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Heavy Duty Stainless Steel Turnbuckle Hook & Eye Rigging Screw 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.
Standards: Manufactured to meet ISO, GB/T 3818, GB/T 5975, DIN 1480, and US Federal Specification FF-T-791 standards.
Grade: Available in stainless steel A2-70 (30/ A4-80 (31and carbon steel grades 4.8 and 8.8.
Specifications: Offered in sizes M6 to M24, customizable to meet specific requirements.
Surface Treatment: Features natural polishing for corrosion resistance, with optional electro-galvanized or hot-dip galvanizing for enhanced rust resistance.
Design Features: This turnbuckle boasts a two-way adjustable structure, multiple end types, an open-body design for versatile applications, and is made from corrosion-resistant stainless steel with high tensile strength.
Applications: Ideal for outdoor engineering projects, marine engineering, building curtain walls, lifting and hoisting, and general assembly purposes.
Delivery Time: Typically 15-30 days after receiving advance payment, ensuring timely fulfillment.
Origin: Proudly manufactured in China, leveraging advanced technology and skilled labor.
Brand: JGD, a trusted name among suppliers.
Minimum Order Quantity: Starting from 10,000 pieces, negotiable depending on your needs.
Samples: Available for evaluation.
Packaging: Can be boxed, bulk packed, shipped on pallets, or customized according to client specifications.
OEM: Our factory provides OEM services to cater to diverse client requirements.

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    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws01
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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.
    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws01
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    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
    Stainless Steel Turnbuckle
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    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
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    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
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    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

    Q1: What materials are available for your turnbuckles?
    We offer AISI 304 and AISI 316 stainless steel for superior corrosion resistance, as well as galvanized carbon steel for high-strength industrial applications.
    Q2: Can these turnbuckles be used in marine environments?
    Yes, our AISI 316 stainless steel turnbuckles are specifically designed to resist salt spray and marine corrosion, making them ideal for boats and coastal projects.
    Q3: What range of sizes do you provide?
    Our standard production range covers sizes from M6 to M36, supporting various load requirements from light tensioning to over 15 tons of breaking load.
    Q4: Do you support customized specifications?
    Absolutely. We provide flexible customization for head shapes, slot types, special materials, and personalized packaging or labeling to meet your specific project needs.
    Q5: How do you ensure the quality of the products?
    Our quality control system includes raw material source locking, full batch traceability, third-party certification, and real-time salt spray test monitoring.
    Q6: Do you provide technical support for installation?
    Yes, we offer technical services including on-site failure analysis, selection calculations, BOM optimization, and guidance on installation tool selection.