The D-Ring is a widely used heavy-duty lashing component for marine, land transportation, cargo securing, and container handling systems. It is especially suited for applications requiring strong tensile connections.

At OLIPORTS, we supply heavy duty d rings designed for the toughest cargo lashing conditions. Whether you’re securing containers at sea, tying down cargo on trucks, or anchoring heavy equipment, our forged cargo d ring systems provide unmatched reliability and strength.

We offer two load-rated options:

• 36-ton d ring lashing fitting with dovetail base
• 50-ton d ring lashing fitting available in both dovetail base and breech base configurations

All our rings are tested for high tensile loads and built with forged steel to meet international standards for marine and container transport.

With these two capacity options, customers can select the optimal product to meet different cargo securing demands, ensuring a safe and efficient transportation process.

Compact, durable, and fully ISO-compliant, this fitting is essential for standardized container lashing and securing systems on modern vessels.

Available Options: 36T and 50T Dovertail Base D Ring

36T D Ring Dovetail 55° Base

Technical Specification of 36Ton D-Ring 55 Degree Dovetail Base AL-K1/36T

• Model: AL-K1/36T
• Weight: 7.2 kg
• SWL: 180 kN; Breaking Load: 360 kN
• Material: Forged Steel
• Surface: Heat treated + shot blasted
• Finish: Shop Primer
• Class Approval: ABS, DNV-GL, CCS, Others
• Category: Fixed Fittings on Deck
• Tags: Weldable D-Ring, Cabin Fixtures, D Ring, Dovetail Base,

* Can be customized according to your needs, type and test class approved on request. Please contact us

Drawings and Features of Turnfoot D-Ring 36Ton

Key Features

This 36-ton dovetail D ring features a 55-degree mounting base, making it ideal for light-to-medium cargo securing tasks in containers, trailers, and offshore platforms. Engineered for stable lashing with moderate load-bearing needs, it’s a cost-effective and space-efficient solution for industrial tie-down applications.

• Forged steel construction ensures long-term safety and durability;
• Ideal for medium to heavy-duty lashing requirements;
• Shop primer finish provides basic anti-corrosion protection.
• Heat-treated and shot-blasted surface – Improves corrosion resistance and service life
• Compliant with ISO/EN lashing standards – Suitable for international shipping and securing systems
• Customizable sizes and finishes available – Meets diverse installation and engineering requirements

50T D Ring Lashing Breech Base

Technical Specification of 50Ton D-Ring 55 Degree Dovetail Base AL-K1/36T

• Model: AL-K1/50T
• Weight: 8.2 kg
• Safe Working Load : 250 kN; Breaking Load: 500 kN;
• Material: Forged Steel
• Surface: Heat treated + shot blasted
• Finish: Shop Primer
• Installation: Welding on ship deck
• Class Approval: ABS, DNV-GL, CCS, Others
• Category: Weldable D-Ring, Cabin Fixtures, Fixed Fittings on Deck.
• Tags: D-Ring, Turnfoot D-Ring, cargo D Ring, Breech Base,

* Can be customized according to your needs, type and test class approved on request. Please contact us

Drawings and Features of Heavy D-Ring Lashing 50Ton

Key Features

Designed for high-load operations, this 50-ton heavy duty D ring with a 55-degree dovetail base delivers maximum strength and secure anchoring. Commonly used in heavy-duty transport, marine vessels, and port equipment, it ensures reliable performance under extreme working conditions.

• Thicker ring (Ø16mm) for higher tensile performance;
• Taller ring height (92mm) fits a wider range of lashings;
• Wider base width (220mm) provides enhanced stability;
• Perfect for heavy-duty equipment and oversized container transport.
• Easy to weld and install – Curved base design provides flexibility during mounting
• Cost-effective and versatile – A practical solution for medium-to-heavy lifting and lashing operations

Applications Scenarios of Heavy Duty D Rings

Marine & Offshore Equipment Securing

Heavy duty container d rings are widely used on ships, barges, and offshore platforms for securing containers, equipment, or modular cargo during harsh sea transport. The dovetail base or breech base design ensures fast anchoring on vessel decks and underdeck structures.

• Often used in offshore oil & gas, wind energy components, pipe racks, and modular container buildings.

Port Terminal Container Operations

Used as container d ring fittings on port floors, twistlock foundations, or lashing bridges. 36T type is suited for standard containers, while 50T turnfoot d ring offers superior strength for heavy-duty units or breakbulk.

Land Freight & Trailer Lashing

Ideal cargo d ring solution for trailers, flatbeds, or railcars. Welded or bolted heavy duty d rings secure large cargo, steel coils, machinery, or construction components.

Heavy Lifting & Construction Sites

Forged steel d rings act as certified lifting points or tie-downs on job sites. Compatible with cranes and chain systems, these rings prevent load shift and ensure safety.

Modular Transport & Project Cargo

Custom-angle dovetail base d rings (e.g. 55°, 60°, or 75°) are integrated into steel skid bases or heavy transport frames. Used in moving offshore modules, energy equipment, or heavy steel parts.

Recommendation: For loads under 30 tons or where space is limited, the 36T model is preferred. For heavy-duty use or higher safety margins, choose the 50T version.

Flexible Dovetail Base Angles Available – 55°, 60°, 75° and Custom Options

To meet different installation environments and structural requirements, OLIPORTS’ heavy duty d rings with dovetail base can be manufactured in various fixed angles, including 55°, 60°, and 75°. These variations ensure compatibility with a wide range of deck fittings, container floors, and custom cargo systems.

For special applications, we also provide custom angle machining and drawing support based on customer layout and base slot geometry. Whether you’re upgrading a vessel system or building a modular transport structure, we deliver precision-fit solutions for your lashing points.

✅ Popular angles: 55° (standard), 60° (rail & ship deck), 75° (deep groove mount)

With over a decade of manufacturing and global distribution experience, OLIPORTS has developed deep expertise in container lashing and cargo securing systems. We fully understand the design drawings, structural layouts, and mechanical calculations behind every container ship’s securing solution — allowing us to respond quickly and accurately to your technical requirements.

• Deep understanding of ship lashing plans and design drawings
• Support for custom layouts to match your vessel and route
• ISO-compliant and class-approved products with full documentation
• Fast quote turnaround and fewer sample revisions
• Trusted by yards, shipowners, and retrofit contractors worldwide

Built to perform. Certified to last. Delivered on time.