Hex Flange Self-Drilling Screws With Three Notches Thread

Our screws are upgraded heavy-duty industrial drilling fasteners, specially optimized to solve the problems of high resistance, labor consumption and easy bit wear of ordinary self-drilling screws when drilling thick steel plates and hard profiles. Different from conventional single-point drill tail screws, this product adopts a unique symmetrical Three Notches cutting thread structure, with three sets of precision thread evenly distributed around the drill tail, forming a multi-angle synchronous cutting system. This innovative design effectively disperses concentrated drilling resistance, greatly reduces construction friction and operating labor, and realizes labor-saving, smooth and efficient drilling operation for high-hardness thick substrates that ordinary drill tail screws cannot penetrate stably. The integrated one-piece hex flange head features a large flat pressure-bearing surface, which can evenly disperse locking pressure during high-resistance fastening, avoid local stress concentration, prevent steel plate deformation, sinking and loosening, and ensure ultra-stable clamping effect after installation. The optimized thread trajectory of the Three Notches thread is precisely polished to reduce cutting abrasion, effectively avoid drill tail jamming, thread breakage and premature wear during long-time high-intensity drilling, and significantly extend the service life of the screws. Made of high-strength hardened steel with excellent hardness, toughness and shear resistance, the screws can maintain stable cutting performance and structural integrity during continuous drilling of thick steel, aluminum alloy and hard composite plates. Compared with ordinary drill tail screws, it has stronger penetration, higher construction efficiency and better durability, making it a professional high-efficiency fastening solution for heavy steel structure engineering, thick plate installation and high-hardness material construction projects.

Key Features

- Exclusive Three Notches Symmetrical Cutting Design: Three sets of integrated thread form multi-angle synchronous cutting, evenly disperse drilling resistance, realize labor-saving drilling, and solve the problem of difficult penetration of thick hard materials.

- High-Penetration Hard Material Adaptability: Upgraded cutting thread hardness and structural strength, capable of stably drilling thick steel plates, aluminum alloy profiles and hard composite plates, with far stronger penetration than ordinary drill tail screws.

- Integrated Heavy-Duty Hex Flange Head: Large-area pressure-bearing flange structure, uniform stress dispersion, effectively prevents substrate deformation and loosening during high-resistance fastening, improves overall connection stability.

- Anti-Jam & Wear-Resistant thread: Optimized smooth cutting trajectory reduces friction and abrasion, avoids drill tail jamming and thread breakage during high-intensity operation, prolongs screw service life.

- High-Strength Hardened Steel Material: Excellent shear resistance, impact resistance and structural stability, adapts to long-term heavy-duty engineering drilling and fastening, not easy to deform or damage.

- One-Step Drilling & Fastening: Integrates drilling, tapping and locking functions, no pre-drilling required, greatly improves the construction efficiency of large-scale heavy engineering projects.

Applications

- Heavy steel structure and thick steel plate engineering installation

- High-hardness metal profile and alloy plate fastening projects

- Large-scale building construction high-resistance drilling fixing

- Mechanical equipment thick plate assembly and reinforcement connection

- Labor-saving and high-efficiency batch construction engineering scenarios