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Anyone who has reassembled a laptop, repaired a tablet, or built a custom electronics enclosure knows the frustration of a screw head that protrudes above the surface — catching on cables, preventing panel alignment, or simply looking unfinished. These Phillips flat head machine screws are designed specifically for applications where a flush, countersunk fit is non-negotiable, making them a go-to choice for electronics technicians, repair professionals, and precision DIY builders.
Each screw features a countersunk flat head profile with a Phillips cross drive, available in four metric thread diameters — M2, M2.5, M3, and M4 — and lengths ranging from 3mm (≈1/8") to 16mm (≈5/8"). The black zinc plating delivers a uniform dark finish with moderate corrosion resistance. Order in quantities from 10 to 1,000 pieces to match your project scale, from a single repair to a production run.
Typical use cases include laptop chassis reassembly, SSD and PCB bracket mounting, custom aluminum enclosures, 3D-printed project boxes with heat-set inserts, and light-duty mechanical assemblies where a recessed fastener head is required. The ISO metric thread profile ensures compatibility with standard metric tapped holes and threaded inserts across a wide range of consumer electronics and industrial equipment.
| Drive Type | Phillips (Cross Recess) |
|---|---|
| Head Style | Flat / Countersunk |
| Thread Standard | ISO Metric (M2, M2.5, M3, M4) |
| Available Lengths | 3mm (≈1/8"), 4mm (≈5/32"), 5mm (≈3/16"), 6mm (≈1/4"), 8mm (≈5/16"), 10mm (≈3/8"), 12mm (≈1/2"), 16mm (≈5/8") |
| Material | Carbon Steel |
| Surface Finish | Black Zinc Plating |
| Countersink Angle | See variant options |
| Thread Pitch | See variant options (ISO standard pitch per diameter) |
| Recommended Driver Bit | PH0 (M2–M2.5) / PH1 (M3–M4) |
| Pack Quantities | 10, 20, 50, 100, 200, 500, 1000 Pcs |
| Corrosion Resistance | Moderate (indoor / light-duty use) |
| Compatible Applications | Laptops, electronics enclosures, PCB brackets, 3D-printed parts, light mechanical assemblies |
A general rule is to select a length equal to the thickness of the material being fastened plus the depth of the threaded hole or nut. For laptop and electronics assemblies, lengths of 3–6mm (≈1/8"–1/4") are typically used for thin panels, while 8–12mm (≈5/16"–1/2") suit thicker chassis or stacked layers. Always confirm the thread engagement depth before ordering.
These screws are generally made from carbon steel with a black zinc plating applied for corrosion resistance and a uniform dark finish. The zinc coating also provides mild lubricity, which helps with consistent torque during installation.
Black zinc-plated screws offer moderate corrosion resistance suitable for indoor and light-duty applications. For prolonged outdoor or high-humidity exposure, stainless steel fasteners are generally recommended. These screws are best suited for electronics, laptop chassis, and indoor mechanical assemblies.
These screws follow the ISO metric thread standard (M2, M2.5, M3, M4). They are compatible with standard metric nuts, threaded inserts, and tapped holes machined to ISO 68-1 tolerances. They are not compatible with UNC/UNF inch-standard threads.
These screws use a Phillips (cross-head) drive. For M2–M2.5, a PH0 bit is typically required. For M3–M4, a PH1 bit is generally the correct fit. Using the correct bit size helps prevent cam-out and head damage, especially on small-diameter screws.
Yes. These flat head machine screws are commonly used with brass or stainless heat-set inserts in plastic enclosures and 3D-printed parts. The countersunk head sits flush with the surface, making them ideal for applications where a smooth, recessed finish is required.
Load capacity depends on the thread diameter, length of engagement, and base material. In general, M3 and M4 screws in steel or aluminum provide sufficient clamping force for most electronics and light mechanical assemblies. For structural or high-load applications, consult a fastener load chart or contact us to confirm suitability.
