Stainless Steel Turnbuckle Hook & Eye Type Heavy Duty Wire Rope Tensioner Rigging Screw for Marine Shade Sail & Construction

Name: Stainless Steel Turnbuckle (Turnbuckle / Rigging Screw)
Material: AISI 304/316 stainless steel (corrosion resistant, rust resistant), Q235 carbon steel
Standards: ISO, GB/T 3818, GB/T 5975, DIN 1480, US Federal Specification FF-T-791
Grade: Stainless steel A2-70 (304) / A4-80 (316), Carbon steel 4.8 grade / 8.8 grade
Specifications: M6-M24 (customizable)
Surface Treatment: Natural polishing (no additional coating, corrosion resistant), electro-galvanized / Hot-dip galvanizing (optional, enhanced rust resistance)
Design Features: Two-way adjustable structure, multiple end types available, open-body structure, corrosion-resistant stainless steel, high tensile strength
Applications: Outdoor engineering, marine engineering, building curtain walls, lifting and hoisting, general assembly
Delivery Time: 15-30 days after receiving advance payment
Origin: China
Brand: JGD
Minimum Order Quantity: 10,000 pieces, negotiable
Samples: Available
Packaging: Boxed/Bulk/Pallet or customized packaging
OEM: Available

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Key Features

Our stainless steel turnbuckles (also known as rigging screws, open body turnbuckles, or wire rope tensioners) are available in AISI 304/316 stainless steel (A2-70/A4-80) and carbon steel Q235 (Grade 4.8/8.8). The dual‑thread adjustment design allows the central open body to be rotated, extending or retracting both threaded ends simultaneously for precise tensioning of ropes, cables, or tie rods. Various end configurations are offered: hook & hook, hook & eye, eye & eye, and fork ends – suitable for marine mooring, shade sail guy lines, curtain wall tie rods, and lifting applications. Size range M6 to M36, with breaking loads up to 15+ tonnes. Installation requires no tools – manual rotation provides quick tensioning.

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Precision Manufacturing Process

We use hot die forging: AISI 304/316 or Q235 round steel is heated to 1200°C and formed in a die forging press into left/right threaded ends and the open body in one stroke, ensuring continuous metal flow and eliminating cracks. Precision thread rolling using carbide dies (±0.005mm accuracy) produces fine or coarse threads, increasing fatigue strength by 25% compared to cutting. Stainless steel parts undergo solution treatment + electrolytic polishing to eliminate intergranular corrosion; carbon steel parts receive mesh belt furnace quenching + tempering (Grade 8.8: HV 250-320), followed by electro‑galvanizing or hot‑dip galvanizing (salt spray ≥500h). Every batch is inspected by magnetic particle testing and tensile breaking tests, ensuring a safety factor ≥4 times the working load.

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Transparency & Customization

Each batch of turnbuckles comes with a full inspection report (material spectroscopy, hardness, breaking load, salt spray duration). The package QR code traces back to the original heat number, forging batch, and operator. Our website shows forging workshop videos and typical failure cases (e.g., overload fracture, thread stripping).

Customization options: Accept non‑standard end types (e.g., hook with safety catch, welded lug plate), extended or reduced body length, mixed standards (DIN + GB). Surface treatment offers a “marine package”: 316 substrate + partial tin plating to prevent galvanic corrosion.

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Two-way Adjustment · Precise Tension

Made of 304/316 stainless steel, A4 grade corrosion resistant. Multiple end types including hook eye/hook; tension can be adjusted by rotating the body. Used for ship mooring, sunshade sail stay cables, and construction tie rods. M6-M36, breaking strength exceeding 15 tons, tool-free quick tightening.

product details

JGD Service

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

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.

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.

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

High-Quality Stainless Steel Turnbuckle Display

Precision Fastening, Engineered for the Future – Chengdu Jingguda Trading Co., Ltd., Your Trusted High-Quality Fastener Expert

Chengdu Jingguda Trading Co., Ltd. is a professional fastener manufacturer integrating R&D, production, and sales. We specialize in high-precision, high-strength bolts, nuts, washers, and non-standard customized fasteners, covering international standards such as GB, DIN, ISO, ANSI, and ASME. Equipped with multi-station cold heading machines, high-speed thread rolling machines, fully automated heat treatment lines, and surface treatment equipment, we also operate an in-house laboratory featuring spectrometers, hardness testers, tensile testing machines, and salt spray testers to ensure strict quality control from raw materials to finished products. Our products are widely used in industrial machinery, renewable energy, automotive manufacturing, rail transportation, and more, known for their precision, corrosion resistance, and durability. Committed to “Fast Delivery, Professional Support,” we provide one-on-one customized solutions and efficient logistics, striving to be your ideal partner for reliable connections.

Industrial Capabilities

• Factory Area: 8,000 square meters

• Certifications: ISO, IATF, CE, RoHS, JIS, ASTM

• Manufacturing : 70+ internationally advanced production lines

• Testing: 30+ sets of precision quality testing equipment

• Annual Output: Up to 50,000,000 tons

From Raw Materials to Final Products

Our factory's fully automated production lines for cold heading, precision thread rolling, controlled-atmosphere heat treatment, and environmentally friendly surface finishing enable closed-loop manufacturing from raw material to finished product. Thanks to inline optical sorting and a digital MES, each fastener meets stringent specifications for strength, accuracy, and surface quality. You guarantee high-quality fasteners that are dependable, efficient, and eco-friendly.

Lab for Innovation:

Are you working on a project? Let's get started right away. We are always looking for new ideas, and expertise and teamwork are what propel our progress. Do you have a project underway? Now let's get going.

The Full Joint R&D Process: "Customized Implementation" to "Pain Point Diagnosis"

We provide more than standard parts. From the beginning of your project, our multicultural engineering team actively collaborates. We thoroughly analyze the application context and customize solutions in the lab, seamlessly merging technology and application, to guarantee that innovative ideas are quickly transformed into practical solutions that reduce overall lifecycle costs.

Integrated Verification System: Using "Test Data" to Assure Innovation

The drawing board is not the end of the creative process. We offer one-stop verification for everything from corrosion testing to prototype development through our internal technical center. We employ empirical data to verify the performance stability of customized solutions through comprehensive simulated working condition tests. In addition to achieving genuinely dependable cost reduction and efficiency improvement, this considerably lowers project risks.

Rapid Service Response

Utilizing self-developed molds and flexible manufacturing lines to finish sample and delivery within 7 days, intelligently schedule production utilizing digital quality control and agile supply chains to cut bulk order delivery time by 30% after confirmation. With our "Demand-Solution-Sampling-Production" closed-loop technology, you may profit from market opportunities for both standard bolts and custom-shaped parts.