Get A Quote!
Leave Your Message
1 (1).png
11.jpg
12.jpg
4.jpg
5.jpg

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

,

Introducing our Multifunctional Expansion Hook Anchor Bolt, manufactured using high-strength materials including Carbon Steel and 201/304 Stainless Steel. As a leading China supplier and factory, we ensure our products meet rigorous standards such as ETAG 001 and GB/T 22795, with grades ranging from Carbon Steel (4.8 / 8.to Stainless Steel (A1-50 for 201 and A2-70 for 304).
Our anchor bolts are available in various specifications: M6, M8, M10, M12, M14, and M16, typically ranging in length from 60mm to 200mm, with customizable options.
For surface treatment, our Carbon Steel options include environmentally friendly color zinc, blue-white zinc, and hot-dip galvanizing, while our Stainless Steel options feature electrolytic polishing and natural color finishes.
Designed with diverse top hook variations and a powerful expansion mechanism, our anchor bolts also include large-surface flange nuts for enhanced performance. They exhibit outstanding corrosion resistance, making them reliable for various applications such as home appliance suspension, indoor and outdoor hoisting systems, industrial warehousing, billboard and curtain wall construction, and plumbing engineering.
With a delivery time of 15-30 days after receiving advance payment, we cater to both large and small orders, with a minimum quantity of 10,000 pieces, negotiable for different client needs. Samples are available upon request, and we offer flexible packaging options including boxed, bulk, pallet, or customized solutions.
Choose our Multifunctional Expansion Hook Anchor Bolt, your trusted partner from China in high-quality construction solutions. OEM services are also available to meet your specific requirements.

,
    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws01
    Contact us
    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws02
    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.
    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws04
    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws05
    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws06

    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.
    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws08
    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws07
    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws03

    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

    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

    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.

    Corrosion Protection

    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.

    Diverse Hooks

    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.

    Expansion Anchoring

    Factory Environment

    Factory 1
    Factory 2
    Factory 3
    Factory 4
    Factory 5

    High-Quality Stainless Steel Self-Tapping Screw Display

    Frequently Asked Questions

    1. What materials are available for your expansion anchors and screws?
    We offer products in carbon steel (with various platings like yellow zinc or hot-dip galvanized) and high-grade stainless steel (201 and 304) to meet different environmental corrosion requirements.
    2. Can I request custom head or slot shapes for my specific application?
    Yes, we provide flexible customization capabilities, including customizable head/slot shapes, special materials, and extra-large or long specifications to fit unique project needs.
    3. How do you ensure the quality of each batch?
    Our quality control system includes raw material source locking, furnace number batch traceability, third-party certification, and real-time salt spray monitoring to ensure international standard compliance.
    4. What is the load capacity of your expansion anchors?
    Our anchors are designed for rock-solid load capacity, achieving Grade 8.8 (≥800MPa) tensile and shear strength, proven through rigorous destructive pullout testing in concrete.
    5. Do you provide technical support for installation or selection?
    Absolutely. We offer on-site failure analysis, selection calculations, BOM optimization, and guidance on choosing the correct installation tools for your specific application.
    6. Are these products suitable for humid or coastal environments?
    For damp or coastal environments, we highly recommend our 304 stainless steel options, which offer superior salt-spray resistance to prevent rust and brittleness.