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Stripped screw heads, pulled-through panels, and mismatched hardware finishes are frustrating setbacks on any build. These black zinc pan head machine screws with integrated washers are designed for makers, fabricators, and DIYers who need a reliable, consistent fastener that looks as good as it performs. The matte black finish blends seamlessly into dark enclosures, furniture frames, and electronics builds where silver hardware would stand out.
Each screw features a pan head with an integrated washer flange for improved load distribution, machined from carbon steel with a black zinc passivation coating for corrosion resistance. The drive recess accepts both Pozi (Pozidriv) and Phillips drivers, giving you flexibility with whatever bits you have on hand. Sizes span M2 through M6, with lengths from 5mm (≈3/16") to 50mm (≈2") depending on diameter, available in packs of 5, 10, 25, 50, or 100 pieces so you can order exactly what your project requires.
These black machine screws with washers are a go-to choice for electronics enclosures, PC case modding, furniture assembly, cabinetry hardware, and general mechanical builds where a clean black aesthetic is required. The ISO metric coarse thread ensures compatibility with standard metric nuts, threaded inserts, and tapped holes across all M2–M6 designations.
| Material | Carbon Steel with Black Zinc Passivation Coating |
|---|---|
| Head Style | Pan Head with Integrated Washer Flange |
| Drive Type | Pozi (Pozidriv) / Phillips Cross Recess — dual compatible |
| Thread Standard | ISO Metric Coarse Thread |
| Diameter Range | M2, M2.5, M3, M4, M5, M6 |
| Length Range | 5mm (≈3/16") to 50mm (≈2") — varies by diameter |
| Finish | Black Zinc Passivation (matte black) |
| Property Class | See variant options / Contact us to confirm |
| Driver Bit Size | PZ1/PH1 (M2–M3), PZ2/PH2 (M4–M5), PZ3/PH3 (M6) — typically |
| Pack Quantity | 5, 10, 25, 50, or 100 pieces (select above) |
| Compatibility | Standard metric nuts, threaded inserts, tapped holes M2–M6 |
| Recommended Use | Electronics, furniture, cabinetry, PC builds, general mechanical assembly |
A general rule is that the screw should engage the base material by at least 2–3 times the screw diameter. For example, an M4 screw typically needs 8–12mm of thread engagement in the base material. Measure your material thickness, account for the pan head height (which sits above the surface), and select the next available length up. For reference, lengths in this range run from 5mm (≈3/16") to 50mm (≈2") depending on the diameter selected.
Both Pozi (Pozidriv) and Phillips are cross-shaped recessed drives, but Pozi has additional radial lines between the main slots that provide better driver engagement and significantly reduce cam-out under torque. In most cases, a Phillips screwdriver can be used in a Pozi head, but a Pozi driver is recommended for best results and to avoid stripping the recess — especially at higher torque. If you have both available, use the Pozi driver.
Black zinc plating (black zinc passivation) applies a thin zinc layer over the carbon steel substrate, providing a degree of corrosion resistance and a uniform matte black finish. It generally performs well in dry indoor environments and resists light moisture. The coating is not as corrosion-resistant as stainless steel or hot-dip galvanizing, so for prolonged outdoor or high-humidity exposure, additional protection or a different material is typically recommended.
Black zinc coated screws are generally suitable for light outdoor use in sheltered or low-moisture environments — for example, under a covered porch or inside an outdoor enclosure. For direct exposure to rain, salt air, or standing water, a stainless steel (A2 or A4) or hot-dip galvanized fastener is typically a better long-term choice. If the black finish is required outdoors, applying a clear sealant over the installed screws can help extend service life.
In most standard applications, no — the integrated washer flange under the pan head distributes the clamping load over a larger surface area, reducing pull-through risk in softer materials like wood, plastic, and thin sheet metal. For very soft substrates or thin materials where pull-through is a concern, an additional flat washer may still be beneficial. For hard materials like steel or aluminum, the integrated washer is generally sufficient.
Yes. These screws use standard ISO metric coarse thread, which is the most common thread standard for metric fasteners. They are compatible with standard metric hex nuts, nylon lock nuts, heat-set threaded inserts, and tapped holes of the same M-size designation. Typical thread pitches: M2×0.4, M2.5×0.45, M3×0.5, M4×0.7, M5×0.8, M6×1.0.
These are carbon steel machine screws, typically rated to property class 4.8 or 8.8 depending on the specific production batch. They are well-suited for general mechanical assembly, electronics enclosures, furniture, and light structural applications. For safety-critical or high-load structural use, verify the property class with us before ordering and consult a qualified engineer to confirm suitability.
The correct bit size generally corresponds to the screw diameter as follows (typical values — verify with your specific fastener):
Always use the correct size bit to avoid stripping the recess. A Pozi driver is recommended over Phillips for best engagement.
