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304 Stainless Steel Hex Sleeve Anchor Bolts - Heavy Duty Wall Anchors from China Suppliers and Factory

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Name: 304 Stainless Steel External Expansion Anchor Bolt
Material: Made from high-quality 304 Stainless Steel, offering an impressive ultimate tensile strength of ≥520MPa and yield strength of ≥205MPa
Standards: Compliant with ETAG 001, ASTM F1554, and GB/T 22795
Grade: Stainless Steel: A2-70, Carbon Steel: Grade 4.8 / Grade 8.8
Specifications: Available in sizes M6-M16 with lengths ranging from 60mm to 200mm (customization options available)
Surface Treatment: Stainless Steel features a mirror polished and passivated finish, ensuring acid and alkali resistance, as well as seawater corrosion resistance; Carbon Steel has a yellow zinc coating or blue-white zinc electroplating for enhanced rust-proof and wear-resistant properties.
Design Features: Engineered with a hexagonal nut for drive force, external expansion for sliding tension, and an extended tube design. High corrosion-resistant 304 stainless steel combined with a smooth tube body allows for effortless insertion.
Applications: Ideal for building structures and reinforcement, heavy equipment installation, outdoor safety protection facilities, aerated concrete blocks, thick wall applications, and industrial plants along with warehouse racking.
Delivery Time: 15-30 days post advance payment
Origin: Proudly manufactured in China
Brand: JGD
Minimum Order Quantity: 10,000 pieces, negotiable
Samples: Available for review
Packaging: Offered in boxed, bulk, pallet, or customized packaging
OEM: Available to meet specific needs
Looking for reliable suppliers and factory-direct pricing? Choose our 304 Stainless Steel External Expansion Anchor Bolts for quality and durability.

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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
    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.
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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

    Flexible 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
    304 Stainless Steel

    304 Stainless Steel – Corrosion & Aging Resistant

    Made of AISI 304 stainless steel (A2-70), with ultimate tensile ≥520MPa and yield ≥205MPa. Mirror-polished and passivated for a dense chromium oxide film that effectively resists acids, alkalis, seawater, and industrial pollutants. Ideal for coastal construction, outdoor safety facilities, and damp factories.

    External Sliding Expansion – Deep Anchoring

    The external sliding expansion mechanism – as the hex nut is tightened, the tapered screw expands the sleeve uniformly outward, gripping the hole wall 360° for high tensile and shear strength. Tailored for thick walls, aerated blocks, and insulated composite walls delivering anchoring depth far beyond ordinary bolts.

    External Sliding Expansion
    Fatigue Resistance

    Extended Design for Fatigue Resistance

    The extended sleeve not only increases anchoring depth but also disperses load stress, reducing edge concentration at the hole mouth and enhancing overall fatigue performance. Withstands alternating loads in heavy equipment, warehouse racking, and industrial plants – no shifting, no loosening.

    Factory Environment

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    Stainless Steel Self-Tapping Screw Display

    Frequently Asked Questions

    What are the main benefits of using 304 stainless steel for these screws?
    AISI 304 stainless steel offers exceptional corrosion and aging resistance. It forms a dense chromium oxide film that protects against acids, seawater, and industrial pollutants, ensuring a long service life even in damp or coastal environments.
    How does the external sliding expansion mechanism work?
    As the hex nut is tightened, the tapered screw expands the sleeve uniformly outward. This creates a 360° grip against the hole wall, providing superior tensile and shear strength compared to standard bolts.
    Can I request customized head shapes or materials?
    Yes, we offer flexible customization capabilities including specific head and slot shapes, special materials, extra-long specifications, and personalized packaging or labeling to meet your project requirements.
    Are these screws suitable for heavy industrial equipment?
    Absolutely. Our extended design is specifically engineered for fatigue resistance and can withstand alternating loads in heavy equipment and warehouse racking without shifting or loosening.
    What quality control measures are in place during manufacturing?
    We employ a comprehensive system including raw material source locking, full batch traceability, third-party certification, and real-time salt spray test monitoring to ensure international standard compliance.
    Do you provide technical support for installation?
    Yes, we offer on-site failure analysis, BOM optimization, and guidance on installation tool selection to ensure the most efficient and secure anchoring for your application.