G43 and G70 Hooks
Clevis Grab Hook with Safety Latch A330N Grade 70
A forged alloy steel clevis grab hook with a spring-actuated safety latch to prevent accidental disengagement of chain links. Designed for use with Grade 70 or lower chain, it joins chain segments or shortens chain length in towing, pulling, and dragging applications. Not approved for overhead lifting. Available from 5/16" to 5/8" with working load limits from 2.45T to 8.62T and a 4:1 design factor.
- Size
- From 5/16" to 5/8" Ultimate Load is 4 times Working Load Limit
- Material
- Alloy Steel Processing: Forged
- Finish
- Self-colored
- Packing
- Cartons + 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 Grab Hook with Latch Gives You
- Spring-actuated safety latch prevents chain from slipping out during dynamic loads
- Forged alloy steel construction ensures strength and impact resistance at Grade 70
- Self-colored finish provides visual identification of Grade 70 material
- Compact design allows quick connection and disconnection of chain links
- 4:1 design factor ensures minimum breaking load is four times the working load limit
- No need for additional locking devices when joining chain segments
- Suitable for mooring, towing, and ground-level pulling where overhead lift is not involved
Application Scenarios
Where Grab Hook with Latch Is Used
- Mooring operations on marine vessels where chain links must be joined securely without risk of disengagement
- Towing and recovery setups using chain where a quick-connect, secure link is needed
- Ground-level pulling and dragging in construction or mining where chain is used to move heavy equipment
- Temporary rigging setups in ports or industrial yards where chain length needs adjustment
- Truck and trailer tie-down systems using chain where a secure, non-slip connection is required
Who It Is For
Buyers This Product Is Built For
- Marine and offshore contractors specifying chain connection hardware for mooring and anchoring
- Towing and recovery service providers building chain-based winch and pull systems
- Construction and infrastructure teams using chain in ground-level hauling and positioning
- Logistics and transport operators managing trailer tie-downs with chain-based systems
- Rigging distributors carrying a range of chain connectors who need a reliable, non-overhead-rated hook
Problems It Solves
Problems This Product Removes
- Chain links slipping out of a standard grab hook during dynamic pulling or vibration
- Need for a secondary locking mechanism to secure chain connections in high-stress environments
- Inconsistent identification of chain hardware grade leading to misuse on higher load applications
- Overhead lifting risks from using a hook not rated for vertical suspension
- Multiple parts required to join chain segments, increasing setup time and failure points
- Lack of a compact, self-locking solution for temporary chain length adjustments
Technical Features
Technical Features
- Forged alloy steel body with heat treatment for strength and durability
- Spring-actuated safety latch that opens under pressure and locks automatically
- Clevis design with a pin hole for chain link insertion and secure connection
- 4:1 design factor with minimum breaking load four times the stated working load limit
- Self-colored finish to identify Grade 70 material
- Working load limit stamped on the body for traceability
- Not rated for overhead lifting, intended for horizontal or ground-level use only
Specifications
Grab Hook with Latch Specifications
Values published in the Kailipu catalogue for this item. Anything not listed is available on request.
| Capacity Range | 2.45T to 8.62T safe working load |
|---|---|
| Material | Forged alloy steel Grade 70 |
| Design Factor | 4:1 minimum breaking load to safe working load |
| Surface Finish | Self-colored |
| Size Range | 5/16” to 5/8” (8mm to 16mm) |
| 5/16” Dimensions | B 10.2 E 11.2 P 11.5 R 56.0 T 12.0 mm weight 0.43 kg |
| 3/8” Dimensions | B 12.0 E 12.7 P 12.0 R 66.7 T 10.5 mm weight 0.60 kg |
| 1/2” Dimensions | B 16.8 E 16.8 P 16.0 R 83.5 T 17.8 mm weight 1.18 kg |
| 5/8” Dimensions | B 23.1 E 19.8 P 19.0 R 105.0 T 20.4 mm weight 2.12 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
- Forged alloy steel body with heat treatment to achieve Grade 70 strength
- Self-colored finish applied after forging to identify material grade
- No additional coating or plating to preserve the original surface integrity
- Latching mechanism made from hardened steel to resist wear under repeated use
Manufacturing Process
How This Product Is Made
1Forging of the clevis and hook blanks from alloy steel billets
2Heat treatment to achieve Grade 70 mechanical properties
3Machining of the pin hole, latch mechanism, and body contours
4Assembly of the spring-actuated safety latch
5Surface finishing with self-coloring to identify Grade 70
6Working load limit stamping and marking
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
- Latching mechanism function test to ensure smooth operation and secure hold
- Material Test Certificate to EN 10204 3.1 issued with the order on request
- Third-party inspection accepted at warehouse before shipment
Customisation
Customisation Options
- Custom tonnage stamping on the body
- Private label and OEM marking available
- Finish to order including zinc plating, powder coating, or electrophoretic black
- Custom sizes and assemblies 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 |
|---|---|
| Standard clevis hook without latch | The safety latch prevents accidental disengagement during dynamic loads, but adds a moving part that requires inspection for wear |
| Screw pin shackle | The clevis grab hook is faster to connect and disconnect, but the screw pin offers more precise tension control and is better for repeated load cycling |
| Overhead-rated hook | This hook is not approved for overhead lifting and lacks the design features for vertical suspension, but it is more compact and cost-effective for horizontal chain joining |
| Chain link connector with cotter pin | The grab hook allows faster connection and disconnection without tools, but the cotter pin method is more secure under continuous vibration |
Use Guide
How To Use And Inspect Grab Hook with Latch
- Match the hook size and chain diameter before connecting to ensure compatibility
- Do not exceed the stamped working load limit under any condition
- Ensure the safety latch is fully engaged after each connection
- Inspect the latch mechanism for wear or deformation before each use
- Do not use for overhead lifting—only for horizontal or ground-level pulling
- Retire the hook if the body shows deformation, the latch fails to lock, or the marking is illegible
Related Products
Often Ordered With This Item
Bolt-On Tow Hook with Safety Latch
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
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
8 Inch Clevis Short J Tow Hook Grade 70 Forged Steel WLL 5400LBS
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Guides Worth Reading Before You Order
Answers
Grab Hook with Latch FAQ
Is this hook rated for overhead lifting?
No. It is not approved for overhead lifting and should only be used in horizontal or ground-level applications.
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 I use this with Grade 80 chain?
No. It is designed for Grade 70 or lower chain. Using it with higher-grade chain exceeds its rated strength.
What certificates come with the order?
A Material Test Certificate to EN 10204 3.1 is supplied on request. Every batch is proof load tested with dimensional and breaking strength checks recorded.
Can I get custom tonnage stamping and private label?
Yes. Custom tonnage stamping, private label marking, and OEM packing are standard options, and the finish can be zinc plated, powder coated, or electrophoretic black.
How are the hooks packed for export?
Cartons on pallets as standard. We will configure the carton count and pallet pattern to suit your warehouse or retail pack. Goods can be held in our Qingdao warehouse free for two months while you consolidate a container.
What sizes are available?
The range runs from 5/16” to 5/8” (8mm to 16mm). The size table on this page gives the B, E, P, R, T dimensions and unit weight for each capacity.
Need A Quote On Grab Hook with Latch
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.