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304 Stainless Steel Expansion Eye Bolt - Heavy Duty Lifting Anchor Bolt from China Suppliers & Factory, Ideal for Marine & Hammock Use

Name: Expansion Bolt with Ring (Expansion Eye Bolt / Lifting Expansion Anchor with Ring)
Material: AISI 304 Stainless Steel (Corrosion Resistant, Rust-Proof), Q235 Carbon Steel
Standards: GB/T 22795, ETAG 001
Grade: A2-70 (304 Stainless Steel), Grade 4.8 / Grade 8.8 (Optional Carbon Steel, Aluminum)
Specifications: M6-M20 (Customizable Sizes Available)
Surface Treatment: Natural Polishing / Passivation (No Coating for Corrosion Resistance), Electro-galvanizing / Hot-Dip Galvanizing (Optional for Carbon Steel, Enhancing Rust Resistance)
Design Features: Integrated Eye Structure, Expansion Fixing Principle, Stainless Steel Corrosion Resistance, Multiple Specifications Available, Easy Installation
Applications: Ideal for Outdoor Leisure, Lifting and Hoisting, Construction Engineering, Shipbuilding and Marine Industries, General Assembly
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: Available in Boxed/Bulk/Pallet or Customized Options
OEM: Available for Custom Orders
As a trusted supplier and factory in China, we ensure high-quality Expansion Bolts with Rings for diverse industrial applications.

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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.

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.

Intelligent Warehousing Services for Fasteners

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 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

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

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FEATURE 01

Dual Material Options, Corrosion Resistant & Durable for Multiple Conditions

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 with customizable inner ring diameter, fitting construction, lifting and leisure facilities with stable load capacity and long service life.

FEATURE 02

Integrated Eye Ring & Expansion Anchor Design, Stable Load Bearing & High Safety

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, construction hoisting and marine mooring. It bears uniform force, resists vibration and loosening, ensuring high safety factor for heavy-duty fastening.

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FEATURE 03

Easy Installation Without Embedding, High Efficiency & Wide Versatility

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 and tool-free mounting support fast on-site installation. As a direct factory supply with custom service available, it meets various engineering and daily fastening demands perfectly.

Application Scenarios

High-Quality Expansion Eye Bolt Display

Frequently Asked Questions (FAQ)

Q What materials are available for the expansion eye bolts?

We supply AISI 304 stainless steel (A2-70 grade) with natural corrosion resistance and Q235 carbon steel (4.8 / 8.8 grade) with electro-galvanized or hot-dip galvanized finishes for diverse operational environments.

Q Which industry standards do these anchor bolts comply with?

Our expansion eye bolts comply with national and international fastener standards including GB/T 22795 and ETAG 001 guidelines to guarantee safety and high load-bearing reliability.

Q How do you install the expansion eye bolts into concrete?

Installation is simple and requires no pre-embedding: drill a hole in the concrete base, clean debris from the hole, insert the expansion anchor sleeve, and tighten the nut until fully expanded against the concrete wall.

Q What standard sizes and custom specifications are offered?

Standard metric sizes range from M6 to M20. We also provide flexible customization for head/slot shapes, special alloy materials, extended lengths, customized inner ring diameters, surface treatments, and personalized packaging.

Q What are the primary applications for these fasteners?

They are widely utilized for heavy lifting points, concrete structural anchoring, marine mooring, hammock and shade sail fixtures, outdoor leisure installations, and general mechanical hoisting.

Q How is product quality ensured during manufacturing?

Quality is managed through raw material locking, furnace number batch traceability, micron-level thread rolling, real-time salt spray monitoring, 100% optical sorting, and joint laboratory metallographic/mechanical testing.