shipping

    In stock

    M5 x 0.80p Metric Coarse Plain Black Uncoated Class 12.9 Countersunk Head Socket (3mm Key) Screws DIN 7991
    M5 x 0.80p Metric Coarse Plain Black Uncoated Class 12.9 Countersunk Head Socket (3mm Key) Screws DIN 7991
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  18. Free shipping

    In stock

    M6 x 1.00p Metric Coarse Stainless A2-70 G304 Countersunk Head Socket (4mm Key) Screws DIN 7991
    M6 x 1.00p Metric Coarse Stainless A2-70 G304 Countersunk Head Socket (4mm Key) Screws DIN 7991
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  19. Free shipping

    In stock

    M6 x 1.00p Metric Coarse Stainless A4-70 G316 Countersunk Head Socket (4mm Key) Screws DIN 7991
    M6 x 1.00p Metric Coarse Stainless A4-70 G316 Countersunk Head Socket (4mm Key) Screws DIN 7991
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  20. Free shipping

    In stock

    M6 x 1.00p Metric Coarse Zinc Class 12.9 Countersunk Head Socket (4mm Key) Screws DIN 7991
    M6 x 1.00p Metric Coarse Zinc Class 12.9 Countersunk Head Socket (4mm Key) Screws DIN 7991
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  21. Free shipping

    In stock

    M6 x 1.00p Metric Coarse Plain Black Uncoated Class 12.9 Countersunk Head Socket (4mm Key) Screws DIN 7991
    M6 x 1.00p Metric Coarse Plain Black Uncoated Class 12.9 Countersunk Head Socket (4mm Key) Screws DIN 7991
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  22. Free shipping

    In stock

    M8 x 1.25p Metric Coarse Stainless A2-70 G304 Countersunk Head Socket (5mm Key) Screws DIN 7991
    M8 x 1.25p Metric Coarse Stainless A2-70 G304 Countersunk Head Socket (5mm Key) Screws DIN 7991
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  23. Free shipping

    In stock

    M8 x 1.25p Metric Coarse Stainless A4-70 G316 Countersunk Head Socket (5mm Key) Screws DIN 7991
    M8 x 1.25p Metric Coarse Stainless A4-70 G316 Countersunk Head Socket (5mm Key) Screws DIN 7991
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  24. Free shipping

    In stock

    M8 x 1.25p Metric Coarse Zinc Class 12.9 Countersunk Head Socket (5mm Key) Screws DIN 7991
    M8 x 1.25p Metric Coarse Zinc Class 12.9 Countersunk Head Socket (5mm Key) Screws DIN 7991
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  25. Free shipping

    In stock

    M8 x 1.25p Metric Coarse Plain Black Uncoated Class 12.9 Countersunk Head Socket (5mm Key) Screws DIN 7991
    M8 x 1.25p Metric Coarse Plain Black Uncoated Class 12.9 Countersunk Head Socket (5mm Key) Screws DIN 7991
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  26. Free shipping

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    M10 x 1.50p Metric Coarse Stainless A2-70 G304 Countersunk Head Socket (6mm Key) Screws DIN 7991
    M10 x 1.50p Metric Coarse Stainless A2-70 G304 Countersunk Head Socket (6mm Key) Screws DIN 7991
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  27. Free shipping

    In stock

    M10 x 1.50p Metric Coarse Stainless A4-70 G316 Countersunk Head Socket (6mm Key) Screws DIN 7991
    M10 x 1.50p Metric Coarse Stainless A4-70 G316 Countersunk Head Socket (6mm Key) Screws DIN 7991
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  28. Free shipping

    In stock

    M10 x 1.50p Metric Coarse Zinc Class 12.9 Countersunk Head Socket (6mm Key) Screws DIN 7991
    M10 x 1.50p Metric Coarse Zinc Class 12.9 Countersunk Head Socket (6mm Key) Screws DIN 7991
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  29. Free shipping

    In stock

    M10 x 1.50p Metric Coarse Plain Black Uncoated Class 12.9 Countersunk Head Socket (6mm Key) Screws DIN 7991
    M10 x 1.50p Metric Coarse Plain Black Uncoated Class 12.9 Countersunk Head Socket (6mm Key) Screws DIN 7991
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  30. Free shipping

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    M12 x 1.75p Metric Coarse Stainless A2-70 G304 Countersunk Head Socket (8mm Key) Screws DIN 7991
    M12 x 1.75p Metric Coarse Stainless A2-70 G304 Countersunk Head Socket (8mm Key) Screws DIN 7991
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    M12 x 1.75p Metric Coarse Stainless A4-70 G316 Countersunk Head Socket (8mm Key) Screws DIN 7991
    M12 x 1.75p Metric Coarse Stainless A4-70 G316 Countersunk Head Socket (8mm Key) Screws DIN 7991
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    M12 x 1.75p Metric Coarse Zinc Class 12.9 Countersunk Head Socket (8mm Key) Screws DIN 7991
    M12 x 1.75p Metric Coarse Zinc Class 12.9 Countersunk Head Socket (8mm Key) Screws DIN 7991
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  33. Free shipping

