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304/316 Stainless Steel Wedge Anchor Bolt Heavy Duty Expansion Anchor for Concrete - China Suppliers & Factory

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Name: Wedge Anchor Bolt
Material: AISI 304/316, SWRCH35K/45# Carbon Steel
Standards: GB/T 22795, ETAG 001, ASTM F1554
Grade: Stainless Steel A2 (30/ A4 (316), Carbon Steel 8.8 / 10.9
Specifications: M6–M20, lengths from 40mm to 300mm (customizable)
Surface Treatment: Natural polishing (no additional plating, corrosion resistant), electroplating / Hot-dip galvanizing (available upon request)
Design Features: Wedge self-locking structure, complete thread design, excellent corrosion resistance, easy installation, shockproof and anti-loosening capabilities
Applications: Suitable for construction engineering, elevator industry, infrastructure development, and outdoor or humid environments
Delivery Time: 15-30 days after advance payment confirmation
Origin: China
Brand: JGD
Minimum Order Quantity: 10,000 pieces (negotiable)
Samples: Available on request
Packaging: Options include boxed, bulk, pallet, or customized packaging
OEM Services: Available
Looking for reliable China suppliers? Our factory specializes in high-quality Wedge Anchor Bolts that meet various industry standards while ensuring durability and performance.

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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.
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    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

    Core Advantages

    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

    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 And Interpretation
    Material Resistance
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    Material & Weather Resistance for Demanding Conditions

    Our wedge anchors are available in two major material series: AISI 304/316 stainless steel and carbon steel. The 316 stainless steel version features outstanding resistance to chloride ion corrosion, easily withstanding highly corrosive environments such as coastal salt spray and wastewater treatment plants. The carbon steel version offers SWRCH35K/45# options with hot-dip galvanizing, balancing high strength and outdoor rust prevention.

    Wedge Locking Mechanism
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    Wedge Locking Mechanism for High Load Capacity

    Featuring a core wedge-locking expansion sleeve design, tightening the nut drives the wedge block to expand under pressure, forming a 3D interlocking bite with the concrete hole wall. Tested anti-seismic performance fully meets the C1/C2 high-fatigue load requirements of ETAG 001 Annex E. Ideal for elevator shaft brackets and bridge guardrails.

    Installation Design
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    Fully Threaded Post-Installed Design

    The fully threaded integrated design allows the cutting depth to be adjusted arbitrarily according to on-site working conditions. The installation process is simple: drilling, cleaning, inserting, and tightening. This solution is especially suitable for existing building renovations and elevator guide rail installations, offering excellent versatility across sizes M6 to M20.

    Application Scenarios

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    High-Quality Product Display

    Frequently Asked Questions

    What materials are used for your wedge anchors?
    We offer AISI 304 and 316 stainless steel for superior corrosion resistance, as well as carbon steel (SWRCH35K/45#) with hot-dip galvanizing for high-strength applications.
    Are these anchors suitable for outdoor or coastal use?
    Yes, our 316 stainless steel anchors are specifically designed to withstand chloride ion corrosion in coastal salt spray and humid environments.
    What international standards do your products comply with?
    Our products meet the C1/C2 high-fatigue load requirements of ETAG 001 Annex E, ensuring safety in anti-seismic and dynamic load scenarios.
    Can I customize the size or packaging?
    Absolutely. We provide flexible customization for head shapes, special materials, extra-long specifications, and personalized labeling or packaging.
    What technical support do you provide?
    We offer comprehensive services including on-site failure analysis, selection calculations, BOM optimization, and free sample making for testing.
    What is the size range available?
    Our standard production range covers diameters from M6 to M20, suitable for various load requirements and concrete hole diameters.