Description Basic Product Description This is a self-tapping screw specific for assembly of plastic and thin wood, in particular where a dark or black finish is required. The screw has a flangeed fungus head (or half flangeed round), whose broad-based design distributes the clamping force on a wider area, often eliminating the need for a separate washer. The self-tapping mechanism creates its thread in the coupling material (plastic, wood, thin sheet) during screwing, allowing quick and efficient fixing. The black finish (often black galvanizing or phosphating) offers an aesthetic appearance and a standard corrosion resistance. (498 characters) Specifications Main techniques Type of Screw: Self-tapping (for plastic, wood/thin sheet). Dimensions: M3.5 x 8 mm (nominal diameter x length). Type of Head: Flanged Round (or Flanged Mushroom/ Flanged Round Half). Head function: Wide support surface for better load distribution. Finish: Black (typically black galvanizing or phosphating). Impronta (typical): Cross (Phillips PH or Pozidriv PZ). Material: Carbon steel. Typical applications: Assembly of plastic components, fixing of electric channels, light carpentry.