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Whether you're assembling a miniature electronics enclosure, mounting a PCB, building an RC vehicle frame, or stocking a workshop for ongoing light-duty fabrication, finding the right small metric screw in the right finish shouldn't require sourcing from multiple suppliers. These Phillips pan head machine screws give makers, technicians, and hobbyists a single reliable source for carbon steel metric fasteners spanning M1 through M4 in a wide range of lengths and three finish options.
Each pack contains 100 pieces of carbon steel Phillips pan head machine screws. Thread diameters cover M1 (≈0.039"), M1.2 (≈0.047"), M1.4 (≈0.055"), M2 (≈0.079"), M2.5 (≈0.098"), M3 (≈0.118"), and M4 (≈0.157"). Available lengths range from 1.5 mm (≈1/16") up to 70 mm (≈2-3/4"), depending on the size selected. Finish options include Bright Nickel (polished silver), Black Zinc (matte dark), and White Zinc (silver-grey) — select the combination that matches your application and aesthetic requirements.
These small metric pan head screws are a go-to choice for PCB and electronics enclosure assembly, 3D printer and CNC machine hardware, RC car and drone frame construction, and general workshop fabrication where a low-profile above-surface head is needed. The ISO metric thread standard ensures compatibility with standard metric nuts, threaded inserts, and tapped holes across a wide range of DIY and light industrial applications.
| Drive Type | Phillips (Cross / PH) |
|---|---|
| Head Style | Pan Head |
| Thread Diameters | M1 (≈0.039"), M1.2 (≈0.047"), M1.4 (≈0.055"), M2 (≈0.079"), M2.5 (≈0.098"), M3 (≈0.118"), M4 (≈0.157") |
| Thread Standard | ISO Metric Coarse (M1×0.25 through M4×0.7) |
| Available Lengths | 1.5 mm (≈1/16") to 70 mm (≈2-3/4") — range varies by diameter; see variant options |
| Material | Carbon Steel |
| Finish / Coating | Bright Nickel / Black Zinc / White Zinc (availability varies by size — see variant options) |
| Pack Quantity | 100 Pcs per order |
| Recommended Bit Size | #000–#00 (M1–M1.4) / #0 (M2–M2.5) / #1 (M3–M4) |
| Tensile Strength | See variant options / Contact us to confirm |
| Head Diameter | See variant options / Contact us to confirm |
| Country of Origin | Contact us to confirm |
A general rule: the screw length should provide at least 1.5× the thread diameter of engagement in the base material. For M3, that's typically at least 4.5 mm of thread engagement; for M4, at least 6 mm. If you're fastening two panels together, add the thickness of the top panel to the minimum engagement depth. Available lengths here range from 1.5 mm (≈1/16") to 70 mm (≈2-3/4"), depending on the diameter selected. When in doubt, size up slightly — a screw that's too short won't hold reliably.
The M number is the nominal thread diameter in millimeters. M1 (≈0.039") is the smallest and is typically used in micro-electronics, eyeglass frames, watch repair, and precision instruments. M2 (≈0.079") is common in laptop hinges, small electronics, and hobby robotics. M3 (≈0.118") is one of the most widely used sizes in 3D printers, RC vehicles, and light machinery. M4 (≈0.157") handles slightly heavier loads and is common in general hardware and light industrial assembly. Choose based on the tapped hole or nut size in your application.
Carbon steel machine screws in this size range are generally rated at property class 4.8, providing adequate tensile strength for light-to-medium duty assembly tasks such as electronics enclosures, hobby robotics, PCB mounting, and light machinery. For precise load ratings in structural or safety-critical applications, contact us to confirm the specific grade for your chosen variant.
Bright nickel, black zinc, and white zinc coatings all provide moderate corrosion resistance suitable for indoor and sheltered applications. For prolonged outdoor exposure, coastal environments, or direct water contact, stainless steel fasteners are generally recommended. If you're unsure whether a specific finish is suitable for your environment, contact us before ordering.
These are ISO metric machine screws with standard coarse thread pitches: M1×0.25, M1.2×0.25, M1.4×0.3, M2×0.4, M2.5×0.45, M3×0.5, M4×0.7. They are fully compatible with metric nuts, M-series heat-set threaded inserts (common in 3D-printed parts), and tapped holes following ISO metric standards. They are not compatible with UNC or UNF inch-standard threads.
Bright Nickel delivers a shiny, polished appearance well-suited for visible consumer electronics, decorative assemblies, and applications where aesthetics matter. Black Zinc provides a matte dark look commonly used in electronics enclosures, automotive interiors, and industrial equipment where a low-visibility fastener is preferred. White Zinc offers a silver-grey finish with solid general-purpose corrosion resistance for everyday hardware applications. Note that not all finishes are available for every size — check the variant selector above.
Pan head screws have a low-profile rounded top with a flat bearing surface underneath, which distributes clamping load over a wider area than a flat (countersunk) head and sits above the surface rather than flush. This makes them ideal for applications where countersinking is not possible or desired — such as thin sheet metal, PCB mounting, and plastic enclosures. Button heads are similar but have a more rounded profile; pan heads generally offer a slightly larger bearing surface and are more common in machine screw applications.
Using the correct Phillips bit size is critical to avoid cam-out and head damage, especially on small screws. As a general guide: M1–M1.4 typically require a #000 or #00 Phillips bit; M2–M2.5 generally use a #0 Phillips bit; M3–M4 typically use a #1 Phillips bit. A precision screwdriver set with multiple bit sizes is recommended when working with M1–M2 micro screws.
