⚪ Product Overview: Nylon Phillips Countersunk Machine Screws (M2.5–M8)
Metal screws are great until you need something non‑conductive, corrosion‑proof, or lightweight. These white (or black) nylon Phillips countersunk machine screws are the answer. Made from high‑quality engineering plastic, they won’t rust, won’t short out electronics, and won’t add unnecessary weight. Available in M2.5, M3, M4, M5, M6, and M8 metric diameters with lengths from 5mm to 40mm (measured including the head), they’re perfect for PCB standoffs, battery compartments, outdoor equipment, marine DIY, and any application where metal fasteners would cause problems. The Phillips flat head sinks flush for a clean, professional finish.
✨ Why Nylon Countersunk Screws Are a Smart Alternative to Metal
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Non‑conductive electrical insulation – Perfect for electronics, circuit boards, and battery housings. No risk of short circuits or grounding issues.
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100% corrosion proof – Unlike steel or even stainless, nylon never rusts. Ideal for humid environments, outdoor use, marine applications, and chemical exposure.
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Lightweight and tough – High tensile and compressive strength for a plastic fastener. Non‑toxic, odorless, antibacterial, and mold‑resistant.
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Phillips flat countersunk head – Sits flush with the surface. No snagging, smooth finish. Works with standard Phillips screwdrivers.
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Metric sizes M2.5, M3, M4, M5, M6, M8 – Covers the most common diameters for small appliances, communication equipment, furniture, and hobby projects.
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Lengths 5mm–40mm (including head) – Short screws for thin panels, longer ones for through‑hole applications. Choose from multiple length options.
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Available in white or black – Match your device or project aesthetic. White for clean, medical‑style looks; black for stealth or dark enclosures.
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Grade 4.8 strength equivalent – Strong enough for most non‑structural fastening in plastics, wood, and light metal assemblies.
📏 Technical Specifications – Nylon Countersunk Phillips Screws
| Specification |
Details |
| Product Type |
Nylon Phillips Countersunk (Flat Head) Machine Screws |
| Material |
High‑quality nylon (engineering plastic) |
| Color Options |
White or Black (select when ordering) |
| Drive Style |
Phillips cross‑head |
| Head Style |
Flat / Countersunk (82° typical) |
| System of Measurement |
Metric |
| Thread Sizes (Diameter) |
M2.5, M3, M4, M5, M6, M8 |
| Thread Pitch |
M2.5x0.45, M3x0.5, M4x0.7, M5x0.8, M6x1.0, M8x1.25 |
| Thread Type |
Fully threaded (full length) |
| Length Range |
5mm to 40mm (length includes the head – total screw length) |
| Grade |
4.8 (comparable strength) |
| MPN / Model |
Does not apply / Phillips Machine Screws |
❓ FAQs – Nylon Phillips Countersunk Screws
🔸 Are nylon screws strong enough for structural use?
Nylon screws are strong for plastic fasteners but not as strong as steel. They're rated roughly Grade 4.8 (similar to mild steel in tensile strength for their size). Use them for non‑critical fastening: PCB mounting, battery covers, plastic enclosures, light furniture assembly, and outdoor gear where corrosion is a concern. For load‑bearing or high‑torque applications, stick with metal.
🔸 Will nylon screws degrade in sunlight or heat?
Standard 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 80–100°C (176–212°F) before softening. For extreme UV or high‑heat environments, look for specialty UV‑stabilized or high‑temp nylon.
🔸 Can I use these screws with nuts, or are they self‑tapping?
These are machine screws – they require a matching metric nut (e.g., M3 nylon or metal nut) or a pre‑tapped hole. They are not self‑tapping. For plastic assemblies, you can also thread them directly into a slightly undersized pilot hole in soft plastic (the screw will cut its own threads).
🔸 Are these screws electrically insulating?
Yes – nylon is an excellent electrical insulator. They are non‑conductive, making them ideal for securing circuit boards, preventing shorts, or isolating components from metal chassis. Perfect for DIY electronics, battery boxes, and control panels.
🔸 How is length measured for countersunk nylon screws?
Length includes the head – total screw length from the top of the flat head to the tip. For example, an M4 x 10mm screw is 10mm long overall. This matches standard countersunk measurement conventions.
🔸 What Phillips screwdriver size works for M2.5 through M8?
M2.5 and M3: use PH0 or PH1 (PH0 is safer). M4 and M5: use PH1. M6 and M8: use PH2. Nylon is softer than metal, so don't overtighten – use light torque to avoid stripping the recess.
🔸 Are these screws food‑safe or medical‑grade?
The nylon used is non‑toxic, odorless, and mold‑resistant. While not certified medical‑grade, they are suitable for many food contact and general hygiene applications (like appliance repair or kitchen equipment). For certified medical or food‑grade use, check specific certifications.
