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304 Stainless Steel Expansion Eye Bolt - Heavy Duty Lifting Anchor from China Suppliers & Factory for Marine Applications

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Name: Expansion Bolt with Ring (Expansion Eye Bolt / Lifting Expansion Anchor with Ring)
Material: Premium AISI 304 Stainless Steel (Corrosion Resistant, Rust-Proof) and Q235 Carbon Steel
Standards: Compliant with GB/T 22795 and ETAG 001
Grade: A2-70 (304 Stainless Steel), Grade 4.8 / Grade 8.8 (Optional for Carbon Steel and Aluminum)
Specifications: Available in sizes M6-M20 (Customizable options offered)
Surface Treatment: Features Natural Polishing / Passivation for corrosion resistance; Electro-galvanizing / Hot-Dip Galvanizing options for Carbon Steel to enhance rust resistance
Design Features: Innovative Integrated Eye Structure and Expansion Fixing Principle ensuring strong and secure usage; Stainless steel corrosion resistance with multiple specifications available for easy installation
Applications: Ideal for outdoor leisure, lifting and hoisting, construction engineering, shipbuilding, marine applications, and general assembly
Delivery Time: Prompt delivery within 15-30 days after receiving advance payment
Origin: Manufactured in China
Brand: JGD
Minimum Order Quantity: 10,000 pieces (Negotiable)
Samples: Available upon request
Packaging: Choices include Boxed, Bulk, Pallet, or Custom Packaging options
OEM Services: Available for personalized solutions
As a leading supplier and factory in China, we ensure high-quality products to meet your lifting and anchoring needs.

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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
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    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
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    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
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    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
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    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
    Dual Material Options

    Dual Material Options, Corrosion Resistant & Durable

    Our expansion eye bolts are available in AISI 304 stainless steel A2-70 grade and Q235 carbon steel 4.8/8.8 grade. The stainless steel version is polished and passivated with natural rust-proof performance, perfectly suitable for humid outdoor and marine salt spray environments. Carbon steel can be electro-galvanized or hot-dip galvanized for stronger anti-rust protection. Sizes range from M6 to M20.

    Integrated Eye Ring Design

    Integrated Eye Ring & Expansion Anchor Design

    Adopting one-piece eye ring structure without welding breakpoints for superior tensile strength. Based on expansion anchoring principle, the sleeve expands tightly against concrete wall when tightening the nut to prevent slipping. Compliant with GB/T 22795 and ETAG 001 standards, it is ideal for concrete lifting points, hammock anchors, and construction hoisting.

    Easy Installation

    Easy Installation Without Embedding, High Efficiency

    Simple installation requires only drilling, hole cleaning, inserting the anchor and tightening the nut, with no pre-embedding needed to save construction time and labor costs. Widely applicable to construction anchoring, heavy lifting points, outdoor leisure, marine equipment and general mechanical assembly. Complete specifications support fast on-site installation.

    Application Scenarios

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    High-Quality Expansion Eye Bolt Display

    Frequently Asked Questions
    ❓ What materials are available for your expansion eye bolts?
    We provide AISI 304 stainless steel (A2-70) for superior corrosion resistance and Q235 carbon steel (4.8/8.8 grade) with galvanized finishes for heavy-duty industrial use.
    ❓ Are these bolts suitable for marine environments?
    Yes, our 304 stainless steel expansion eye bolts are polished and passivated, making them ideal for high-moisture and marine salt spray environments.
    ❓ What international standards do your products comply with?
    Our expansion eye bolts are manufactured in compliance with GB/T 22795 and ETAG 001 standards, ensuring safety and reliability for construction and lifting.
    ❓ Can I customize the dimensions or packaging?
    Absolutely. We offer flexible customization for inner ring diameters, thread lengths, special materials, and personalized labeling or packaging to meet your specific project needs.
    ❓ How do I install an expansion eye bolt correctly?
    The process is simple: drill a hole in the concrete, clean the debris, insert the expansion anchor, and tighten the nut. The sleeve will expand against the wall to create a secure, high-load anchor point.