Shackles
Stainless Steel D Shackle
A D-shaped shackle made from stainless steel with a threaded pin for secure closure. Designed for marine, rigging, and lifting applications where corrosion resistance is critical. Available in sizes M5 to M50 with working load limits from 80 kg to 8000 kg. The D shape provides a larger opening for easy attachment of ropes, chains, or straps. Standard safety factor of 3:1. Supplied with electric galvanized finish or as plain stainless steel.
- Size
- M5-M50 Package: Carton/Gunny bag/Pallet / As customer's requirements
- Material
- Carbon Steel or Stainless Steel Process: Free Forging Surface: Electric galvanized
- 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 Stainless Steel D Shackle Gives You
- Stainless steel construction resists corrosion in saltwater, high humidity, and outdoor environments
- D-shaped body offers a larger opening than other shackle types for easier rope or chain attachment
- Threaded pin allows the shackle to open and close securely without requiring a separate pin tool
- 3:1 safety factor ensures reliable performance under dynamic and static loads
- Electric galvanized finish enhances surface protection and extends service life in harsh conditions
- Available in sizes from M5 to M50 to match a wide range of rigging and lifting tasks
- No need to carry multiple shackle types when working in corrosive environments
Application Scenarios
Where Stainless Steel D Shackle Is Used
- Marine vessel mooring and anchoring where exposure to saltwater is constant
- Offshore platform rigging and temporary lifting in coastal or offshore conditions
- Outdoor crane operations in humid or coastal industrial zones
- Fishing gear and net handling systems exposed to seawater and weather
- Transport and logistics setups where equipment must endure long-term outdoor storage
- Industrial rigging in chemical plants or food processing facilities with high moisture or cleaning exposure
- Temporary structures and scaffolding in seaside or high-humidity environments
Who It Is For
Buyers This Product Is Built For
- Marine equipment suppliers specifying corrosion-resistant rigging for boats and ships
- Offshore project contractors needing durable shackles for offshore lifting and mooring
- Rigging contractors working on coastal or marine infrastructure projects
- Fishing fleet operators maintaining gear that sees constant saltwater exposure
- Industrial maintenance teams in humid or wet environments requiring long-life hardware
- Logistics providers managing outdoor cargo securing systems in tropical or coastal regions
- Rigging distributors stocking corrosion-resistant shackles for marine and outdoor use
Problems It Solves
Problems This Product Removes
- Rust and degradation of carbon steel shackles in saltwater or high-moisture environments
- Difficulty attaching or removing ropes and chains due to narrow openings in other shackle types
- Need to replace shackles frequently in corrosive conditions, increasing maintenance cost
- Lack of a single shackle type that combines corrosion resistance with a large opening
- Inconsistent safety margins when using unmarked or uncertified shackles in critical lifts
- Multiple shackle types required for different environments, increasing inventory complexity
- Pin loosening under vibration in dynamic lifting or towing operations
Technical Features
Technical Features
- D-shaped body made from stainless steel for corrosion resistance
- Threaded pin with nut for secure closure and field adjustability
- 3:1 safety factor applied to all sizes unless otherwise specified
- Electric galvanized finish standard; plain stainless steel available on request
- Working load limit stamped on the body for traceability and compliance
- Dimensions: d (pin diameter), D (body width), a (height), c (pin length), b (body thickness)
- Sizes range from M5 to M50 with WLL from 80 kg to 8000 kg
- Free-forged construction for improved strength and grain structure
Specifications
Stainless Steel D Shackle Specifications
Values published in the Kailipu catalogue for this item. Anything not listed is available on request.
