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China Factory Suppliers Stainless Steel Heavy Duty Multifunctional Expansion Hook Bolt Concrete Sleeve Anchor

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Name: Multifunctional Expansion Hook Anchor Bolt
Material: High Strength Carbon Steel / 201 Stainless Steel / 304 Stainless Steel
Standards: ETAG 001, GB/T 22795
Grade: Carbon Steel: 4.8 / 8.8, Stainless Steel: A1-50 (20/ A2-70 (304)
Specifications: M6, M8, M10, M12, M14, M16 (Length ranges from 60mm to 200mm, customizable options available)
Surface Treatment: Carbon Steel: Eco-friendly color zinc, blue-white zinc, hot-dip galvanized; Stainless Steel: Electrolytic polished, natural color (Natural)
Design Features: Various top hook designs, efficient expansion mechanism, large-surface flange nuts, high corrosion resistance across multiple materials, and an extensive range of stepped specifications.
Applications: Ideal for home appliance suspension, indoor and outdoor hoisting systems, industrial and warehousing facilities, billboard and curtain wall construction, as well as plumbing and piping engineering.
Delivery Time: 15-30 days upon receiving the advance payment
Origin: China
Brand: JGD
Minimum Order Quantity: 10,000 pieces (negotiable)
Samples: Available for testing
Packaging: Options include boxed, bulk, pallet, or customized packaging
OEM: Available
Suppliers: Trusted China suppliers providing high-quality products directly from the factory.

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    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws01
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    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws01

    Key Features

    Our self-tapping screws are crafted from food-grade 304 stainless steel and treated to achieve metric Grade 12.9 ultra-high strength, overcoming the traditional hardness limitations of standard stainless steel. Featuring a countersunk Phillips head design, these screws can be installed flush with the workpiece surface for a zero-profile finish, making them ideal for precision electronics and architectural decoration. We have optimized the thread geometry for different substrates (metal, wood) to ensure low-torque driving with high-torque clamping, effectively preventing stripping. As a superior alternative to standard Tek screws, these fasteners perform exceptionally well in thin sheet metal connections, providing an intelligent fastening solution that balances aesthetics with high load-bearing capacity.
    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws01
    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws03
    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws04

    Precision Manufacturing Process

    From wire rod to finished product, we strictly adhere to multiple international standards including ISO, DIN, ANSI, and GB. Utilizing multi-station cold forging technology, we ensure shank diameter tolerances are controlled within microns. Threads are formed through a precision thread rolling process to enhance fastening force. For non-standard requirements, we employ optical imaging sorters to reject minute defects like head cracks. In post-treatment, we offer a wide range of surface finishing options: from conventional zinc plating and nickel plating to highly corrosion-resistant Hot-Dip Galvanizing (H.D.G.), as well as decorative polishing and black anodizing. We even provide food-grade passivation treatment, ensuring every screw has a prolonged fatigue life in demanding environments.
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    Transparency & Customization

    As a source factory, we are committed to breaking down the information barriers of traditional trade. From mill certificates for raw materials to hardness grades (covering Grade 4.8 to Grade 12.9, as well as A2-70 and A4-80 marine-grade stainless steel), all test data is traceable. We support full-chain customization: dimensionally, we can adjust thread length and head thickness according to drawings; functionally, we can combine processes like sandblasting, electrophoretic coating (e-coating) , or chrome plating. Whether you need British Standard (BS) fasteners or require a special colored anodized finish, we offer small-batch sampling. This ensures that when you purchase fasteners from us, you not only receive high-quality products but also full transparency and control over the entire process, from material selection to packaging.
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    No Pre-Drilling · Rust Resistant · More Secure

    This stainless steel Phillips countersunk self-tapping screw, with its rust-resistant and corrosion-resistant material, one-step self-tapping design, and aesthetically pleasing countersunk head structure, has become the preferred solution for metal substrate fastening scenarios that is efficient, reliable, and aesthetically pleasing.
    Product Details

    Manufacturing Process

    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

    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

    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

    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
    Multi-Material Protection
    01 Multi-Material Corrosion Protection for All Environments
    Available in carbon steel (yellow/zinc/hot-dip galvanized), 201 or 304 stainless steel (A1-50/A2-70). Carbon steel with multi-layer zinc plating suits dry indoor and general construction; 304 stainless steel offers excellent salt-spray resistance for coastal outdoor, damp basements, or chemical plants. Choose the right material for any environment – ensuring hooks stay rust-free, won't become brittle, and guarantee safe suspension.
    Diverse Top Hooks
    02 Diverse Top Hooks – One Anchor for Multiple Needs
    Offered in closed ring, open hook, eye ring, V-hook, and more – one anchor, many uses. Closed rings suit rope hanging, open hooks enable quick attachment/removal, eye rings fit chains or wire ropes, V-hooks are designed for pipes and cables. All hooks are cold-formed with no cracks or internal defects – they won't deform or break under load, meeting diverse needs from appliance hoisting to signboards and pipe fixing.
    Powerful Expansion
    03 Powerful Expansion Anchoring – Rock-Solid Load Capacity
    The built-in cone expands the sleeve as the nut is tightened, with expansion wings gripping the concrete hole wall firmly – delivering high tensile & shear strength (Grade 8.8 ≥800MPa). The large flange nut provides anti-loosening and slip resistance against vibration. Proven in destructive tests, the ultimate pullout force in concrete far exceeds similar products. Withstands both static and dynamic loads without shifting or sinking – ensuring absolute safety for overhead suspended items.

    Factory Environment

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    High-Quality Stainless Steel Self-Tapping Screw Display

    Frequently Asked Questions

    What materials are available for your expansion anchors?
    We offer anchors in carbon steel (with yellow zinc or hot-dip galvanized coating), 201 stainless steel, and high-quality 304 stainless steel to suit various environmental conditions from dry indoor to coastal outdoor areas.
    Can the hook shapes be customized for specific applications?
    Yes, we provide flexible customization. You can choose from closed rings, open hooks, eye rings, V-hooks, and more, depending on whether you are hanging ropes, chains, pipes, or cables.
    What is the load-bearing grade of these fasteners?
    Our products reach Grade 8.8 with a tensile strength of ≥800MPa. They are designed for powerful expansion anchoring in concrete, ensuring a rock-solid load capacity for both static and dynamic loads.
    How do you ensure the quality of the manufacturing process?
    We utilize multi-station cold heading technology, intelligent heat treatment, and micron-level thread rolling. Every batch undergoes fully automatic optical sorting and is tested in our metallographic and mechanical joint laboratory.
    Do you offer technical support for installation?
    Absolutely. We provide technical services including selection calculations, BOM optimization, on-site failure analysis, and guidance on choosing the correct installation tools.
    Is there a way to trace the material source?
    Yes, we implement a full traceability system based on furnace number batches and provide third-party material certification to ensure absolute transparency and compliance with international standards.