Product Description
A Self-Drilling Self-Tapping Screw is an integrated and efficient fastener designed for one-step installation in thin steel plates and light steel structures, combining drilling, tapping, and locking functions in a single operation. Manufactured with 410 stainless steel (hardness HRC 45-50) or carbon steel (with galvanizing + passivation treatment), this product features a sharp drill point (tungsten carbide tip option) and fine-thread design, enabling direct penetration of 12mm thick steel plates without pre-drilling, which improves installation efficiency by 80% compared to traditional "drill + tap + bolt" processes. One of the key features of this screw is its strong holding power—the fine-thread design increases contact area with the connected material, providing a pull-out load capacity ≥3kN (for M5×25mm screw in 3mm steel plate) and excellent anti-loosening performance under slight vibration. The cross-slot or internal hexagon drive head ensures uniform torque transmission during installation, avoiding slippage and damage to the screw head, while the countersunk or pan head design allows for flush or low-profile installation, enhancing aesthetic appeal and preventing snagging. The 410 stainless steel version offers good corrosion resistance (salt spray resistance ≥500 hours) for outdoor applications, while the galvanized carbon steel version is cost-effective for indoor use. It is widely used for connecting color steel plates, sandwich panels, aluminum profiles, and light steel purlins in steel structure workshops, prefabricated houses, container houses, and agricultural greenhouses. The product complies with ISO 15480 and GB/T 15856 standards, ensuring consistent quality and compatibility with standard installation tools (electric screwdrivers, cordless drills). Professional services include screw size selection guidance (based on material thickness and load requirements) and on-site installation efficiency training, helping customers reduce labor costs and improve construction progress.
Applications
Self-Drilling Self-Tapping Screws are high-efficiency fasteners widely used in light steel structure enclosure systems and thin-plate connection projects. Certified by ISO 15480 and GB/T 15856, they meet international fastener standards, ensuring reliable performance in non-heavy-load connection scenarios. These screws are suitable for diverse applications, including fixing color steel plates to purlins in warehouse and workshop roof/wall systems, connecting sandwich panels (EPS, rock wool) in prefabricated houses and mobile clinics, assembling aluminum alloy frames in exhibition booths and temporary structures, securing metal ceiling panels in commercial spaces, and attaching solar panels to light steel brackets in rooftop solar systems. They are particularly ideal for fast-track projects (e.g., emergency shelter construction) and small-scale installations (e.g., residential shed assembly) due to their one-step installation and no pre-drilling requirement. The minimum order quantity is 1000 pieces for standard specifications (M3-M8, length 16-50mm), and customized options are available for screw material (410 stainless steel, carbon steel), drive type (cross-slot, internal hexagon), head type (countersunk, pan, hex washer head), and drill tip material (tungsten carbide) to meet specific application needs. Competitive pricing and bulk purchase discounts (for orders over 10,000 pieces) enhance cost-effectiveness, while the short delivery time (1-3 workdays for standard orders) supports urgent construction and maintenance projects. With a monthly supply capacity of 10,000,000 pieces, the manufacturer ensures timely delivery even for large-scale enclosure system projects. The corrosion-resistant surface treatment (stainless steel or galvanizing) and high-hardness drill tip ensure durability in indoor and outdoor environments, including coastal areas (stainless steel version) and dry inland regions (galvanized version). Customization options also include weather-resistant coating (fluorocarbon) for long-term outdoor use and self-sealing washers (EPDM) for waterproof connections (e.g., roof panels). Whether it's for new light steel enclosure construction or old structure maintenance (panel replacement), the Self-Drilling Self-Tapping Screw delivers fast and reliable fixing performance.
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