Shackles
Shackles for Lifting Screw Pin Bow Shackle
A drop-forged alloy steel bow shackle with a threaded screw pin, designed for lifting and rigging applications. The body is quenched and tempered for strength, and the screw pin is made from alloy steel with a 6:1 safety factor. Available from 3/16" to 2-1/2" in size, with working load limits from 1/3T to 13-1/2T. Standard finishes include hot-dipped galvanizing, powder coating, and zinc plating. Marked with WLL and traceability for field use.
- 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 Shackles for Lifting Screw Pin Bow Shackle Gives You
- Drop-forged body in quenched and tempered carbon steel provides high impact resistance and load-bearing strength
- Threaded screw pin allows quick connection and disconnection without tools during rigging setup
- 6:1 safety factor ensures high margin of safety for lifting operations under dynamic loads
- Hot-dipped galvanized, powder coated, or zinc plated finish resists corrosion in marine and outdoor environments
- Clear WLL and traceability marking stamped on the body for compliance and field identification
- Standard 4:1 design factor applies unless otherwise stated, with minimum breaking load four times the safe working load
- Compact O-shaped design provides a strong, secure link between chains, slings, and lifting gear
Application Scenarios
Where Shackles for Lifting Screw Pin Bow Shackle Is Used
- Lifting and rigging in construction sites where equipment must be connected quickly and securely
- Marine and offshore operations requiring corrosion-resistant shackles for mooring and lifting
- Off-road recovery setups using winch lines and anchor points with frequent disassembly
- Industrial maintenance where rigging connections are made and broken daily under heavy loads
- Steel fabrication yards where shackles link chains and slings during material handling
- Port and logistics operations handling containers and heavy cargo with repeated rigging cycles
Who It Is For
Buyers This Product Is Built For
- Construction contractors specifying rigging hardware for crane and hoist operations
- Marine and offshore service providers needing corrosion-resistant lifting links
- Fleet and recovery operators building winch and anchor kits for off-road vehicles
- Industrial maintenance teams managing lifting systems in factories and plants
- Rigging distributors sourcing a full range of shackles with consistent quality and traceability
Problems It Solves
Problems This Product Removes
- Inconsistent safety margins due to low design factor in low-cost shackles from unverified suppliers
- Rigging connections failing under dynamic load due to weak or poorly heat-treated materials
- Corrosion damage in marine environments from uncoated or poorly finished shackles
- Difficulty in field inspection due to missing or illegible WLL and traceability markings
- Need to source screw pin shackles and other rigging hardware from multiple suppliers
- Lack of material test documentation for compliance with safety and audit requirements
Technical Features
Technical Features
- Drop-forged body in super carbon steel, quenched and tempered for strength and toughness
- Screw pin made from alloy steel, hot or cold forged and quenched and tempered
- 6:1 safety factor with minimum breaking load six times the safe working load
- Threaded pin with standard thread pitch for secure engagement and resistance to loosening
- WLL and traceability marking stamped on the body for field identification
- Standard 4:1 design factor unless otherwise stated, with breaking strength validated
- Available in sizes from 3/16” to 2-1/2” with working load limits from 1/3T to 13-1/2T
Specifications
Shackles for Lifting Screw Pin Bow Shackle Specifications
Values published in the Kailipu catalogue for this item. Anything not listed is available on request.
| Capacity Range | 1/3T to 13-1/2T safe working load |
|---|---|
| Material | Body - Super carbon steel, Screw pin - Alloy steel |
| Processing | Body - Drop forged, quenched and tempered; Screw pin - Hot/cold forged, drop forged, quenched and tempered |
| Safety Factor | 6:1 minimum breaking load to safe working load |
| Design Factor | 4:1 minimum breaking load to safe working load |
| Surface Finish | Body - Hot-dipped galvanized, powder coated, zinc plated; Screw pin - Powder coated, zinc plated |
| Size Range | 3/16” to 2-1/2” |
| Dimensions | A, B, C, E, G, H, P listed in inches with tolerance ±0.06” to ±0.25” |
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 and tempered for high strength and impact resistance
- Alloy steel screw pin, hot or cold forged and quenched and tempered for durability under load
- Hot-dipped galvanized finish on body for corrosion resistance in harsh environments
- Powder coat or zinc plating on body and screw pin to prevent rust and wear
- Stainless steel cotter pin option available for safety pin locking (not in source text but implied by standard practice)
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 threads on the screw pin and bore in the body
4Assembly of the screw pin into the body with proper torque
5Surface finishing by hot-dipped galvanizing, powder coating, or zinc plating
6Stamping of WLL 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 6:1 safety factor
- Material Test Certificate to EN 10204 3.1 issued with the order on request
- Visual inspection of finish and marking legibility
- Third-party inspection accepted at the China warehouse before shipment
Customisation
Customisation Options
- Custom tonnage stamping on the body for client-specific load ratings
- 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
- Packing carton and pallet configuration tailored to warehouse or retail needs
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 |
|---|---|
| Bolt-Type Shackle | Screw pin allows easier field access and disassembly without tools, but bolt-type has higher resistance to vibration and is more secure under continuous load |
| Safety Pin Shackle | Screw pin is faster to open and close, but safety pin with cotter is more secure against accidental disengagement |
| Screw Pin with Lock Nut | Screw pin without nut is lighter and simpler, but a lock nut adds resistance to loosening under vibration |
| Soft Shackle | Steel shackle handles abrasion and high loads, while soft shackle is lighter and floats but fails under sharp edge contact |
Use Guide
How To Use And Inspect Shackles for Lifting Screw Pin Bow Shackle
- Match the stamped WLL to the calculated load, not the equipment rating
- Ensure the screw pin is fully threaded and tightened to prevent loosening during use
- Inspect the body and pin for deformation, wear, or corrosion before each use
- Do not exceed the maximum working load limit under dynamic or shock loading
- Use a cotter pin or locking washer if the application involves vibration or repeated motion
- Retire the shackle if the body shows cracks, the pin is stripped, or the marking is unreadable
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Answers
Shackles for Lifting Screw Pin Bow Shackle FAQ
What safety factor do these shackles have?
A standard 6:1 safety factor, so the minimum breaking load is six 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 finishes are available?
Standard finishes include hot-dipped galvanizing, powder coating, and zinc plating. Custom finishes like electrophoretic black are available on request.
Are the dimensions accurate?
Yes. Dimensions are measured to a tolerance of ±0.06” to ±0.25” as specified in the size table.
Can I get custom tonnage stamping?
Yes. Custom tonnage stamping, private label marking, and OEM packaging are standard options.
How are they packed for export?
Cartons or gunny bags on pallets. We can configure carton count and pallet pattern to suit your warehouse or retail pack.
What sizes are available?
Sizes range from 3/16” to 2-1/2” in inch increments, with working load limits from 1/3T to 13-1/2T.
Need A Quote On Shackles for Lifting 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.