The Sealey 510 Piece Countersunk Self Tapping Screw Assortment is a comprehensive set of professional-grade fasteners designed for metalwork, sheet material fixing and general trade applications. This organised collection features DIN 7982 standard self-tapping screws with countersunk Pozi heads, providing a reliable fastening solution across a range of common sizes. Supplied in a practical partitioned storage box, this assortment keeps fixings organised and readily accessible on site or in the workshop. The selection includes six different size combinations ranging from 3.5mm to 4.8mm diameter, with lengths from 16mm to 38mm, ensuring you have the right screw for various fixing depths and material thicknesses. The countersunk head design allows screws to sit flush with the work surface, ideal for applications where a smooth finish is required. Self-tapping screws eliminate the need for pre-drilling pilot holes in thin gauge materials, making them particularly suited to sheet metal fabrication, HVAC installation, electrical enclosures and general metal-to-metal fixing tasks. Features and Benefits: • DIN 7982 standard ensures consistent quality and reliable performance • Countersunk Pozi head design provides flush finish and positive drive engagement • Self-tapping thread cuts its own path for efficient fixing without pre-drilling • Partitioned storage box keeps different sizes organised and protected • Six popular size combinations cover common trade applications Specifications: Brand: Sealey Contents: (Approximate Quantity) Diameter x Length; 3.5 x 16 (x140), 3.5 x 25 (x140), 4.2 x 19 (x130), 4.2 x 25 (x50), 4.2 x 38 (x20), 4.8 x 38mm (x30) Nett Weight: 0.98kg