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Machine Screws

Machine Screws

Security Machine Screws

246 stocked SKUs covering the standard security-machine-screw range: Pan and Button head for surface-flush install on enclosures and signage, Countersunk head for flush install on panels and access covers. All in stainless A2-70 G304 with Pin Torx, Tri-Wing, Spanner or Snake-Eye drives matched to the security level of the application.

Sizes & Drives

Sizes: M3, M4, M5, M6, M8, M10. Lengths: 6mm through 50mm. Drives: Pin Torx (T15, T20, T25, T27, T30), Tri-Wing (#1, #2, #3), Spanner (#6, #8, #10), Snake-Eye. Thread: Metric Coarse standard; UNC / BSW Coarse stocked on selected sizes for retrofit work. Finish: Stainless A2-70 G304 across the range.

Recommended Use

Pin Torx and Tri-Wing for general security applications - electrical enclosures, public seating, transport infrastructure, retail signage. Spanner and Snake-Eye for higher-security applications where tampering history is known. Always supply matching bits from the Security Bits sub-cat - the screw is useless without the only tool that fits it.

Browse the full BNA range at Security Fasteners or see our Technical PDFs library for matching-bit guides and spec sheets.

Why Australia Trusts Bolt & Nut

98.75% of orders ship the same business day when placed before 1pm AEST. We've been online since 2011, carry 25,000 stock lines and over 200 million pieces ex-stock in Brisbane QLD, and offer up to 13 price breaks plus 3 spend-tier discounts. See our verified customer reviews on REVIEWS.io.

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    Countersunk Head
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    Pan & Button Head
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28 Items found

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  1. Free shipping

    In stock

    M3 x 0.50p Metric Coarse Stainless A2-70 G304 Button Post Torx (T10) Security Machine Screws
    M3 x 0.50p Metric Coarse Stainless A2-70 G304 Button Post Torx (T10) Security Machine Screws
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  2. Free shipping

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    M3 x 0.50p Metric Coarse Stainless A2-70 G304 Countersunk Post Torx (T10) Security Machine Screws
    M3 x 0.50p Metric Coarse Stainless A2-70 G304 Countersunk Post Torx (T10) Security Machine Screws
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    M4 x 0.70p Metric Coarse Stainless A2-70 G304 Button Post Torx (T20) Security Machine Screws
    M4 x 0.70p Metric Coarse Stainless A2-70 G304 Button Post Torx (T20) Security Machine Screws
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    M4 x 0.70p Metric Coarse Stainless A2-70 G304 Button Post Hex (2.5mm) Security Machine Screws
    M4 x 0.70p Metric Coarse Stainless A2-70 G304 Button Post Hex (2.5mm) Security Machine Screws
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    M4 x 0.70p Metric Coarse Stainless A2-70 G304 Countersunk Post Torx (T20) Security Machine Screws
    M4 x 0.70p Metric Coarse Stainless A2-70 G304 Countersunk Post Torx (T20) Security Machine Screws
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    M4 x 0.70p Metric Coarse Stainless A2-70 G304 Countersunk Eye Drive (#8) Security Machine Screws
    M4 x 0.70p Metric Coarse Stainless A2-70 G304 Countersunk Eye Drive (#8) Security Machine Screws
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  7. Free shipping

    In stock

    M4 x 0.70p Metric Coarse Stainless A2-70 G304 Countersunk Post Hex (2.5mm) Security Machine Screws
    M4 x 0.70p Metric Coarse Stainless A2-70 G304 Countersunk Post Hex (2.5mm) Security Machine Screws
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  8. Free shipping

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    M4 x 0.70p Metric Coarse Stainless A2-70 G304 Pan Eye Drive (#8) Security Machine Screws
    M4 x 0.70p Metric Coarse Stainless A2-70 G304 Pan Eye Drive (#8) Security Machine Screws
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  9. Free shipping

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    M5 x 0.80p Metric Coarse Stainless A2-70 G304 Button Post Torx (T25) Security Machine Screws
    M5 x 0.80p Metric Coarse Stainless A2-70 G304 Button Post Torx (T25) Security Machine Screws
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  10. Free shipping

