Shackles
Chain Shackle, US Type Screw Pin D / Dee Shackle
A US type screw pin D shackle made from drop-forged super carbon steel body with an alloy steel screw pin, designed for lifting and rigging applications. It features a 4:1 or 6:1 safety factor, hot dipped galvanized, powder coated or zinc plated finish, and a working load limit embossed on the body. Sizes range from 3/16" to 2-1/2" nominal working load, with dimensions and tolerances specified per standard.
- Size
- From 3/16"to 2-1/2" WLL ,Size embossed on each shackle
- Material
- Body-Super Carbon Steel. Screw Pin-Alloy Steel
- Finish
- Body-Hot Dipped Galvanized / Powder Coated / Zinc Plated
- Packing
- Cartons or Gunny Bags and then on Pallets
- Catalogue Family
- Shackles
- Certificates
- EN 10204 3.1 material test certificate on request
CAD files are supplied on request via WhatsApp or email rather than published for open download.
Key Benefits
What Chain Shackle Gives You
- Drop-forged super carbon steel body provides high strength and impact resistance for repeated lifting cycles
- Alloy steel screw pin with nut ensures secure locking under dynamic load and vibration
- 4:1 or 6:1 safety factor depending on application, with minimum breaking load four or six times the safe working load
- Hot dipped galvanized, powder coated or zinc plated finish resists corrosion in marine, outdoor and industrial environments
- Working load limit embossed on the body for traceability and field verification
- Standardized dimensions and tolerances ensure compatibility with chains, ropes and slings across rigging systems
- Screw pin design allows for easy installation and removal with hand tools in field conditions
Application Scenarios
Where Chain Shackle Is Used
- Marine and offshore rigging where saltwater exposure demands corrosion-resistant finishes
- Construction site lifting operations using chain systems with frequent repositioning
- Off-road recovery setups where shackles are exposed to mud, dust and impact
- Industrial maintenance where rigging points must be quickly assembled and disassembled
- Port and logistics handling of heavy cargo with chain-based lifting systems
- Manufacturing plant rigging for moving heavy machinery and structural components
Who It Is For
Buyers This Product Is Built For
- Marine equipment suppliers specifying corrosion-resistant shackles for mooring and anchoring
- Construction contractors sourcing reliable rigging hardware for crane and chain lifts
- Off-road recovery kit manufacturers building winch and chain systems for 4x4 vehicles
- Industrial maintenance teams needing durable, field-serviceable shackles for plant operations
- Logistics and port operators managing container and cargo handling with chain-based systems
- Rigging distributors carrying a full range of shackles who need consistent quality and traceability
Problems It Solves
Problems This Product Removes
- Corrosion damage on shackles used in wet or salty environments due to lack of proper surface treatment
- Pin loosening under vibration during lifting or towing operations
- Inconsistent safety factors across different shackle brands leading to overloading risks
- Lack of traceability when the working load limit is not clearly marked on the shackle
- Incompatibility between shackles and chains due to non-standardized dimensions
- Buying shackles from multiple suppliers for different sizes and finishes, increasing procurement complexity
Technical Features
Technical Features
- Drop-forged super carbon steel body with quench and temper heat treatment
- Alloy steel screw pin with nut for secure locking under dynamic load
- 4:1 or 6:1 safety factor depending on product variant, with minimum breaking load four or six times the safe working load
- Working load limit embossed on the body for field identification
- Hot dipped galvanized, powder coated or zinc plated finish for corrosion resistance
- Standardized dimensions A, B, C, E, G, K, and tolerance values per size
- Screw pin design with threaded engagement and nut locking mechanism
Specifications
Chain Shackle Specifications
Values published in the Kailipu catalogue for this item. Anything not listed is available on request.
| Capacity Range | 3/16” to 2-1/2” nominal working load |
|---|---|
| Material Body | Super carbon steel drop forged and quenched tempered |
| Material Pin | Alloy steel screw pin with nut |
| Safety Factor | 4:1 or 6:1 standard |
| Surface Finish | Hot dipped galvanized powder coated or zinc plated |
| WLL Marking | Embossed on body for traceability |
| Dimensions | A, B, C, E, G, K as per size table with tolerance +0.06 to +0.25 in |
| Tolerance | +/- 0.06 to +0.25 in depending on size |
Full size table on request. The catalogue publishes a full dimension and capacity table for this item. Ask on WhatsApp or by email and we will send it as a PDF.