    In stock

    M12 x 1.75p Metric Coarse Plain Black Uncoated Class 12.9 Countersunk Head Socket (8mm Key) Screws DIN 7991
    M12 x 1.75p Metric Coarse Plain Black Uncoated Class 12.9 Countersunk Head Socket (8mm Key) Screws DIN 7991
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    M14 x 2.00p Metric Coarse Plain Black Uncoated Class 12.9 Countersunk Head Socket (10mm Key) Screws DIN 7991
    M14 x 2.00p Metric Coarse Plain Black Uncoated Class 12.9 Countersunk Head Socket (10mm Key) Screws DIN 7991
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    M16 x 2.00p Metric Coarse Stainless A2-70 G304 Countersunk Head Socket (10mm Key) Screws DIN 7991
    M16 x 2.00p Metric Coarse Stainless A2-70 G304 Countersunk Head Socket (10mm Key) Screws DIN 7991
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    M16 x 2.00p Metric Coarse Stainless A4-70 G316 Countersunk Head Socket (10mm Key) Screws ISO 10642
    M16 x 2.00p Metric Coarse Stainless A4-70 G316 Countersunk Head Socket (10mm Key) Screws ISO 10642
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    M16 x 2.00p Metric Coarse Plain Black Uncoated Class 12.9 Countersunk Head Socket (10mm Key) Screws DIN 7991
    M16 x 2.00p Metric Coarse Plain Black Uncoated Class 12.9 Countersunk Head Socket (10mm Key) Screws DIN 7991
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System of Measurement
  1. Metric 38 items
Size
  1. M2 (2mm) 2 items
  2. M2.5 (2.5mm) 3 items
  3. M3 (3mm) 4 items
  4. M4 (4mm) 4 items
  5. M5 (5mm) 4 items
  6. M6 (6mm) 4 items
  7. M8 (8mm) 4 items
  8. M10 (10mm) 4 items
  9. M12 (12mm) 4 items
  10. M14 (14mm) 2 items
  11. M16 (16mm) 3 items
Size & Thread Pitch
  1. M2 x 0.40p Coarse 2 items
  2. M2.5 x 0.45p Coarse 3 items
  3. M3 x 0.50p Coarse 4 items
  4. M4 x 0.70p Coarse 4 items
  5. M5 x 0.80p Coarse 4 items
  6. M6 x 1.00p Coarse 4 items
  7. M8 x 1.25p Coarse 4 items
  8. M10 x 1.50p Coarse 4 items
  9. M12 x 1.75p Coarse 4 items
  10. M14 x 2.00p Coarse 2 items
  11. M16 x 2.00p Coarse 3 items
Lengths in mm and inches
  1. 4mm 4 items
  2. 5mm 8 items
  3. 6mm 16 items
  4. 8mm 21 items
  5. 10mm 23 items
  6. 12mm 27 items
  7. 16mm 29 items
  8. 20mm 33 items
  9. 25mm 32 items
  10. 30mm 34 items
  11. 35mm 30 items
  12. 40mm 33 items
  13. 45mm 29 items
  14. 50mm 31 items
  15. 55mm 12 items
  16. 60mm 27 items
  17. 65mm 8 items
  18. 70mm 24 items
  19. 75mm 8 items
  20. 80mm 23 items
  21. 90mm 21 items
  22. 100mm 21 items
  23. 110mm 8 items
  24. 120mm 14 items
  25. 130mm 4 items
  26. 140mm 1 item
  27. 150mm 4 items
  28. 160mm 1 item
  29. 180mm 1 item
  30. 200mm 1 item
  31. 220mm 1 item
  32. 240mm 1 item
  33. 3/16" 5 items
  34. 1/4" 17 items
  35. 5/16" 8 items
  36. 3/8" 24 items
  37. 1/2" 26 items
  38. 5/8" 26 items
  39. 3/4" 40 items
  40. 7/8" 4 items
  41. 1" 36 items
  42. 1-1/4" 29 items
  43. 1-1/2" 29 items
  44. 1-3/4" 1 item
  45. 2" 26 items
  46. 2-1/2" 16 items
  47. 3" 15 items
  48. 3-1/2" 6 items
  49. 4" 6 items
  50. 4-1/2" 1 item
  51. 5" 1 item
  52. 6" 1 item
  53. 7" 1 item
  54. 8" 1 item
Material / Finish
  1. Plain Black Uncoated 10 items
  2. Stainless Steel 21 items
  3. Zinc Silver Plated 7 items
Class / Grade
  1. A2-70 G304 10 items
  2. A4-70 G316 11 items
  3. High Tensile Class 12.9 17 items
Corrosion Protection Level
  1. Ultimate 11 items
  2. Excellent 10 items
  3. Moderate 7 items
  4. Low 10 items
Part or Full Thread
  1. Full Thread (FT) 1 item
Head Diameter Range
  1. 3.50 - 4.40mm 2 items
  2. 4.40 - 5.50mm 3 items
  3. 5.50 - 6.40mm 4 items
  4. 7.00 - 8.00mm 4 items
  5. 9.00 - 10.45mm 4 items
  6. 10.40 - 12.00mm 4 items
  7. 14.00 - 16.00mm 4 items
  8. 18.20 - 21.45mm 4 items
  9. 22.15 - 24.00mm 5 items
  10. 26.73 - 27.00mm 1 item
  11. 29.50 - 30.00mm 3 items
Drive Type
  1. Internal Hex 38 items
Drive Size
  1. 1.27mm 1 item
  2. 1.3mm 1 item
  3. 1.5mm 3 items
  4. 2mm 4 items
  5. 2.5mm 4 items
  6. 3mm 4 items
  7. 4mm 4 items
  8. 5mm 4 items
  9. 6mm 4 items
  10. 8mm 4 items
  11. 10mm 5 items
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