I. Product Function
1. Equipped with a self-drilling tail end, requiring no pre-drilling during installation. Drilling, tapping, and locking can be completed in one operation. Suitable for fixing color steel roofing, light steel keels, stainless steel sheets, and aluminum alloy panels;
2. Dedicated fasteners for wall and roof panels of steel structure workshops, photovoltaic supports, curtain wall enclosures, and light steel villa metal sheet assembly;
3. Suitable for fixing and joining ventilation ducts, anti-corrosion composite sheets, and outdoor steel structure enclosure panels.
II. Specification and Standard Parameter Table
Parameter Item | Production Range / Optional Type |
Applicable Standard | GB/T 15856.2, DIN 7504P |
Main Specifications | ST3.5, ST4.2, ST4.8, ST5.5, ST6.3 |
Head Type | Countersunk head with Phillips recess |
Processing Technology | Cold-heading formed head, precision thread rolling, and heat-treated drilling tip at the tail end |
Surface Treatment | Stainless steel pickling and passivation, carbon steel colored zinc / black zinc plating |
Optional Materials | 410 stainless steel, 304 stainless steel |
Applicable Sheet Thickness | 0.5mm–12mm steel plates, color steel sheets, and aluminum alloy panels |
III. Material Application Scenarios
1. 410 stainless steel self-drilling screws: suitable for indoor light steel keels and ordinary color steel workshops, with high hardness and strong drilling penetration;
2. 304 stainless steel self-drilling screws: suitable for outdoor roofing, coastal factory areas, and high-salt-spray outdoor projects, providing long-term rust and corrosion resistance.
IV. Product Advantages
3. The drilling tail structure eliminates the need for pre-drilling, significantly shortening construction time and reducing labor costs;
4. The countersunk tapered head is fully embedded into the sheet after locking, leaving a flat surface without protrusion, improving waterproof performance and appearance while reducing rainwater accumulation and leakage;
5. Full-length self-tapping threads provide tight engagement and strong pull-out resistance, preventing loosening or detachment under long-term wind loads on roofing systems;
6. Stainless steel material resists rainwater and salt spray corrosion, making it suitable for long-term outdoor steel structure enclosure projects;
7. The Phillips recess is compatible with electric screwdrivers and manual Phillips screwdrivers, offering strong on-site versatility and convenient installation and removal.