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    M5 x 0.80p Metric Coarse Stainless A2-70 G304 Button Post Hex (3mm) Security Machine Screws
    M5 x 0.80p Metric Coarse Stainless A2-70 G304 Button Post Hex (3mm) Security Machine Screws
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  11. Free shipping

    In stock

    M5 x 0.80p Metric Coarse Stainless A2-70 G304 Countersunk Post Torx (T25) Security Machine Screws
    M5 x 0.80p Metric Coarse Stainless A2-70 G304 Countersunk Post Torx (T25) Security Machine Screws
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  12. Free shipping

    In stock

    M5 x 0.80p Metric Coarse Stainless A2-70 G304 Countersunk Eye Drive (#10) Security Machine Screws
    M5 x 0.80p Metric Coarse Stainless A2-70 G304 Countersunk Eye Drive (#10) Security Machine Screws
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  13. Free shipping

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    M5 x 0.80p Metric Coarse Stainless A2-70 G304 Countersunk Post Hex (3mm) Security Machine Screws
    M5 x 0.80p Metric Coarse Stainless A2-70 G304 Countersunk Post Hex (3mm) Security Machine Screws
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  14. Free shipping

    In stock

    M5 x 0.80p Metric Coarse Stainless A2-70 G304 Pan Eye Drive (#12) Security Machine Screws
    M5 x 0.80p Metric Coarse Stainless A2-70 G304 Pan Eye Drive (#12) Security Machine Screws
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  15. Free shipping

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    M6 x 1.00p Metric Coarse Stainless A2-70 G304 Button Post Torx (T30) Security Machine Screws
    M6 x 1.00p Metric Coarse Stainless A2-70 G304 Button Post Torx (T30) Security Machine Screws
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    M6 x 1.00p Metric Coarse Stainless A2-70 G304 Button Post Hex (4mm) Security Machine Screws
    M6 x 1.00p Metric Coarse Stainless A2-70 G304 Button Post Hex (4mm) Security Machine Screws
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  17. Free shipping

    In stock

    M6 x 1.00p Metric Coarse Stainless A2-70 G304 Countersunk Post Torx (T30) Security Machine Screws
    M6 x 1.00p Metric Coarse Stainless A2-70 G304 Countersunk Post Torx (T30) Security Machine Screws
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  18. Free shipping

    In stock

    M6 x 1.00p Metric Coarse Stainless A2-70 G304 Countersunk Eye Drive (#12) Security Machine Screws
    M6 x 1.00p Metric Coarse Stainless A2-70 G304 Countersunk Eye Drive (#12) Security Machine Screws
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  19. Free shipping

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    M6 x 1.00p Metric Coarse Stainless A2-70 G304 Countersunk Post Hex (4mm) Security Machine Screws
    M6 x 1.00p Metric Coarse Stainless A2-70 G304 Countersunk Post Hex (4mm) Security Machine Screws
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    M6 x 1.00p Metric Coarse Stainless A2-70 G304 Pan Eye Drive (#14) Security Machine Screws
    M6 x 1.00p Metric Coarse Stainless A2-70 G304 Pan Eye Drive (#14) Security Machine Screws
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    M8 x 1.25p Metric Coarse Stainless A2-70 G304 Button Post Torx (T40) Security Machine Screws
    M8 x 1.25p Metric Coarse Stainless A2-70 G304 Button Post Torx (T40) Security Machine Screws
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  22. Free shipping

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    M8 x 1.25p Metric Coarse Stainless A2-70 G304 Button Post Hex (5mm) Security Machine Screws
    M8 x 1.25p Metric Coarse Stainless A2-70 G304 Button Post Hex (5mm) Security Machine Screws
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  23. Free shipping

    In stock

    M8 x 1.25p Metric Coarse Stainless A2-70 G304 Countersunk Post Torx (T40) Security Machine Screws
    M8 x 1.25p Metric Coarse Stainless A2-70 G304 Countersunk Post Torx (T40) Security Machine Screws
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    M8 x 1.25p Metric Coarse Stainless A2-70 G304 Countersunk Post Hex (5mm) Security Machine Screws
    M8 x 1.25p Metric Coarse Stainless A2-70 G304 Countersunk Post Hex (5mm) Security Machine Screws
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    M10 x 1.50p Metric Coarse Stainless A2-70 G304 Button Post Torx (T45) Security Machine Screws
    M10 x 1.50p Metric Coarse Stainless A2-70 G304 Button Post Torx (T45) Security Machine Screws
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  28. Free shipping

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    3/8" x 16 TPI UNC Coarse Stainless A2-70 G304 Button Post Torx (T45) Security Machine Screws
    3/8" x 16 TPI UNC Coarse Stainless A2-70 G304 Button Post Torx (T45) Security Machine Screws
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per page

Security machine screws - pan, button, csk heads with tamper-resistant drives in stainless.

