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Golden Zinc Plated Self-Drilling Hollow Wall Anchor - Heavy-Duty Butterfly Expansion Bolts from China Suppliers & Factory

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Name: Self-drilling Metal Butterfly Hollow Wall Anchor
Material: Made of high-quality carbon steel for durability
Standards: Compliant with GB, DIN, and ANSI standards
Grade: Available in 4.8 and 8.8 high strength grades
Sizes: M4, M5, M6 (ideal for drywall thicknesses ranging from 6mm to 13mm)
Surface Treatment: Finished with Golden Zinc Plated or Yellow Zinc for enhanced corrosion resistance
Design Features: Features a self-drilling serrated sharp tip, a self-tightening folding metal expansion arm, and a countersunk cross (or flange) design. Constructed with high-strength spring steel sheet bending and a high-gloss anti-corrosion color zinc coating.
Applications: Perfect for heavy-duty mounting on drywall/plasterboard, bathroom and kitchen hardware installation, interior partitions, ceiling installations, and lightweight electromechanical panel fixings.
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: Offered in boxed, bulk, or pallet packaging, with customizable options
OEM: Custom manufacturing options available
As a leading factory and supplier in China, we ensure high-quality products and reliable service to meet your needs.

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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
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    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
    🎨 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
    Self-Drilling Sharp Tip

    ⚡ Self-Drilling Sharp Tip – No Pre-Drilling

    Built-in sharp self-drilling serrated tip penetrates drywall/plasterboard directly – no pre-drilling or hammering needed, completing drilling and installation in one step with an electric driver. Ideal for large-area or overhead work, reducing tool changes and steps. Countersunk cross (or flange) design ensures flush surface or larger load distribution, neat and surface-friendly.

    Foldable Metal Wings

    🦋 Foldable Metal Expansion Wings

    Self-tightening foldable metal wings automatically expand into a butterfly shape after passing through the wall, closely hugging the back surface with a large bearing area that evenly distributes loads across drywall or partitions – effectively preventing local crushing or tearing. Made of high-strength spring steel with excellent elasticity, the wings self-lock after expansion.

    Zinc Coating

    🛡️ Bright Yellow Zinc Coating – Rust-Proof

    Carbon steel substrate with high-gloss yellow zinc plating – dense and uniform coating effectively resists moisture, dust, and mild corrosion, suitable for kitchens, bathrooms, and interior partitions. Wing and thread surfaces resist wear and abrasion, maintaining elastic deployment even after repeated use. Fatigue-tested to withstand static loads and light vibration.

    Factory Environment

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    High-Quality Product Display

    Frequently Asked Questions

    Q1: Do I need a drill bit to install these anchors?
    No, these anchors feature a self-drilling sharp tip designed to penetrate drywall and plasterboard directly using a standard electric driver.
    Q2: What materials are these screws made of?
    They are typically made of high-strength carbon steel with a bright yellow zinc coating, or high-grade 304 stainless steel depending on your specific requirements.
    Q3: How do the expansion wings provide extra security?
    Once the screw passes through the wall, the spring-loaded metal wings expand into a butterfly shape, distributing the load over a larger surface area to prevent pull-out.
    Q4: Are these screws suitable for humid environments like bathrooms?
    Yes, the yellow zinc coating provides excellent resistance to moisture and mild corrosion, making them ideal for interior partitions in kitchens and bathrooms.
    Q5: Can I request custom sizes or packaging?
    Absolutely. We offer flexible customization for head shapes, slot types, extra-long specifications, and personalized labeling/packaging.
    Q6: What is the benefit of the countersunk head design?
    The countersunk design allows the screw to sit flush with the surface of the drywall, providing a neat, professional finish for mounting hardware or panels.