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Heavy Duty Wedge Anchor Bolt Suppliers in China - 304/316 Stainless Steel Factory Custom Expansion Anchors

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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, 40mm ~ 300mm (customizable)
, Surface Treatment: Natural polishing (corrosion resistant, no additional plating), electroplating / Hot-dip galvanizing (optional)
, Design Features: Wedge self-locking structure, full thread design, corrosion resistance, easy installation, shockproof and anti-loosening
, Applications: Ideal for construction engineering, elevator industry, infrastructure projects, and outdoor/humid environments
, Delivery Time: 15-30 days after receiving advance payment
, Origin: China
, Brand: JGD
, Minimum Order Quantity: 10,000 pieces (negotiable)
, Samples: Available upon request
, Packaging: Boxed/Bulk/Pallet or customized packaging options
, OEM: Available for tailored solutions
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, JGD is a leading factory and supplier of high-quality wedge anchor bolts in China. Our products are manufactured to meet stringent international standards ensuring durability and performance in various applications. With our commitment to excellence, we provide reliable solutions that cater to the needs of the construction and industrial sectors worldwide.

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    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws01
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    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

    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
    Material Resistance

    Material & Weather Resistance

    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. With strength grades A2-70 and A4-80, and sizes ranging from M6 to M20, they deliver long-lasting and reliable anchoring for applications from indoor elevator guide rails to humid outdoor curtain walls.

    Wedge Mechanism

    Wedge Locking Mechanism

    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 to significantly enhance anchoring force. The tested anti-seismic and anti-loosening performance fully meets the C1/C2 high-fatigue load requirements of ETAG 001 Annex E. In dynamic load scenarios such as elevator shaft brackets and bridge guardrails, they can stably withstand repeated alternating loads, preventing loosening or falling off even after long-term use, with ample safety redundancy.

    Installation Design

    Efficient Post-Installed Design

    The fully threaded integrated design allows the cutting depth to be adjusted arbitrarily according to on-site working conditions, eliminating the need for pre-embedded components and greatly reducing pre-construction preparation costs. The installation process only requires four simple steps: drilling the hole, cleaning the hole, inserting the anchor, and tightening the nut to the specified torque. This post-installed solution is especially suitable for scenarios such as existing building renovations and elevator guide rail installations. With sizes covering M6 to M20, they flexibly adapt to different hole diameters and load requirements, offering excellent versatility.

    Application Scenarios

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    Product Display Video

    Frequently Asked Questions

    What materials are available for the wedge anchors?
    We offer AISI 304/316 stainless steel for high corrosion resistance and carbon steel (SWRCH35K/45#) with hot-dip galvanizing for heavy-duty outdoor applications.
    Do these anchors support high-fatigue or seismic loads?
    Yes, our anchors meet the C1/C2 high-fatigue load requirements of ETAG 001 Annex E, making them suitable for elevator shafts and bridge guardrails.
    What are the available size ranges?
    Our standard sizes range from M6 to M20, with options for customizable extra large or long specifications upon request.
    How easy is the installation process?
    The post-installed design requires only four steps: drilling, cleaning the hole, inserting the anchor, and tightening the nut to the specified torque.
    Can I request custom packaging or labeling?
    Yes, we provide flexible customization services including personalized packaging, labeling, and customizable surface treatment colors.