Shackles
Stainless Steel Bow Shackle JIS Standard Screw Pin Anchor Shackle
A JIS Type A stainless steel bow shackle with a screw pin, designed for secure connection in marine, outdoor, and general rigging applications. The curved bow body provides a smooth load path, and the screw pin is tightened to secure the assembly. Sizes range from 5mm to 50mm with working load limits from 90kg to 8000kg. Marked with WLL and size on the body. Available in standard electro-galvanized finish or custom surface treatments.
- Size
- 5mm-50mm Surface: electro galvanize or on special requirement. Process: free forged; quenched and tempered WLL
- Material
- Carbon steel
- 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 JIS Bow Shackle Gives You
- Stainless steel construction resists corrosion in marine and outdoor environments where salt, moisture, and weather degrade carbon steel
- Screw pin design allows for secure closure and adjustment in tight spaces or uneven load angles
- JIS standard compliance ensures dimensional consistency and interchangeability across international rigging systems
- WLL and size embossed on the body for immediate field identification and traceability
- Free-forged and quenched tempered process improves strength and impact resistance in dynamic loading
- Smooth bow profile reduces rope and cable wear at the anchor point compared to sharp-edged fittings
- Electro-galvanized finish enhances surface protection and extends service life in harsh conditions
Application Scenarios
Where JIS Bow Shackle Is Used
- Marine mooring and anchor line connections where saltwater exposure demands corrosion resistance
- Offshore platform rigging and temporary structural connections in coastal or offshore environments
- Outdoor crane operations in ports and shipyards where equipment is exposed to weather and humidity
- Towing and recovery setups on marine vessels and offshore support craft using synthetic or wire rope
- General industrial rigging in chemical plants, offshore construction, and coastal infrastructure projects
- Temporary guy wire and cable anchoring where fittings must resist long-term environmental degradation
Who It Is For
Buyers This Product Is Built For
- Marine equipment suppliers specifying corrosion-resistant rigging for offshore and coastal vessels
- Ports and terminal operators managing mooring systems and cargo handling gear
- Offshore construction contractors needing durable, traceable shackles for temporary structures
- Rigging distributors carrying a stainless steel shackle range with JIS compliance
- Industrial maintenance teams replacing carbon steel shackles in wet or corrosive environments
Problems It Solves
Problems This Product Removes
- Carbon steel shackles rusting and failing prematurely in marine or humid environments
- Rigging failures due to loose or improperly secured screw pins under dynamic load
- Lack of traceability in the field when WLL is not clearly marked on the shackle body
- Inconsistent dimensions between shackles from different suppliers leading to fit issues
- Need for a single supplier to provide both standard and custom stainless steel shackles
- Buying shackles from multiple sources for different finishes, sizes, and standards
Technical Features
Technical Features
- JIS Type A standard compliance for bow shackle dimensions and performance
- Screw pin with threaded engagement for secure closure and adjustment
- Free-forged body in stainless steel, quenched and tempered for strength and toughness
- Working load limit and size embossed on the shackle body for field identification
- Standard 4:1 design factor with minimum breaking load four times the WLL
- Electro-galvanized surface finish as standard, custom finishes available
- Dimensions: d, D, L, B, and weight provided per size from 5mm to 50mm
Specifications
JIS Bow Shackle Specifications
Values published in the Kailipu catalogue for this item. Anything not listed is available on request.
| Capacity Range | 90kg to 8000kg safe working load |
|---|---|
| Material | Stainless steel |
| Pin Type | Screw pin with threaded engagement |
| Design Factor | 4:1 minimum breaking load to safe working load |
| Surface Finish | Electro-galvanized as standard, custom finishes available |
| 5mm Dimensions | d 10 D 10 L 18.5 B 5 mm weight 0.026 kg |
| 10mm Dimensions | d 18 D 17 L 36 B 10 mm weight 0.080 kg |
| 20mm Dimensions | d 36 D 37 L 74 B 20 mm weight 0.800 kg |
| 30mm Dimensions | d 47 D 50 L 95 B 27 mm weight 1.900 kg |
| 50mm Dimensions | d 90 D 100 L 185 B 53 mm weight 12.500 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 for corrosion resistance in marine and outdoor service
- Screw pin made from heat-treated stainless steel for thread strength and durability
- Electro-galvanized coating applied after forging to enhance surface protection
- Custom surface finishes available including powder coating, electrophoretic black, or no coating
Manufacturing Process
How This Product Is Made
1Free forging of the bow and pin blanks from stainless steel billet
2Quench and temper heat treatment to achieve required mechanical properties
3Machining of the pin thread and body bore to JIS dimensional tolerances
4Assembly of the screw pin and final tightening check
5Surface treatment via electro-galvanizing or custom finish
6Embossing of WLL and size on the shackle body
7Proof load testing and 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 design factor
- Visual inspection for surface defects, thread integrity, and pin alignment
- Material Test Certificate to EN 10204 3.1 supplied with orders
- Third-party inspection accepted at warehouse before shipment
Documentation
Certification And Documentation Supplied
- Material Test Certificate to EN 10204 3.1 supplied with orders
- Working load limit and size stamped on the body for traceability
Customisation
Customisation Options
- Custom tonnage stamping on the bow body
- Private label and OEM marking for brand-specific packaging
- Custom surface finish including zinc plating, powder coating, or electrophoretic black
- Custom sizes and pin configurations built to a supplied drawing
- Carton and pallet packing configured for your warehouse or retail pack
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 screw pin shackle | Stainless steel resists corrosion in marine and wet environments but costs more and has lower yield strength than carbon steel |
| Screw pin shackle with safety pin | The screw pin allows for adjustable fit and tight closure, but requires regular inspection to ensure it does not loosen under vibration |
| Rigid bow shackle | The screw pin allows for easier disassembly and adjustment, but adds a threaded component that can fail if not properly maintained |
| Bolt pin shackle | The screw pin is lighter and easier to install in tight spaces, but lacks the locking nut and cotter pin security of a bolt pin |
Use Guide
How To Use And Inspect JIS Bow Shackle
- Verify the embossed WLL matches the calculated load before use, not the equipment rating
- Tighten the screw pin fully before applying any load, and check it after initial tensioning
- Inspect the pin thread and body for wear, deformation, or corrosion before each use
- Do not use if the screw pin will not fully engage or if the body shows bending or cracking
- Avoid side loading the shackle; keep the load aligned with the bow axis
- Retire the shackle if the WLL marking is illegible, the body is deformed, or the pin fails to hold
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Answers
JIS Bow Shackle FAQ
Is this shackle suitable for marine use?
Yes. The stainless steel construction and electro-galvanized finish resist corrosion in marine environments, making it suitable for mooring, anchoring, and offshore rigging.
What is the safety factor on these shackles?
A standard 4:1 design factor is used, so the minimum breaking load is four times the stated safe working load.
Can the WLL be custom stamped?
Yes. Custom tonnage stamping is available on request, and the WLL is embossed on the body for traceability.
What surface finishes are available?
Electro-galvanized is standard. Custom finishes include powder coating, electrophoretic black, or no coating, depending on the application.
Are Material Test Certificates provided?
Yes. A Material Test Certificate to EN 10204 3.1 is supplied with each order upon request.
Can you supply custom sizes?
Yes. Custom sizes and pin configurations can be built to a drawing, and the shackle can be produced to your specifications.
How are they packed for export?
Standard packing is cartons on pallets. We can configure carton count and pallet pattern to suit your warehouse or retail pack. Goods can be held in our Qingdao warehouse free for two months.
Need A Quote On JIS Bow 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.