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Heavy Duty Stainless Steel Turnbuckle Hook & Eye Tensioner from China Suppliers & Factory for Marine and Construction

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Name: Stainless Steel Turnbuckle (Turnbuckle / Rigging Screw)
, Material: Made from high-quality AISI 304/316 stainless steel, ensuring excellent corrosion and rust resistance, along with Q235 carbon steel for added durability.
, Standards: Manufactured in accordance with ISO, GB/T 3818, GB/T 5975, DIN 1480, and US Federal Specification FF-T-791.
, Grade: Available in stainless steel grades A2-70 (30and A4-80 (316), along with carbon steel grades 4.8 and 8.8.
, Specifications: Range from M6 to M24 with customization options available to meet specific requirements.
, Surface Treatment: Features natural polishing for corrosion resistance, with optional electro-galvanized or hot-dip galvanizing for enhanced rust protection.
, Design Features: Two-way adjustable structure for versatile applications, multiple end types available, open-body design, constructed from corrosion-resistant stainless steel, and engineered for high tensile strength.
, Applications: Ideal for outdoor engineering, marine engineering, building curtain walls, lifting and hoisting, and general assembly tasks.
, Delivery Time: Typically 15-30 days after receipt of advance payment.
, Origin: Proudly manufactured in China by trusted suppliers and factory specialists.
, Brand: JGD
, Minimum Order Quantity: 10,000 pieces, negotiable based on customer needs.
, Samples: Available upon request.
, Packaging: Options include boxed, bulk, pallet, or customized packaging to suit your preferences.
, OEM: Custom OEM services available.

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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

    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
    Stainless Steel Turnbuckle

    Multi-Material & Full-Size for Corrosion Resistance & Durability

    Available in AISI 304/316 stainless steel and carbon steel series. The 316 version resists salt spray corrosion, while carbon steel can be galvanized for enhanced rust protection. Sizes range from M6 to M36 with a breaking load of over 15 tons, suitable for marine, outdoor, and construction applications for long-lasting tension control.

    Adjustment Design

    Bidirectional Adjustment Design for Easy & Efficient Operation

    The open-body bidirectional design allows synchronous screw expansion/contraction by rotating the central body, enabling precise tension adjustment. Multiple end types (hook-hook, hook-eye, etc.) are available to fit various connections. Manual tightening without tools significantly improves construction efficiency.

    Stable Structure

    High-Tension Stable Structure for Safety & Reliability

    The one-piece open body and high-strength threads ensure stable tensile performance, resisting loosening under long-term dynamic loads. Stainless steel versions have no coating contamination, suitable for humid and salt spray environments; galvanized carbon steel options offer excellent rust resistance for lifting, curtain wall, and marine applications with sufficient safety redundancy.

    Application Scenarios

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    High-Quality Stainless Steel Turnbuckle Display

    Frequently Asked Questions

    What materials are available for the turnbuckles?
    We offer AISI 304 and 316 stainless steel for superior corrosion resistance, as well as galvanized carbon steel for cost-effective heavy-duty applications.
    How do I choose between Hook-Hook and Hook-Eye types?
    Hook-Hook is ideal for temporary connections that need frequent disassembly, while Hook-Eye provides more security for permanent attachments where one end is fixed.
    What is the maximum load capacity available?
    Our large-specification turnbuckles (up to M36) are designed to handle breaking loads exceeding 15 tons, depending on the material and thread size.
    Are your products compliant with international standards?
    Yes, our manufacturing process follows strict international standards, and we provide full material traceability and third-party certification upon request.
    Do you offer customization for specific application needs?
    Absolutely. We can customize head shapes, special materials, extra-long specifications, and personalized packaging to meet your project requirements.
    How does the bidirectional adjustment work?
    The central body features opposite-handed threads at each end. Rotating the body in one direction pulls the screws together (tightening), while rotating it the other way pushes them apart (loosening).