Shackles
Screw Pin Bow Shackle
A screw pin bow shackle made from carbon steel or stainless steel, drop forged for strength, with a threaded pin that screws into the body for secure connection. Available in sizes M5 to M50, with safe working loads from 80 kg to 8000 kg. Designed for lifting, rigging, towing, and general industrial use where quick attachment and detachment are needed. The pin is tightened by hand or tool and secured with a locking nut or cotter pin to prevent loosening under load.
- 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 Screw Pin Bow Shackle Gives You
- Threaded pin allows for quick and secure connection without requiring a separate pin and cotter
- Drop forged construction provides high strength and impact resistance in carbon steel or stainless steel
- 3:1 safety factor ensures the minimum breaking load is three times the safe working load
- Electric galvanized surface finish resists corrosion in humid or outdoor environments
- Available in multiple sizes from M5 to M50 to match a wide range of load and equipment requirements
- Can be used in lifting, rigging, towing, and general industrial applications where frequent connection changes are needed
- Pin can be tightened with hand tools or wrenches, making it field-serviceable without special equipment
Application Scenarios
Where Screw Pin Bow Shackle Is Used
- Lifting and rigging operations on construction sites where shackles are frequently connected and disconnected
- Towing and recovery setups on trucks and trailers where quick rigging changes are required
- Marine and offshore applications where corrosion resistance from electric galvanizing is beneficial
- Industrial maintenance where equipment is regularly re-rigged or repositioned
- Manufacturing and assembly lines using temporary lifting points for parts and components
- General purpose rigging in factories, warehouses, and logistics hubs with variable load requirements
Who It Is For
Buyers This Product Is Built For
- Procurement engineers sourcing rigging hardware for construction and industrial projects
- Fleet and towing operators needing reliable, field-serviceable shackles for recovery kits
- Marine contractors specifying corrosion-resistant rigging for offshore or dockside use
- Manufacturers requiring quick-connect rigging for assembly line or equipment handling
- Rigging distributors carrying a full range of shackles who need a versatile, standard product
- Contractors in mining and energy sectors requiring durable, field-ready rigging components
Problems It Solves
Problems This Product Removes
- The need to carry multiple types of shackles when a single screw pin design can handle both light and medium duty connections
- Time lost in rigging setups due to the need for separate pins and cotter pins with traditional shackles
- Pin loosening under vibration during transport or lifting due to lack of locking mechanism
- Corrosion damage in humid or outdoor environments without proper surface treatment
- Inconsistent safety margins when using non-standard or unmarked shackles
- Difficulty in sourcing a single supplier for a full range of shackle sizes and materials
Technical Features
Technical Features
- Drop forged body in carbon steel or stainless steel for high strength and durability
- Threaded screw pin with a head for hand tightening and a threaded end for engagement
- 3:1 safety factor with minimum breaking load three times the safe working load
- Electric galvanized surface finish for corrosion resistance in harsh environments
- Standard size range from M5 to M50 with safe working loads from 80 kg to 8000 kg
- Pin secured with a locking nut or cotter pin to prevent loosening under dynamic load
- Safe working load and material grade stamped on the body for traceability
Specifications
Screw Pin Bow Shackle Specifications
Values published in the Kailipu catalogue for this item. Anything not listed is available on request.
| Capacity Range | 80 kg to 8000 kg safe working load |
|---|---|
| Material | Carbon steel or stainless steel |
| Process | Drop forging |
| Surface Finish | Electric galvanized |
| Safety Factor | 3:1 minimum breaking load to safe working load |
| Size Range | M5 to M50 |
| Weight per 100 pcs | 2.2 kg to 2,012 kg depending on size |
| Dimensions | d(mm) 5 to 50, D(mm) 10 to 102, a(mm) 19 to 200, c(mm) 8 to 78, r(mm) 11 to 108, b(mm) 14 to 108 |
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
- Carbon steel body drop forged and heat-treated for strength and toughness
- Stainless steel option available for corrosive environments
- Electric galvanizing layer applied after forging for corrosion protection
- Threaded screw pin made from high-strength steel with precision threading
- Locking nut or cotter pin to prevent pin loosening under vibration
Manufacturing Process
How This Product Is Made
1Drop forging of the shackle body and pin blanks
2Heat treatment to improve strength and impact resistance
3Machining of threads on the pin and body bore
4Assembly of the screw pin into the body
5Electric galvanizing for corrosion resistance
6Stamping of safe working load and material grade on the body
7Proof load testing and final inspection before packing
Quality Control
Quality Control On Every Batch
- Proof load test on production batches to verify safe working load
- Dimensional tolerance check against published size table
- Breaking strength validation to confirm 3:1 design factor
- Visual inspection for surface defects, cracks, or misalignment
- 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 traceability
- Private label and OEM marking available
- Surface finish to order including zinc plating, powder coating, or electrophoretic black
- Sizes and configurations built to a supplied drawing
- Packing configured as 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 |
|---|---|
| Screw pin shackle with cotter pin | The screw pin design allows for faster connection and disconnection than a cotter pin, but a cotter pin offers a more positive lock against loosening |
| Rigid pin shackle | The screw pin allows for easier adjustment and removal without tools, but a rigid pin is simpler and has fewer moving parts |
| Welded shackle | The drop forged construction provides higher strength and impact resistance than a welded shackle, but a welded shackle may be lighter for the same capacity |
| Screw pin with locking nut | The locking nut adds security against loosening, but the nut can be lost or damaged during field use |
Use Guide
How To Use And Inspect Screw Pin Bow Shackle
- Ensure the screw pin is fully tightened before applying any load
- Check that the pin is not loose or damaged before each use
- Use a locking nut or cotter pin to prevent loosening under vibration
- Inspect the body and pin for deformation, cracks, or wear before each operation
- Do not exceed the stamped safe working load on the body
- Retire the shackle if the pin threads are stripped, the body shows deformation, or the marking is illegible
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Answers
Screw Pin Bow Shackle FAQ
What is the safety factor on these shackles?
A standard 3:1 design factor, so the minimum breaking load is three times the stated safe working load.
Can I get a Material Test Certificate?
Yes. A Material Test Certificate to EN 10204 3.1 is supplied on request with every order.
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 specs.
Is the surface finish corrosion resistant?
Yes. The electric galvanizing finish provides good resistance to moisture and outdoor exposure.
Can I have custom tonnage stamping and branding?
Yes. Custom tonnage stamping, private label marking, and OEM packaging are standard options.
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 your warehouse or retail needs.
What is the lead time for an order?
Production lead time is evaluated from multiple angles before confirmation. We offer two months of free warehouse storage in Qingdao to consolidate shipments.
Need A Quote On Screw Pin 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.