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If you need a fastener that disappears into the surface while standing up to moisture and corrosion, these 304 A2 stainless steel flat-head self-tapping screws are exactly what you’re looking for. The countersunk head sits flush or slightly below the material, giving a smooth, snag‑free finish that’s ideal for sheet metal enclosures, electronic chassis, outdoor light fixtures, and marine hardware. Because they’re self-tapping, you can drive them directly into the workpiece without tapping threads or adding nuts — the screw cuts its own path in metals, plastics, and composites. BRT Fasteners provides three of the most useful small diameters — M2.2, M2.6, and M3 — so you always have the right size for delicate electronics, RC models, appliance panels, and light fabrication.
| Size | Thread Diameter | Typical Length Range (mm) | Head Style | Drive | Material |
|---|---|---|---|---|---|
| M2.2 | 2.2 mm | 6 – 16 | Flat Head (Countersunk) | Phillips | 304 / A2 Stainless Steel |
| M2.6 | 2.6 mm | 8 – 20 | Flat Head (Countersunk) | Phillips | 304 / A2 Stainless Steel |
| M3 | 3.0 mm | 10 – 30 | Flat Head (Countersunk) | Phillips | 304 / A2 Stainless Steel |
* Lengths vary by pack selection. All screws are manufactured to GB/T846 dimensional standards.
For sheet metal or thin plastics, the flat head usually seats flush without a separate countersink operation. In thicker or harder materials, a shallow countersink will help the head sit perfectly flush. The self‑tapping thread still forms its own engagement.
304 A2 stainless is slightly magnetic after cold working (like thread forming), but significantly less magnetic than carbon steel. It will not interfere with most electronics or sensitive equipment.
Yes, 304 A2 stainless is widely used for marine and coastal applications. It resists red rust effectively, though surface tea staining can occur over time. Periodic rinsing with fresh water keeps them looking bright.
These are self-tapping, not self-drilling. They need a pre‑punched or pre‑existing hole. The screw then cuts or forms its own mating thread as it’s driven. Self-drilling screws have a drill point and can create the hole and drive in one step.
Absolutely. They are shipped in BRT Fasteners branded packaging and quality‑checked for thread consistency and surface finish before dispatch.