| Material | Stainless steel or carbon steel |
|---|---|
| Process | Free forging |
| Surface Finish | Electric galvanized or plain stainless steel |
| Safety Factor | 3:1 minimum |
| Capacity Range | 80 kg to 8000 kg safe working load |
| Size Range | M5 to M50 |
| D Dimensions | 5 mm to 50 mm |
| d Dimensions | 5 mm to 50 mm |
| a Dimensions | 10 mm to 102 mm |
| c Dimensions | 19 mm to 200 mm |
| b Dimensions | 11 mm to 108 mm |
| Weight per 100 pcs | 1.9 kg to 1,750 kg |
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
- Stainless steel body with high resistance to oxidation and chloride attack
- Carbon steel option available for non-corrosive environments
- Electric galvanized coating applied to improve surface durability and corrosion resistance
- Threaded pin made from heat-treated steel for strength and thread integrity
- Finish selected based on application: galvanized for outdoor use, plain stainless for high-corrosion areas
Manufacturing Process
How This Product Is Made
1Free forging of the D-shaped body and pin blanks
2Heat treatment to improve strength and grain structure
3Machining of the pin thread and body bore
4Assembly of the threaded pin and nut
5Surface treatment via electric galvanizing or plain finishing
6Stamping of working load limit and size markings
7Proof load testing and inspection before packing
Quality Control
Quality Control On Every Batch
- Proof load test performed on production batches before release
- Dimensional tolerance check against published size table
- Breaking strength validation to confirm 3:1 safety factor
- Visual inspection for surface defects, thread integrity, and finish uniformity
- Material Test Certificate to EN 10204 3.1 issued with order on request
- Third-party inspection accepted at warehouse before shipment
Customisation
Customisation Options
- Custom tonnage stamping on the body
- Private label and OEM marking available
- Finish options: electric galvanized, plain stainless steel, or custom coating
- Sizes and configurations built to a supplied drawing
- Packing: carton, gunny bag, pallet, or as per customer requirements
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 |
|---|---|
| Carbon steel shackle | Stainless steel resists corrosion in marine and humid environments but is more expensive and slightly less impact-resistant |
| Galvanized carbon steel shackle | Galvanized offers protection but can degrade faster in saltwater; stainless steel maintains integrity longer in harsh conditions |
| Alloy steel shackle | Alloy steel has higher strength but no corrosion resistance; stainless steel is preferred where environmental exposure is a factor |
| Screw pin shackle | Threaded pin allows secure closure and easier field use; screw pin requires a pin tool and is more prone to loosening under vibration |
Use Guide
How To Use And Inspect Stainless Steel D Shackle
- Verify the stamped working load limit matches the calculated load, not the equipment rating
- Ensure the threaded pin is fully tightened and the nut is secured before each use
- Inspect the shackle for deformation, thread damage, or finish wear before each lift
- Do not exceed the 3:1 safety factor; use the correct size for the load
- Keep the shackle aligned with the load direction; avoid side loading or bending
- Replace the shackle if the body shows distortion, the pin is stripped, or the marking is illegible
- Clean and dry the shackle after exposure to saltwater or moisture to maintain performance
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Answers
Stainless Steel D Shackle FAQ
What is the safety factor on these stainless steel shackles?
A standard 3:1 safety factor is applied, meaning the minimum breaking load is three times the stated safe working load.
Can I get a Material Test Certificate for these shackles?
Yes. A Material Test Certificate to EN 10204 3.1 is supplied on request with every order.
Is the electric galvanized finish standard?
Yes. Electric galvanizing is standard for corrosion protection. Plain stainless steel is available on request.
What sizes are available?
Sizes range from M5 to M50, with safe working loads from 80 kg to 8000 kg. The full size table is provided in the product details.
Can I have custom tonnage marking or branding?
Yes. Custom tonnage stamping, private label, and OEM marking are available for all sizes.
How are the shackles packed for export?
Standard packing is in cartons on pallets. We can also pack in gunny bags or configure carton and pallet patterns to match your warehouse or retail needs.
Are these shackles suitable for marine use?
Yes. The stainless steel construction and electric galvanizing make them ideal for marine, offshore, and outdoor applications where corrosion resistance is critical.
Need A Quote On Stainless Steel D Shackle
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