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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 every time. Made from genuine A2/304 stainless steel and hardened with a high‑temperature blackening treatment, they combine the sleek, dark look of black oxide with the real corrosion resistance of 304 stainless – no paint, no plating that chips. The 90° countersunk head sits perfectly in standard holes, leaving nothing to catch on wiring, clothing, or moving parts. Sharp self‑tapping threads bite instantly into sheet metal, plastic, wood, and composites, eliminating tapping steps and nuts. From M1.7 micro‑fasteners for electronics up to M6.3 for larger metal brackets and outdoor equipment, this series covers your full range of light‑ to medium‑duty fastening. Whether you’re working on automotive panels, marine hardware, outdoor enclosures, or just want a rust‑proof, low‑profile screw that looks great, this black 304 stainless range has you covered.
| Thread Spec. | Thread Diameter | Typical Lengths (mm)* | Head Style | Drive | Material & Finish |
|---|---|---|---|---|---|
| M1.7 | 1.7 mm | 4 – 16 | Flat 90° Countersunk | Phillips | A2/304 Stainless, High‑Temp Blackened |
| M2 | 2.0 mm | 4 – 20 | Flat 90° Countersunk | Phillips | A2/304 Stainless, High‑Temp Blackened |
| M2.3 | 2.3 mm | 5 – 25 | Flat 90° Countersunk | Phillips | A2/304 Stainless, High‑Temp Blackened |
| M2.6 | 2.6 mm | 6 – 30 | Flat 90° Countersunk | Phillips | A2/304 Stainless, High‑Temp Blackened |
| M3 | 3.0 mm | 6 – 40 | Flat 90° Countersunk | Phillips | A2/304 Stainless, High‑Temp Blackened |
| M3.5 | 3.5 mm | 8 – 50 | Flat 90° Countersunk | Phillips | A2/304 Stainless, High‑Temp Blackened |
| M4 | 4.0 mm | 8 – 60 | Flat 90° Countersunk | Phillips | A2/304 Stainless, High‑Temp Blackened |
| M4.8 | 4.8 mm | 10 – 70 | Flat 90° Countersunk | Phillips | A2/304 Stainless, High‑Temp Blackened |
| M5 | 5.0 mm | 12 – 80 | Flat 90° Countersunk | Phillips | A2/304 Stainless, High‑Temp Blackened |
| M6 | 6.0 mm | 16 – 100 | Flat 90° Countersunk | Phillips | A2/304 Stainless, High‑Temp Blackened |
| M6.3 | 6.3 mm | 16 – 120 | Flat 90° Countersunk | Phillips | A2/304 Stainless, High‑Temp Blackened |
* Lengths are overall length (including head). Dimensional data follows GB/T equivalent standards. Select your exact size from the product listing options.
No. The deep black color is a high‑temperature oxidation treatment that chemically bonds to the stainless steel. It won’t chip, flake, or wear off like paint. The screws remain corrosion‑resistant 304 stainless steel underneath, so they’ll stay clean even in outdoor and marine environments.
These screws feature a standard 90° countersunk head. When driven into a properly countersunk hole, the head sits completely flush or slightly below the surface. For thin sheet metal or soft plastic, the head will often pull itself flush without a separate countersink operation.
They work well across all these materials. The self‑tapping thread bites into sheet metal, hardwood, softwood, plastics, and fiberglass. A small pilot hole in very dense materials (like hard oak or thick steel) will make driving smoother and preserve thread life.
Yes, the listed lengths include the head (overall length). This is in contrast to many pan head or hex head screws, where the head height is excluded. Be sure to account for the head thickness when calculating material thicknesses.
