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When you're assembling a PCB enclosure, mounting a control panel in a damp environment, or building a project where a stray metal fastener could cause a short circuit, standard steel screws simply aren't the right tool. These black nylon Phillips flat head machine screws are engineered for exactly those situations — delivering reliable fastening without conductivity, rust, or added weight.
Made from durable nylon (PA) polymer, each screw features a countersunk flat head profile that sits flush with the surface when installed in a matching countersunk hole. The Phillips cross drive is compatible with standard PH1 and PH2 screwdrivers, and the ISO metric thread standard ensures compatibility with standard metric nuts, threaded inserts, and tapped holes. Thread diameters span M2.5 through M6, with lengths from 5mm to 40mm and pack sizes from 5 to 100 pieces.
Common applications include PCB and electronics enclosure assembly, electrical panel fastening, food processing equipment, chemical-resistant fixtures, RC vehicle body panels, and any project where a non-metallic, corrosion-resistant fastener is required.
| Material | Nylon (PA — Polyamide) |
|---|---|
| Color | Black |
| Drive Type | Phillips (Cross / PH) |
| Head Style | Flat Head (Countersunk) |
| Thread Standard | ISO Metric |
| Thread Diameters | M2.5, M3, M4, M5, M6 |
| Available Lengths | 5mm, 6mm, 8mm, 10mm, 12mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm |
| Quantity Options | 5, 10, 20, 30, 50, 100 Pcs |
| Electrical Properties | Non-conductive (insulating) |
| Corrosion Resistance | Excellent (does not rust) |
| Temperature Range | Approx. -40°C to +85°C (standard nylon) |
| Recommended Driver | PH1 (M2.5–M3); PH2 (M4–M6) |
| Thread Pitch | See variant options |
| Head Diameter | See variant options |
| Countersink Angle | Contact us to confirm |
Nylon machine screws are commonly used in electronics, PCB assemblies, electrical enclosures, and any application where non-conductive, lightweight, or corrosion-resistant fasteners are required. They are also used in food processing equipment and chemical environments where metal fasteners would corrode.
Nylon screws are lighter and less strong than steel screws, but they are sufficient for light-duty fastening applications such as securing PCBs, electronics panels, and plastic enclosures. They should not be used in load-bearing structural applications.
Yes. Nylon is an electrical insulator, making these screws ideal for use in electronics, PCB mounting, and electrical enclosures where metal fasteners could cause short circuits or interference.
These screws follow the ISO metric thread standard (M2.5, M3, M4, M5, M6), compatible with standard metric nuts, threaded inserts, and tapped holes of the corresponding size.
Yes. These screws use a standard Phillips (cross) drive. Use a PH1 driver for M2.5–M3, and a PH2 driver for M4–M6. Avoid over-torquing, as nylon is softer than metal and the head recess can strip if excessive force is applied.
Nylon screws are corrosion-resistant and can be used in damp or mildly outdoor environments. However, prolonged UV exposure can degrade nylon over time. For long-term outdoor applications, UV-stabilized nylon or stainless steel fasteners are generally recommended.
Choose a length that allows the screw to engage at least 1.5× its diameter into the receiving material. For PCB standoff mounting, 5–8mm lengths are most common. For panel fastening, 10–20mm lengths are typical. Always measure the material thickness before selecting.
Standard nylon (PA6/PA66) screws are generally rated for continuous use between approximately -40°C and +85°C (-40°F to +185°F). For higher temperature applications, consider PEEK or other high-performance polymer fasteners.
M2.5 and M3 are typically used in small electronics, PCBs, and compact enclosures. M4 and M5 are common in standard electronics panels, RC vehicles, and light mechanical assemblies. M6 is generally used in heavier enclosures and structural plastic components. If replacing an existing screw, measure the shank diameter with a caliper or match it to the threaded hole size.
