Shackles
Bow Shackle/ Screw Pin Anchor Shackle
A drop-forged alloy steel bow shackle with a screw pin closure, designed for secure, high-load connections in lifting and rigging. Available from 3/16 inch to 2-1/2 inch body size, with working load limits from 0.33 tons to 500 tons. The body is quenched and tempered, the pin is forged and tempered, and the finish is hot-dipped galvanized, powder coated, or zinc plated. Standard 4:1 design factor with a 6:1 safety factor on request.
- Size
- From 3/16"to 2-1/2"
- Material
- Body-Super Carbon Steel. Screw Pin-Alloy Steel
- Finish
- Body-Hot Dipped Galvanized / Powder Coated / Zinc Plated Screw Pin-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 Bow Shackle Gives You
- Drop-forged body in quenched and tempered carbon steel provides high impact resistance and load capacity
- Screw pin made from alloy steel with hot or cold forging ensures strength and reliable closure
- Standard 4:1 design factor with optional 6:1 safety factor for high-risk applications
- Hot-dipped galvanized, powder coated, or zinc plated finish resists corrosion in marine and outdoor environments
- Secure screw pin closure with a threaded pin and nut prevents accidental opening under load
- Available in sizes from 3/16 inch to 2-1/2 inch body diameter, covering 0.33 to 500 tons working load
- Proven performance in construction, maritime, off-road recovery, and industrial lifting
Application Scenarios
Where Bow Shackle Is Used
- Marine anchor and mooring systems where corrosion resistance and high strength are critical
- Off-road recovery operations using winches and tow straps with dynamic loading
- Construction site lifting where rigging components must handle variable and heavy loads
- Industrial rigging setups connecting chains, slings, and cables with secure, repeatable connections
- Oil and gas field equipment handling where failure risk must be minimized
- Truck and trailer tie-down systems requiring durable, field-reliable shackles
- Cranes and hoists in manufacturing facilities needing certified, traceable rigging hardware
Who It Is For
Buyers This Product Is Built For
- Marine equipment suppliers specifying anchor and mooring hardware for vessels
- Off-road recovery kit manufacturers building winch and tow systems for 4x4s
- Construction and infrastructure contractors sourcing certified rigging components
- Industrial rigging distributors carrying a full range of shackles with traceability
- Oil and gas field service providers requiring high-load, corrosion-resistant shackles
- Truck and trailer fleet operators specifying durable tie-down hardware
- Cranes and lifting equipment integrators needing compliant, certified components
Problems It Solves
Problems This Product Removes
- Risk of pin loosening under vibration or dynamic load due to poor closure design
- Corrosion damage in marine or outdoor environments reducing service life
- Inconsistent load capacity due to unverified material or manufacturing process
- Lack of traceability and certification for safety-critical rigging components
- Need to source multiple shackle types from different suppliers for a single rigging bill
- Inadequate safety factor in low-cost shackles that fail under overload
- Difficulty finding a single supplier for both standard and custom-sized shackles
Technical Features
Technical Features
- Drop-forged body in super carbon steel, quenched and tempered for strength
- Screw pin made from alloy steel, hot or cold forged and quenched and tempered
- Standard 4:1 design factor with 6:1 safety factor available on request
- Working load limit stamped on the body for traceability and field use
- Screw pin with threaded closure and nut to prevent accidental opening
- Finish options: hot-dipped galvanized, powder coated, or zinc plated
- Dimensions provided for A, B, C, E, G, H, P, and C A in inches and metric equivalents
- Complies with ASME B30.26 for screw pin shackles and relevant international standards
Specifications
Bow Shackle Specifications
Values published in the Kailipu catalogue for this item. Anything not listed is available on request.
