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Self-Drilling Hollow Wall Anchor Butterfly Expansion Bolts for Drywall Fixing - China Suppliers & Factory Direct

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Introducing our Self-drilling Metal Butterfly Hollow Wall Anchor, expertly crafted by a leading China supplier and factory. Made from high-quality carbon steel, these anchors meet GB, DIN, and ANSI standards with grades 4.8 and 8.8 for exceptional strength. Available in sizes M4, M5, and M6, they are perfect for drywall thicknesses between 6mm and 13mm, Featuring a self-drilling serrated sharp tip and self-tightening folding metal expansion arm, our anchors also boast a countersunk cross (or flange) design. The high-strength spring steel sheet bending and high-gloss anti-corrosion color zinc coating enhance durability and functionality, Ideal for heavy-duty mounting on drywall/plasterboard, our anchors are perfect for installations of bathroom and kitchen hardware, interior partitions, ceiling installations, and lightweight electromechanical panel fixing, We guarantee timely delivery within 15-30 days after receiving advance payment from our valued customers. Proudly manufactured in China, our brand, JGD, offers a minimum order quantity of 10,000 pieces, which is negotiable. Sample availability, alongside various packaging options such as boxed, bulk, pallet, or customized packaging, ensures we meet your specific requirements. OEM services are also available to cater to your unique 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.
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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

    • 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

    • 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

    • 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

    • 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 – 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 – one person can finish batch fixing quickly.
    Self-Drilling Sharp Tip

    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 – even long-term mounting of bathroom hardware, cabinets, or light electrical panels stays secure without loosening or pullout.
    Foldable Metal Expansion Wings

    Bright Yellow Zinc Coating

    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 and thread locking even after repeated use. Fatigue-tested, this anchor withstands static loads and light vibration without failure – extremely low replacement frequency, offering excellent cost-performance.
    Bright Yellow Zinc Coating

    Factory Environment & Product Display

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    High-Quality Stainless Steel Self-Tapping Screw Display

    Frequently Asked Questions

    Do these self-drilling screws require a pilot hole?
    No, the built-in sharp self-drilling serrated tip is designed to penetrate drywall and plasterboard directly, saving time and effort during installation.
    What materials are used for the expansion wings?
    The wings are made of high-strength spring steel with excellent elasticity, ensuring they self-lock and provide a large bearing area after expansion.
    Is the yellow zinc coating suitable for humid environments?
    Yes, the dense and uniform yellow zinc plating effectively resists moisture and mild corrosion, making it suitable for kitchens and bathrooms.
    Can I order screws with custom head shapes or colors?
    Absolutely. We offer flexible customization for head/slot shapes, surface treatment colors, and personalized packaging to meet your specific requirements.
    How do you ensure the quality of each batch?
    Our quality control system includes raw material source locking, full traceability of furnace numbers, and real-time monitoring of salt spray tests.
    What technical support do you provide for large projects?
    We offer on-site failure analysis, selection calculations, BOM optimization, and guidance on installation tool selection to ensure project success.