Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Hunting down the right small-diameter screw — and then a matching washer — mid-project is a time sink that slows down electronics builds, RC assembly, and precision instrument work. These black zinc flange Phillips pan head machine screws solve both problems at once: the integrated flange distributes clamping load like a washer, while the uniform matte-black finish keeps your build looking intentional. Available in M1.4 through M6, they cover the full range of metric machine screw sizes most makers and engineers reach for.
Each screw is made from carbon steel with a black zinc dichromate plating and features a pan head with an integrated flange and Phillips drive. Diameters span M1.4 through M6, with lengths from 3mm (≈1/8") to 30mm (≈1-3/16"), and pack options of 10, 50, 100, 200, or 500 pieces. The flange underside seats flat against the workpiece surface, eliminating the need for a separate flat washer and reducing part count in your assembly.
These screws are a staple in electronics enclosure assembly, where M2 and M2.5 flange pan head screws keep PCB mounts secure without separate hardware. RC hobbyists and robotics builders rely on M3 and M4 flange Phillips screws for chassis and frame assembly where vibration resistance and a clean profile matter. They're equally at home in precision instrument housings, automotive interior trim panels, and furniture hardware where a black finish blends with the surrounding material.
| Material | Carbon Steel |
|---|---|
| Finish | Black Zinc Dichromate Plating |
| Head Style | Flange Pan Head (integrated washer flange) |
| Drive Type | Phillips (PH) |
| Thread Type | Metric Coarse |
| Available Diameters | M1.4, M2, M2.5, M3, M4, M5, M6 |
| Available Lengths | 3mm (≈1/8") to 30mm (≈1-3/16") — see variant options |
| Pack Sizes | 10, 50, 100, 200, 500 pieces |
| Tensile Strength | Typically 400–600 MPa (varies by grade) |
| Recommended Driver Bit | PH0 (M1.4–M2) / PH1 (M2.5–M4) / PH2 (M5–M6) |
| Corrosion Resistance | Moderate — suitable for indoor and light-duty use |
| Ships From | US Warehouse |
A general guideline is to select a length that provides at least 1.5–2 times the screw diameter in thread engagement. For example, an M3 screw typically needs at least 4.5–6mm of thread engagement. If fastening two panels, add the top panel thickness to the required engagement depth. Our range covers 3mm (≈1/8") to 30mm (≈1-3/16") to suit most applications.
The integrated flange acts as a built-in washer, distributing the clamping load over a wider area. This reduces the risk of the screw pulling through softer materials, eliminates the need for a separate flat washer, and speeds up assembly — particularly useful in electronics enclosures, RC builds, and robotics where every gram and millimeter counts.
Black zinc plating (also called black zinc dichromate) provides a layer of corrosion resistance over the carbon steel base and gives the screw a uniform matte-black appearance. It is generally suitable for indoor and light-duty applications. For prolonged outdoor or high-humidity exposure, additional protective measures or a different finish — such as stainless steel — may be advisable.
Yes. These are metric coarse thread machine screws, compatible with standard metric nuts, threaded inserts, and tapped holes in the corresponding size (M1.4 through M6). They are not compatible with UNC/UNF imperial threads. Always verify thread pitch compatibility before ordering.
These screws use a Phillips (PH) drive. Smaller sizes like M1.4 and M2 typically use a PH0 bit. M2.5 and M3 generally take a PH1 bit, while M4–M6 typically use a PH1 or PH2 bit. Always use a well-fitting bit to avoid cam-out, especially on the smaller M1.4 and M2 sizes where head damage is more likely with an ill-fitting driver.
Black zinc plating offers moderate corrosion resistance suitable for most indoor environments and light outdoor use. For prolonged outdoor exposure, rain, or high-humidity conditions, a stainless steel or hot-dip galvanized fastener is generally recommended for better long-term performance. Contact us if you need help selecting the right finish for your environment.
Load capacity depends on the screw diameter, length, material being fastened, and installation method. Carbon steel machine screws in this size range typically have a tensile strength of around 400–600 MPa depending on grade. For structural or safety-critical applications, consult an engineer and verify recommended torque specifications for your specific size and application.
For one-off repairs or prototyping, the 10-piece pack is a cost-effective way to get exactly what you need without overstocking. The 50 and 100-piece packs suit small production runs or workshop stock. The 200 and 500-piece packs offer the best per-unit value for ongoing production, bulk assembly, or resale.