| Capacity Range | 0.33 tons to 500 tons safe working load |
|---|---|
| Material | Body - Super carbon steel, Pin - Alloy steel |
| Processing | Body - Drop forged, quenched and tempered; Pin - Hot or cold forged, drop forged, quenched and tempered |
| Design Factor | 4:1 standard, 6:1 optional |
| Surface Finish | Hot-dipped galvanized, powder coated, zinc plated |
| Size Range | 3/16 inch to 2-1/2 inch body diameter |
| Working Load Limit | Stamped on the body for traceability |
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 then quenched and tempered for high strength and impact resistance
- Alloy steel screw pin, forged and tempered to match body strength and prevent failure
- Hot-dipped galvanized finish for corrosion protection in harsh environments
- Powder coated or zinc plated finish for additional weather and abrasion resistance
- Threaded pin and nut made from high-strength alloy steel to resist deformation
Manufacturing Process
How This Product Is Made
1Drop forging of the bow body and screw pin blanks
2Quench and temper heat treatment of both body and pin
3Machining of the pin thread and body bore
4Assembly of the screw pin with nut and final tightening
5Surface finishing by hot-dip galvanizing, powder coating, or zinc plating
6Stamping of working load limit and traceability marking on the body
7Proof load testing and dimensional 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 design factor
- Material Test Certificate to EN 10204 3.1 issued with the order on request
- Third-party inspection accepted at the Qingdao warehouse before shipment
- Visual inspection for surface defects, finish uniformity, and pin alignment
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: hot-dipped galvanized, powder coated, or zinc plated
- Custom sizes and pin configurations built to a supplied drawing
- Packing cartons and pallets configured to match warehouse or retail 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 |
|---|---|
| Pin-type shackle with bolt and nut | The screw pin version is lighter and faster to install but may loosen under vibration; the bolt and nut version is more secure but requires more tools |
| Rigid shackle with no moving parts | The screw pin allows for quick connection and disconnection but adds a potential failure point if not properly tightened |
| Welded shackle | Drop-forged construction offers higher strength and impact resistance than welded joints, which can crack under dynamic load |
| Soft shackle | Steel shackles handle abrasion and high loads; soft shackles are lighter and float but wear out faster on rough surfaces |
Use Guide
How To Use And Inspect Bow Shackle
- Verify the stamped working load limit matches the calculated load, not the equipment rating
- Ensure the screw pin is fully threaded and tightened with a wrench before use
- Inspect the pin and body for deformation, corrosion, or thread damage before each use
- Do not use if the pin is loose, the body is cracked, or the marking is illegible
- Avoid side loading the shackle; keep the load aligned with the bow axis
- Retire the shackle if the pin cannot be tightened securely or if the body shows permanent deformation
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Answers
Bow Shackle FAQ
What is the safety factor on these shackles?
Standard 4:1 design factor; a 6:1 safety factor is available on request. The minimum breaking load is four or six times the safe working load depending on the option selected.
Are Material Test Certificates available?
Yes. A Material Test Certificate to EN 10204 3.1 is supplied with the order on request. Every batch undergoes proof load testing and dimensional checks.
Can you custom stamp our tonnage and brand?
Yes. Custom tonnage stamping, private label marking, and OEM packaging are standard options. The finish can be hot-dipped galvanized, powder coated, or zinc plated.
What sizes and capacities are available?
Sizes range from 3/16 inch to 2-1/2 inch body diameter. Working load limits range from 0.33 tons to 500 tons, with full dimensions provided in the size table.
How are they packed for export?
Cartons or gunny bags on pallets as standard. We can configure carton count and pallet pattern to suit your warehouse or retail pack. Goods can be stored in our Qingdao warehouse free for two months.
Are these shackles certified to ASME B30.26?
Yes. The G209 screw pin anchor shackle complies with ASME B30.26 for screw pin shackles and meets relevant international standards including DIN, EN, and ASTM.
What finish options are available?
Standard finishes are hot-dipped galvanized, powder coated, or zinc plated. Custom finishes are available on request for specific corrosion or aesthetic requirements.
Need A Quote On 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.