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When your project demands a wider bearing surface without the bulk of a full truss head, these PWA round washer head self-tapping screws hit the sweet spot. The integrated washer face spreads clamping force over a larger area than a standard pan head, helping prevent pull‑through in thin sheet metal, plastic panels, and wood. Fabricated from carbon steel with a bright nickel-plated finish, they offer dependable corrosion resistance for indoor electronics, appliance assembly, light fixtures, and automotive interior work. BRT Fasteners supplies four of the most useful diameters — M1.7, M2, M2.3, and M2.6 — all featuring a sharp self‑tapping thread that cuts its own path without a pre‑tap. Whether you’re fastening PCB mounts, RC components, or small metal enclosures, you’ll appreciate a screw that stays put and looks clean.
| Size | Thread Ø (d) | Head Ø (dk) | Washer Ø (dc) | Head Thickness (k) | Typical Lengths (mm)* | Drive | Material & Finish |
|---|---|---|---|---|---|---|---|
| M1.7 | 1.7 mm | 3.8 mm | 5.0 mm | 1.30 mm | 6 – 16 | Phillips | Carbon Steel, Nickel Plated |
| M2 | 2.0 mm | 3.9 mm | 5.1 mm | 1.41 mm | 6 – 20 | Phillips | Carbon Steel, Nickel Plated |
| M2.3 | 2.3 mm | 4.0 mm | 5.2 mm | 1.8 mm | 8 – 25 | Phillips | Carbon Steel, Nickel Plated |
| M2.6 | 2.6 mm | 5.0 mm | 6.0 mm | 2.53 mm | 8 – 30 | Phillips | Carbon Steel, Nickel Plated |
* Lengths depend on the pack you choose. All dimensions follow GB/T equivalent standards.
The washer head has a wider, flat bearing surface that spreads the clamp load over a larger area. This reduces the chance of the screw pulling through thin or soft materials, often eliminating the need for a separate washer. It gives you a cleaner, more secure assembly with fewer parts.
They work very well in both. The sharp self‑tapping thread bites cleanly into softwoods, hardwoods, and sheet metal. For dense hardwoods, drilling a pilot hole about 80% of the screw diameter will make driving easier and protect the thread.
Nickel plating provides better corrosion resistance in damp and mildly acidic environments than standard zinc. It also maintains a bright, silvery appearance that doesn’t dull as quickly, making it a popular choice for visible fasteners in electronics and appliances.
In thin sheet metal (up to about 1.2 mm), you can often drive them straight in. For thicker steel, hard plastics, or dense wood, a small pilot hole will reduce drive torque and give you the cleanest thread engagement.
Yes. They are shipped in BRT Fasteners branded packaging and quality‑inspected for thread sharpness, plating consistency, and dimensional accuracy before dispatch.
