Nylon Phillips Countersunk Machine Screws — Non-Conductive Flat Head for Electronics and Lightweight Assemblies
When a metal screw near a circuit board is one slip away from a short circuit, or when you need a fastener that simply won't rust, corrode, or interfere with sensitive electronics, nylon is the right call. These nylon Phillips countersunk machine screws are built for electronics builders, PCB assemblers, RC hobbyists, and DIYers who need a lightweight, non-conductive flat-head fastener that sits flush with the surface and stays out of the way electrically and magnetically.
Each pack contains Phillips countersunk (flat head) machine screws molded from nylon, available in M2.5, M3, and M4 diameters in your choice of white nylon or black nylon. Lengths range from 5mm (≈3/16") to 30mm (≈1-3/16"), with pack quantities of 10, 50, or 100 pieces. The countersunk head sits flush with or below the surface when installed in a properly countersunk hole, providing a clean, snag-free finish. Drive is Phillips (cross-head), compatible with standard PH1 and PH2 bits.
These nylon countersunk screws are a go-to choice for PCB standoff and panel mounting in electronics enclosures where metal fasteners could cause short circuits or galvanic corrosion, for RC car chassis and drone frame assembly where reducing weight and eliminating magnetic interference matters, and for food-processing equipment, aquarium hardware, and chemical-exposure environments where corrosion-proof fasteners are required. The color options — white and black — let you match the fastener to the assembly for a cleaner finished look.
🔩 Compatibility: ISO metric coarse-pitch threads — fits standard metric nuts, nylon hex nuts, and tapped holes (M2.5, M3, M4). Phillips drive: PH1 for M2.5–M3, PH2 for M4 (typically). These are machine screws — not self-tapping. A pre-tapped hole, nut, or threaded insert is required.
✅ Key Features of These Nylon Phillips Countersunk Machine Screws
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⚡Fully Non-Conductive — Nylon is an electrical insulator, making these screws safe for PCB mounting, electronics enclosures, and any assembly where metal fasteners could cause short circuits or electromagnetic interference.
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🦀Corrosion-Proof Material — Nylon does not rust, oxidize, or react with most mild acids and chemicals, making these non-conductive flat head screws a reliable choice for damp, humid, or lightly corrosive environments.
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⚖️Lightweight — Fraction of Metal Weight — Nylon screws weigh significantly less than equivalent steel or stainless fasteners, helping reduce overall assembly weight in weight-sensitive applications like drones, RC vehicles, and portable electronics.
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🔽Flush-Sitting Countersunk Head — The flat countersunk head sits flush with or below the surface when installed in a properly countersunk hole, eliminating snag points and providing a clean, finished appearance in panel and enclosure assemblies.
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🎨White and Black Color Options — Choose white nylon for food-processing, medical, or light-colored assemblies, or black nylon for electronics, audio equipment, and dark enclosures where a low-visibility fastener is preferred.
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📦Flexible Pack Quantities — 10, 50, or 100 Pieces — Order exactly what your project needs. Smaller 10-piece packs are ideal for prototyping and repairs; 50- and 100-piece packs suit production runs and stocking your parts bin.
📐 Technical Specifications — Nylon Phillips Countersunk Machine Screws
| Material |
Nylon (PA66 grade, typically) |
| Color Options |
White Nylon / Black Nylon |
| Drive Type |
Phillips (Cross-Head) |
| Recommended Bit Size |
PH1 for M2.5–M3; PH2 for M4 (typically) |
| Head Style |
Countersunk (Flat Head) — flush-sitting when installed in countersunk hole |
| Length Measurement |
Full length including head (standard for countersunk screws) |
| Thread Standard |
ISO Metric Coarse Pitch (M2.5, M3, M4) |
| Available Lengths |
5mm (≈3/16") to 30mm (≈1-3/16") — see variant options |
| Pack Quantity |
10, 50, or 100 pcs — select above |
| Electrical Properties |
Non-conductive (electrical insulator) |
| Magnetic Properties |
Non-magnetic |
| Corrosion Resistance |
Corrosion-proof; resistant to moisture and mild chemicals |
| Temperature Range |
Generally suitable up to approx. 80–100°C (176–212°F); contact us to confirm for high-heat use |
| Screw Type |
Machine screw (requires pre-tapped hole, nut, or threaded insert) |
⚠️ Torque Note: Nylon is softer than metal — do not over-tighten. Use a correctly sized Phillips bit and apply moderate, controlled torque to avoid stripping the drive recess or cracking the head. Hand-tightening is sufficient for most light-duty applications.
❓ Frequently Asked Questions
What is the difference between nylon screws and stainless steel screws?
Nylon screws are non-conductive, non-magnetic, and fully corrosion-proof, making them the right choice for electronics assemblies, PCB mounting, and environments where metal fasteners could cause short circuits or galvanic corrosion. Stainless steel screws offer higher tensile strength and are better suited for structural or load-bearing applications. For lightweight, electrically sensitive, or chemically exposed assemblies, nylon is generally the preferred material.
How do I choose the right length for a countersunk nylon screw?
For countersunk (flat head) screws, the stated length includes the head — the full screw length from the top of the head to the tip. Measure the total thickness of the material being fastened, then add the thread engagement depth needed in the base material (typically at least 1.5× the screw diameter). For example, an M3 screw through a 2mm panel into a tapped hole generally needs at least 8–10mm total length. Available lengths in this listing range from 5mm (≈3/16") to 30mm (≈1-3/16").
Are nylon screws suitable for outdoor or wet environments?
Yes, nylon is generally resistant to moisture, mild acids, and many common chemicals, making these screws suitable for damp or lightly corrosive environments. However, nylon can degrade under prolonged UV exposure and is not recommended for high-temperature applications (typically above 80–100°C / 176–212°F). For harsh outdoor or high-heat environments, contact us to confirm suitability.
What thread standard do these nylon machine screws use — are they compatible with standard metric nuts?
These are ISO metric machine screws with standard coarse-pitch threads (M2.5, M3, M4). They are compatible with standard metric nuts, nylon hex nuts, threaded inserts, and tapped holes of the corresponding size. They are not compatible with UNC or UNF inch-standard threads used in some American hardware.
What screwdriver or bit do I need for these Phillips countersunk nylon screws?
These screws use a Phillips (cross-head) drive. For M2.5–M3, a PH1 (Phillips #1) bit is generally appropriate. For M4, a PH2 (Phillips #2) bit is typically used. Because nylon is softer than metal, always use a correctly sized bit and apply moderate torque to avoid stripping the drive recess — nylon screws should not be over-tightened.
How strong are nylon screws — can they hold a load?
Nylon screws are generally suitable for light-duty fastening applications such as PCB mounting, electronics enclosures, panel assembly, and hobby projects. They are not designed for structural or high-load applications where metal fasteners are required. Tensile strength varies by size and nylon grade; contact us to confirm load suitability for your specific application.
What is the difference between white nylon and black nylon screws?
Both white and black variants are made from the same nylon material and have identical mechanical properties. The color difference is purely aesthetic. Black nylon screws are commonly used in electronics, audio equipment, and dark-colored enclosures where a low-visibility fastener is preferred. White nylon screws are often used in food-processing equipment, medical devices, and light-colored assemblies.
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