Self-Tapping Fastening Nail
Products Description
Self-Tapping Fastening Nails, as specialized fasteners with both "forming" and "locking" functions, are not simply "modified versions" of ordinary screws. Instead, they are highly efficient fastening units that achieve three core functions-"pre-tapping forming - mechanical locking - working condition adaptation"-through an integrated innovation of "self-tapping cutting/extrusion thread profile + scenario-specific materials + precise structural design." Essentially, they utilize the head guide structure and the self-tapping characteristics of the threads to form a matching thread by cutting or extruding the substrate during tightening. This eliminates the need for pre-drilling and tapping, achieving a tight engagement with the substrate and providing stable connections for industrial manufacturing, DIY processing, medical implantation, and other scenarios.
Self-Tapping Technology: A Dual-Track Logic of Cutting and Extrusion
Cutting-type self-tapping technology
The thread cutting edge adopts a cutting angle design of "5°-10° rake angle + 15°-20° clearance angle." For industrial-grade self-tapping screws on soft substrates such as wood and plastics, the cutting edge is hardened (hardness HV600 or higher) to ensure sharpness. For medical-grade Auto-Tapping Screw on bone tissue, the cutting edge is blunted to avoid excessive bone debris during cutting. Finite element simulation is used to optimize the cutting edge curvature, balancing cutting efficiency and bone tissue protection.
Extrusion-type self-tapping technology
The thread uses a trapezoidal tooth profile with blunted tooth tips. The thread is formed by extruding the substrate, suitable for ductile substrates such as metals. This avoids assembly hazards caused by chips, and the work-hardening effect generated by extrusion improves the strength of the threaded connection.
Torque matching technology
Based on the hardness and thickness of the substrate, the thread lead and head cone angle are optimized, resulting in "rapid forming with low torque on soft substrates and balanced torque to prevent damage on hard substrates." With its adaptation mechanism, the industrial-grade implantation torque fluctuation is ≤±10%, and the medical-grade implantation torque is precisely controlled within the clinically safe range (10-30N・m).
Material Advantages: A Leap from Industry to Medical
| High-strength Carbon Steel/Alloy Steel | Carburized and quenched or tempered, resulting in a hard, wear-resistant surface while maintaining core toughness. It is the primary material for joining metal sheets, wood, and rigid plastics in most industrial applications. |
| Corrosion-Resistant Stainless Steel (SUS304/SUS316) | Offers excellent corrosion resistance, suitable for applications requiring high cleanliness and weather resistance, such as electronic equipment, outdoor facilities, and kitchenware. |
| Specialty Engineering Plastics and Biocompatible Materials | This reflects our technological depth. We can provide Self-Tapping Fastenings made of specialty engineering plastics such as PEEK and PC for lightweight connections. Even more impressively, our manufacturing philosophy and technological reserves have reached into the field of biocompatible titanium alloys or polymer materials required in the medical field. Their precision and reliability are comparable to orthopedic implants, enabling your high-end applications. |
Detailed Demonstration: Making the Intangible Engineering Tangible
High-Speed Photography Comparison of Material Insertion Process: Using a high-speed microscopic camera, this demonstration compares our optimized Self-Threading Fasteners with ordinary products when inserting into the same material (e.g., aluminum alloy sheet). It highlights the morphology of metal chips (whether they are continuous or entangled) and the smoothness of the insertion process, visually reflecting the design's superiority or inferiority.
Connection Point Cross-Section Resin Molding Demonstration: The Self-Drilling and Self-Tapping Screw is screwed into a transparent resin simulation material, cured, and then cut open. Under a magnifying glass, it can be clearly seen that our product forms a complete "self-growing thread" shape, with no cracks at the root and a dense material; while inferior products may be surrounded by microcracks and voids.
Torque-Clamping Force Relationship Curves: For different base materials (e.g., pine wood, steel plate, ABS plastic), we provide typical installation torque and final clamping force relationship curves for our Self-Drilling Self-Forming Screws. This provides engineers with crucial data for precise preload control.
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