TECHNICAL RESOURCES

Need help identifying your fastener? See our guide to identifying the size.

For the full library, see our Technical PDFs library.

Filter by :
Filter By
Category
System of Measurement
  1. Metric 27 items
  2. Imperial 1 item
Size
  1. M3 (3mm) 2 items
  2. M4 (4mm) 6 items
  3. M5 (5mm) 6 items
  4. M6 (6mm) 6 items
  5. M8 (8mm) 4 items
  6. M10 (10mm) 2 items
  7. M12 (12mm) 1 item
  8. 3/8" 1 item
Size & Thread Pitch
  1. M3 x 0.50p Coarse 2 items
  2. M4 x 0.70p Coarse 6 items
  3. M5 x 0.80p Coarse 6 items
  4. M6 x 1.00p Coarse 6 items
  5. M8 x 1.25p Coarse 4 items
  6. M10 x 1.50p Coarse 2 items
  7. M12 x 1.75p Coarse 1 item
  8. 3/8" x 16 TPI UNC 1 item
Thread Type
  1. Metric - Coarse 27 items
  2. UNC / BSW - Coarse 1 item
Length
  1. 6mm 5 items
  2. 8mm 9 items
  3. 10mm 17 items
  4. 12mm 21 items
  5. 16mm 24 items
  6. 20mm 27 items
  7. 25mm 25 items
  8. 30mm 22 items
  9. 35mm 7 items
  10. 40mm 17 items
  11. 45mm 3 items
  12. 50mm 12 items
  13. 60mm 8 items
  14. 65mm 1 item
  15. 70mm 3 items
  16. 80mm 4 items
  17. 5/8" 1 item
  18. 3/4" 1 item
  19. 1" 1 item
  20. 1-1/4" 1 item
  21. 1-3/8" 1 item
  22. 1-1/2" 1 item
  23. 1-3/4" 1 item
  24. 2" 1 item
  25. 2-1/4" 1 item
  26. 3-1/4" 1 item
Material / Finish
  1. Stainless Steel 28 items
Class / Grade
  1. A2-70 G304 28 items
Corrosion Protection Level
  1. Excellent 28 items
Head Type
  1. Button Head 12 items
  2. Countersunk Head 13 items
  3. Pan Head 3 items
Head Diameter Range
  1. 5.10 - 5.70mm 1 item
  2. 5.50 - 6.40mm 1 item
  3. 7.00 - 8.00mm 3 items
  4. 7.24 - 7.93mm 2 items
  5. 7.60 - 8.20mm 1 item
  6. 8.00 - 9.20mm 1 item
  7. 8.82 - 9.50mm 2 items
  8. 9.00 - 10.45mm 2 items
  9. 9.60 - 10.00mm 1 item
  10. 10.07 - 10.50mm 2 items
  11. 10.40 - 12.00mm 3 items
  12. 11.50 - 12.00mm 1 item
  13. 13.39 - 14.00mm 2 items
  14. 14.00 - 16.00mm 2 items
  15. 15.20 - 16.70mm 1 item
  16. 17.00 - 18.00mm 1 item
  17. 18.20 - 21.45mm 1 item
  18. 20.48 - 21.00mm 1 item
Drive Type
  1. Eye Drive / Snake Eye 6 items
  2. Post (Pin) Hex 8 items
  3. Post (Pin) Torx 14 items
Drive Size
  1. 2.5mm 2 items
  2. 3mm 2 items
  3. 4mm 2 items
  4. 5mm 2 items
  5. T10 2 items
  6. T20 2 items
  7. T25 2 items
  8. T30 2 items
  9. T40 2 items
  10. T45 3 items
  11. T55 1 item
  12. #8 2 items
  13. #10 1 item
  14. #12 2 items
  15. #14 1 item
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