G43 and G70 Hooks
Clevis Slip Hook Grade 43 Zinc-Plated H331
A forged carbon steel clevis slip hook with a safety gate and zinc plating, designed for chain attachment where the hook can slip over a chain link without disassembly. It is rated for Grade 43 High Test or lower chain, with a 4:1 design factor and working load limits from 1950 lbs to 12500 lbs. Available in sizes from 1/4" to 3/4" diameter, it is used in material handling, rigging, towing, marine, and agricultural applications.
- Size
- From 1/4" to 3/4"
- Material
- Carbon Steel
- Finish
- Powder Coated / Electric Galvanized / Self-Color
- Packing
- Cartons or Gunny Bags and then on Pallets
- Catalogue Family
- G43 and G70 Hooks
- 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 Clevis Slip Hook Grade 43 Zinc-Plated H331 Gives You
- The slip hook design allows chain to pass through without removing the hook from the link, reducing rigging time
- Safety gate prevents accidental disengagement during load handling
- Zinc plating provides corrosion resistance for outdoor and marine environments
- Forged and quenched tempered carbon steel ensures strength and impact resistance
- 4:1 design factor ensures a minimum breaking load four times the safe working load
- Clear WLL marking on the hook body enables traceability and safe operation
- Compatible with Grade 43 High Test or lower grade chain only, preventing overloading
Application Scenarios
Where Clevis Slip Hook Grade 43 Zinc-Plated H331 Is Used
- Material handling in construction sites where chains are frequently connected and disconnected
- Towing and recovery operations using chain loops on trailers or recovery points
- Marine and offshore rigging where corrosion resistance and secure attachment are critical
- Agricultural equipment lifting where chain is used to secure heavy machinery or bales
- Temporary rigging setups requiring quick attachment and detachment of chain links
Who It Is For
Buyers This Product Is Built For
- Rigging contractors needing fast-connect lifting hardware for chain systems
- Towing and recovery fleets specifying reliable chain attachment points
- Marine equipment suppliers integrating corrosion-resistant hooks into rigging kits
- Industrial maintenance teams using chain for lifting and securing heavy components
- Equipment manufacturers building chain-based lifting systems with integrated safety features
Problems It Solves
Problems This Product Removes
- The need to remove a chain link or disconnect a shackle every time a hook must be attached or detached
- Accidental disengagement of a hook during lifting due to lack of a safety gate
- Corrosion damage to hooks in outdoor or marine environments without proper surface treatment
- Overloading a hook with chain grades higher than its design limit
- Inconsistent traceability and marking on hooks leading to unsafe or unverified use
- Buying a hook and a separate safety gate from different suppliers, increasing lead time and cost
Technical Features
Technical Features
- Forged carbon steel body with quench and temper heat treatment for strength
- Safety gate with spring-loaded latch to prevent accidental opening
- Zinc-plated finish for corrosion resistance in humid or marine environments
- 4:1 design factor with minimum breaking load four times the safe working load
- Working load limit stamped on the hook body for field traceability
- Clevis design with a pin closure allowing chain to slip through without disassembly
- Designed for use with Grade 43 High Test or lower grade chain only
Specifications
Clevis Slip Hook Grade 43 Zinc-Plated H331 Specifications
Values published in the Kailipu catalogue for this item. Anything not listed is available on request.
| Capacity Range | 1950 lbs to 12500 lbs safe working load |
|---|---|
| Material | Forged carbon steel quenched and tempered |
| Design Factor | 4:1 minimum breaking load to safe working load |
| Surface Finish | Zinc plated |
| Size Range | 1/4" to 3/4" diameter |
| Safety Gate | Spring-loaded latch with gate closure |
| Chain Compatibility | Grade 43 High Test or lower only |
| WLL Marking | Stamped on hook body |
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 forged blank with quench and temper heat treatment
- Zinc plating applied after forging for corrosion resistance
- Spring steel used for the safety gate to maintain tension and latch function
- Steel pin with threaded end for gate attachment and secure closure
Manufacturing Process
How This Product Is Made
1Forging of the clevis and hook blank from carbon steel
2Quench and temper heat treatment to achieve required strength
3Machining of the pin hole, gate slot, and body contours
4Assembly of the safety gate and pin
5Zinc plating of the entire hook body and gate
6Stamping of WLL and material grade on the hook body
7Proof load testing and final inspection before packing
Quality Control
Quality Control On Every Batch
- Proof load testing on production batches before release
- Dimensional tolerance check against published size table
- Breaking strength validation to confirm 4:1 design factor
- Visual inspection for plating defects and gate alignment
- 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 hook body
- Private label and OEM marking available
- Finish options: zinc plated, powder coated, or electrophoretic black
- Custom sizes and pin configurations built to a supplied drawing
- Packing configurations tailored to carton count and pallet pattern
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 |
|---|---|
| Standard D Shackle | The slip hook allows chain to pass through without disassembly, but a D shackle offers a more rigid connection and higher load capacity for fixed attachments |
| Screw Pin Hook | The slip hook is faster to attach and detach, but a screw pin hook has a more secure closure and is better for overhead lifting |
| Lift Ring with Chain | The slip hook is more compact and easier to use with chain, but a lift ring requires a separate shackle or link for connection |
| Snap Hook | The slip hook has a larger opening and better chain compatibility, but a snap hook is faster for light-duty attachment and retrieval |
Use Guide
How To Use And Inspect Clevis Slip Hook Grade 43 Zinc-Plated H331
- Verify the chain diameter matches the hook size before use
- Ensure the safety gate closes fully and latches securely before lifting
- Never exceed the stamped working load limit on the hook body
- Use only with Grade 43 High Test or lower grade chain
- Inspect the hook for deformation, gate wear, or plating damage before each use
- Retire the hook if the safety gate no longer closes properly or the marking is illegible
Related Products
Often Ordered With This Item
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Grade 70 Bolt-On Grab Hook with Backer Plate
5/16 G70 Mini J Hook | Compact Frame J Hook
Triangle Snap Hook, Triangle Ring Safety Hook For Lashing Strap
Clevis Grab Hook with Safety Latch A330N Grade 70
Weld On Grab Hook Grade 70 Forged Steel Chain Hooks
Eye J Hook 8" Tow J Hook Short Type, G70 WLL 4700LBS
Eye J Hook 15" Towing Long Shank Hook,Grade 70 Forged Steel WLL 4700LBS
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Guides Worth Reading Before You Order
Answers
Clevis Slip Hook Grade 43 Zinc-Plated H331 FAQ
Can this hook be used on Grade 80 chain?
No. It is designed for Grade 43 High Test or lower grade chain only. Using it on higher grade chain exceeds the safe working load and risks failure.
Is the safety gate reliable under vibration?
Yes. The spring-loaded gate is designed to stay closed under continuous vibration, but it should be checked before each use for wear or misalignment.
What is the design factor for this hook?
A standard 4:1 design factor, so the minimum breaking load is four times the stated safe working load.
Can you provide a Material Test Certificate?
Yes. A Material Test Certificate to EN 10204 3.1 is supplied with the order on request.
What finishes are available?
Standard finish is zinc plated. Custom options include powder coating and electrophoretic black.
How are the hooks packed for export?
Standard packing is in cartons, with multiple cartons on a pallet. Custom carton and pallet configurations are available to match your warehouse or retail pack.
What sizes are available?
Sizes range from 1/4" to 3/4" diameter. The size table includes dimensions A, B, E, L, N, and M, along with weight and WLL for each size.
Need A Quote On Clevis Slip Hook Grade 43 Zinc-Plated H331
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.
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