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When you need a screw that disappears into the surface, these flat-head Phillips self-tapping screws deliver a flush, snag‑free finish. The 90° countersink sits perfectly in standard holes, so nothing protrudes to catch on clothing, wiring, or moving parts – ideal for electronics enclosures, appliance panels, metal brackets, and wood joinery. Made from hardened carbon steel with a sleek black zinc plating, they offer reliable corrosion resistance indoors and in mild outdoor conditions, while the dark finish blends into shadowed areas for a cleaner look. The sharp self‑tapping thread slices into sheet metal, plastic, wood, and composites without a separate tapping operation, making assembly faster and simpler. BRT Fasteners supplies four practical metric diameters – M2, M2.3, M2.6, and M3 – giving you the right size for precision tasks like RC models, computer cases, cabinetry hardware, and light‑duty automotive repairs.
| Thread Spec. | Thread Diameter (d) | Head Diameter (dk) | Flat Angle | Typical Lengths (mm)* | Drive | Material & Finish |
|---|---|---|---|---|---|---|
| M2 | 2.0 mm | 3.5 mm | 90° | 6, 8, 10, 12, 16 | Phillips | Carbon Steel, Black Zinc Plated |
| M2.3 | 2.3 mm | 3.7 mm | 90° | 6, 8, 10, 12, 16, 20 | Phillips | Carbon Steel, Black Zinc Plated |
| M2.6 | 2.6 mm | 4.2 mm | 90° | 8, 10, 12, 16, 20, 25 | Phillips | Carbon Steel, Black Zinc Plated |
| M3 | 3.0 mm | 5.1 mm | 90° | 8, 10, 12, 16, 20, 25, 30 | Phillips | Carbon Steel, Black Zinc Plated |
* Lengths include the head (overall length). Head dimensions and angles conform to GB/T846 equivalent standards. Select your preferred diameter and length from the listing options.
For a truly flush fit, yes – a countersunk hole matching the 90° head angle is ideal. In thin sheet metal or soft plastic, the flat head may pull itself flush as you drive it without a separate operation. But for harder materials, a shallow countersink ensures the head sits perfectly flat.
Black zinc provides similar corrosion protection to standard zinc but with a dark, non‑reflective appearance. It’s great for applications where you want the hardware to blend into dark surfaces or reduce visibility. The coating is durable but eventually wears under heavy abrasion – for constant outdoor exposure, stainless steel may be a better choice.
In thin sheet metal (up to about 1 mm) and soft plastics, you can often drive them directly without a pilot hole. For thicker steel, hard plastics, or dense wood, a pilot hole about 80% of the thread diameter helps reduce driving torque and ensures clean thread engagement.
M2, M2.3, and M2.6 typically require a #0 Phillips bit, while M3 uses a #1 Phillips bit. A properly fitting, unworn bit will minimize cam‑out and preserve the drive recess.