Materials
Materials And Finishes
- Super carbon steel body drop forged and quenched tempered for high tensile strength
- Alloy steel screw pin for enhanced fatigue resistance and secure locking
- Hot dipped galvanized coating for long-term corrosion protection in harsh environments
- Powder coat finish for abrasion resistance and visual identification
- Zinc plated layer for moderate corrosion resistance and cost-effective finish
Manufacturing Process
How This Product Is Made
1Drop forging of the U-shaped body and screw pin blanks
2Quench and temper heat treatment of the body and pin for hardness and toughness
3Machining of the body threads and pin threads
4Assembly of the screw pin and nut
5Surface finishing by hot dipped galvanizing, powder coating or zinc plating
6Embossing of the working load limit and size on the body
7Proof load testing and final inspection before packing
Quality Control
Quality Control On Every Batch
- Proof load test on production batches before release
- Dimensional tolerance check against published size table
- Breaking strength validation to confirm 4:1 or 6:1 safety factor
- Visual and tactile inspection for surface defects and finish uniformity
- Material Test Certificate to EN 10204 3.1 issued with the order on request
- Third-party inspection accepted at the Qingdao warehouse before shipment
Customisation
Customisation Options
- Custom tonnage stamping on the body for specific load ratings
- Private label and OEM marking available for brand integration
- Finish to order in hot dipped galvanized, powder coated or zinc plated
- Sizes and dimensions built to a supplied drawing or specification
- Packing configuration adjusted for carton count, pallet pattern and warehouse handling
Compare
How It Compares With The Alternatives
An honest read on where this pattern wins and where another one would serve you better.
| Alternative | Honest Trade Off |
|---|---|
| Screw pin shackle with cotter pin | The nut and screw pin design allows for easier field adjustment and does not require a separate cotter pin, reducing risk of loss or misalignment |
| Bolt pin shackle | The screw pin design is faster to install and remove in the field but may have lower resistance to lateral shear compared to a bolt pin with nut and cotter |
| Rigid shackle with no pin | The screw pin version allows for disassembly and reassembly, while a rigid shackle is permanent and cannot be reused |
| Welded shackle | Drop-forged construction provides better impact resistance and fatigue life than a welded shackle, which may have stress concentrations at the weld point |
Use Guide
How To Use And Inspect Chain Shackle
- Match the embossed working load limit to the calculated load, not the equipment rating
- Ensure the screw pin is fully threaded and the nut is tightened to prevent loosening
- Inspect the body and pin for deformation, cracks or thread damage before each use
- Check that the finish is intact; repair or replace if corrosion is visible
- Do not exceed the specified tolerance on dimensions during installation
- Retire the shackle if the body shows permanent deformation, the pin is stripped, or the marking is illegible
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Answers
Chain Shackle FAQ
What safety factor do these shackles carry?
A standard 4:1 or 6:1 safety factor, depending on the product variant. The minimum breaking load is four or six times the stated safe working load.
Is the working load limit marked on the shackle?
Yes. The safe working load is embossed on the body for traceability and field verification.
What finishes are available?
Options include hot dipped galvanized, powder coated, and zinc plated. Custom finishes are available on request.
Can you supply Material Test Certificates?
Yes. A Material Test Certificate to EN 10204 3.1 is supplied with the order on request.
Are these shackles drop forged?
Yes. The body and pin are drop forged from super carbon steel and quenched and tempered for strength and toughness.
How are they packed for export?
Cartons or gunny bags on pallets. We can configure the packing to suit your warehouse or retail requirements.
Can you custom stamp a different tonnage or brand?
Yes. Custom tonnage stamping, private label marking, and OEM packing are standard options.
Need A Quote On Chain Shackle
Send the sizes, the finish and the quantity on WhatsApp or by email. You get a priced reply within 24 hours and a straight answer on stock.
We reply within 24 hours on WhatsApp or by email. Send a drawing, a photo or a bill of materials and we will quote it as it stands.