⚫ Product Overview: Black Nylon Phillips Flat Head Countersunk Machine Screws – M2 to M8 (PA66)
When you need a non‑conductive, lightweight fastener that sits completely flush with the surface, these black nylon Phillips countersunk flat head machine screws are an excellent choice. Made from high‑strength PA66 nylon, they offer excellent electrical insulation, corrosion resistance, and a dark, professional appearance that blends with black equipment and enclosures. The 90° flat head sinks perfectly into countersunk holes, leaving a smooth, snag‑free finish. Fully threaded with standard coarse metric pitch, available in diameters M2, M2.5, M3, M4, M5, M6, and M8. Length is measured including the head (total screw length). Perfect for electronics, medical devices, marine equipment, and any application where metal screws would cause shorts or rust.
✨ Why Choose Black Nylon Countersunk Phillips Screws
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Black PA66 nylon construction – Non‑conductive, corrosion‑proof, and lightweight. Dark color blends with black panels, enclosures, and equipment.
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Phillips countersunk flat head (90°) – Sits flush in tapered holes for a smooth, snag‑free, professional finish. Ideal for flush panel mounting.
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Excellent electrical insulation – Prevents short circuits in electronics, battery compartments, and high‑voltage environments.
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Chemical resistant – Resists weak acids, weak alkalis, neutral oils, and many solvents. Suitable for industrial and marine use.
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Wide metric range: M2, M2.5, M3, M4, M5, M6, M8 – Covers everything from tiny electronics to medium‑duty machinery and furniture.
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Fully threaded, coarse metric pitch – Standard threads per size. Threads run the entire length for maximum grip.
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Length measured including head – Total screw length from top of flat head to tip – easy to match with existing countersunk holes.
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Wide application range – Electronics, medical devices, marine equipment, automotive interiors, furniture, and general DIY.
📏 Technical Specifications – Black Nylon Countersunk Screws (M2–M8)
| Screw Size (d) |
Thread Pitch (p) |
Head Style |
Drive Style |
Length Measurement |
| M2 |
0.4mm |
Countersunk flat (90°) |
Phillips |
Length includes head |
| M2.5 |
0.45mm |
Countersunk flat (90°) |
Phillips |
Length includes head |
| M3 |
0.5mm |
Countersunk flat (90°) |
Phillips |
Length includes head |
| M4 |
0.7mm |
Countersunk flat (90°) |
Phillips |
Length includes head |
| M5 |
0.8mm |
Countersunk flat (90°) |
Phillips |
Length includes head |
| M6 |
1.0mm |
Countersunk flat (90°) |
Phillips |
Length includes head |
| M8 |
1.25mm |
Countersunk flat (90°) |
Phillips |
Length includes head |
| Specification |
Details |
| Product Type |
Black Nylon Phillips Countersunk Flat Head Machine Screws |
| Material |
Nylon PA66 (engineering plastic) |
| Color |
Black |
| Drive Style |
Phillips cross‑head (use PH0 for M2–M2.5, PH1 for M3–M5, PH2 for M6–M8) |
| Head Style |
Countersunk flat head (90°) |
| Thread Type |
Fully threaded, coarse metric pitch |
| Length Measurement |
Length includes head (total screw length from top of flat head to tip) |
| Length Options |
Select from product options (typical ranges: 4–50mm depending on size) |
| Temperature Range |
-40°C to 120°C (-40°F to 248°F) |
| Key Properties |
Electrical insulation, corrosion proof, lightweight, chemical resistant |
❓ FAQs – Black Nylon Countersunk Screws
🔸 Are these screws electrically insulating?
Yes – nylon is an excellent electrical insulator. These black nylon screws are non‑conductive, making them ideal for securing circuit boards, battery terminals, and components in sensitive electronics where metal screws could cause shorts.
🔸 How is length measured for countersunk nylon screws?
For countersunk screws, length is measured as total screw length including the head – from the top of the flat head to the tip. For example, an M4 x 12mm screw is 12mm long overall. This matches standard countersunk fastener measurement.
🔸 Will nylon screws degrade in sunlight or outdoor use?
Standard PA66 nylon is UV‑sensitive and can become brittle with prolonged direct sunlight. For outdoor use, try to keep them shaded or painted. They handle temperatures up to about 120°C (248°F) before softening. For extreme UV exposure, consider UV‑stabilized nylon (available by request).
🔸 How strong are nylon screws compared to metal?
Nylon screws are strong for plastic fasteners but not as strong as steel. Use them for non‑critical fastening: PCB mounting, battery covers, plastic enclosures, light machinery, and marine electronics where corrosion or conductivity is a concern. For load‑bearing or high‑torque applications, metal fasteners are recommended.
🔸 Can I use these screws with nuts, or are they self‑tapping?
These are standard machine screws – they require a matching metric nut (M2–M8) or a pre‑tapped hole. They are not self‑tapping. For best results, use nylon nuts (recommended) or stainless steel nuts.
🔸 What Phillips screwdriver size works for M2 through M8?
M2–M2.5: use PH00 or PH0. M3–M5: use PH1. M6–M8: use PH2. Using the correct size prevents stripping – nylon is softer than metal, so don't overtighten.
