Our galvanized fish‑scale multi‑segment expansion anchor is made of high‑strength carbon steel (Grade 4.8/8.8). Sharp fish‑scale bidirectional barbs – arranged like fish scales, they bite into hollow brick walls to prevent rotation and slippage; the multi‑segment staged expansion structure provides progressive expansion, adapting to varying wall thicknesses and hole tolerances for more uniform anchorage. The top annular anti‑slip knurling prevents cam‑out during tightening. Sizes M6‑M16, lengths 60‑200mm custom. Suitable for hollow brick wall reinforcement, window/curtain walls, heavy‑duty handrails, ceiling suspension, and industrial racking. Installation: drill → clean hole → insert anchor → tighten with wrench or screwdriver – segments expand progressively against the hole wall.
Manufacturing Process
• Multi Station Cold Heading Technology
• Intelligent Heat Treatment System
• Micron-Level Thread Rolling Process
• Fully Automatic Optical Sorting
• Environmentally Friendly Surface Treatment Line
• Metallographic And Mechanical Joint Laboratory
Quality Control System
• Raw Material Source Locking
• Furnace Number Batch Full Traceability
• Third Party Material Certification
• Process Parameters Open And Transparent
• Salt Spray Test Real Time Monitoring
• International Standard Compliance Declaration
Flexible Customization Capability
• Customizable head/slot Shapes
• Extreme Application Of Special Materials
• Breakthroughs In Extra Large/Long Specifications
• Integrated Assembly Of Components
• Customizable Surface Treatment Colors
• Personalized Packaging And Labeling
Technical Service
• On-Site Failure Analysis
• Selection Calculation And BOM Optimization
• Installation Tool Selection Guidance
• Inventory Management (VMI) Trusteeship
• Free Sample Making And Testing
• International Standard Translation And Interpretation
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Sharp Fish-Scale Bidirectional Barbs – Anti-Rotation & Bite in Hollow Bricks
Sharp fish-scale barbs spiral along the surface, embedding into hollow brick walls to prevent rotation and slipping. Under rotation or pull-out stress, they anchor firmly, offering several times higher holding power than smooth sleeves – ensuring permanent, non-shifting fixing for curtain walls and heavy railings.
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Multi-Segment Staged Expansion – Progressive Wall Contact for Superior Reliability
Unique multi-segment staged expansion – each petal opens sequentially during tightening, progressively pressing against the hole wall. The design compensates for hole deviations, ensuring full contact and even force distribution, avoiding stress concentration that could crack hollow bricks – ideal for porous and lightweight blocks.
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Dual Corrosion Protection + Anti-Slip Knurling – Built to Last
Dual Corrosion Protection + Anti-Slip Knurling – Built to Last
Carbon steel with blue-white or yellow zinc plating resists moisture and mild corrosion for indoor/outdoor use. Top anti-slip knurling provides friction during tightening, preventing cam-out and ensuring torque accuracy. Fatigue-tested, it resists loosening under vibration, with long replacement cycles in railings and racking.
Factory Environment
Industrial Capabilities
• Factory Area: 8,000 square meters
• Certifications: ISO, IATF, CE, RoHS, JIS, ASTM
• Manufacturing : 70+ internationally advanced production lines
• Testing: 30+ sets of precision quality testing equipment
• Annual Output: Up to 50,000,000 tons
From Unprocessed Materials to Completed Items
Our factory's fully automated production lines for cold heading, precision thread rolling, controlled-atmosphere heat treatment, and environmentally friendly surface finishing enable closed-loop manufacturing from raw material to finished product. Because of inline optical sorting and a digital MES, every fastener meets stringent standards for strength, accuracy, and surface quality. Your promise of excellent fasteners: they are dependable, effective, and environmentally responsible.
Innovation Lab:
Expertise and collaboration drive us forward, constantly pursuing innovative solutions. Have a project? Let's get started.
The Whole Collaborative R&D Process: From "Pain Point Diagnosis" to "Customized Implementation"
We provide more than just standard parts. From the beginning, our multicultural engineering team actively contributes to your project. We carefully analyze the application context and customize solutions in the lab, seamlessly fusing technology and application, to guarantee that innovative ideas are quickly transformed into practical solutions that reduce overall lifetime costs.
Integrated Verification System: Using "Test Data" to Ensure Innovation
The creative process doesn't stop at the drawing board. Through our internal technical center, we provide one-stop verification for anything from corrosion testing to prototype creation. Through extensive simulated working condition tests, we use empirical data to confirm the performance stability of tailored solutions. This significantly reduces project risks while also attaining truly reliable cost reduction and efficiency improvement.
