Grade 80 Hooks
G80 Shank Self-locking Hook US Type
A Grade 80 shank hook with a self-locking pin made from quenched and tempered alloy steel, designed for use with Grade 80 chain slings. The positive latch mechanism prevents accidental opening under load and remains closed until the hook is fully unloaded. Available in sizes from 5/16 to 3/8, it is powder coated or painted for corrosion resistance and supplied in cartons on pallets.
- Size
- From 5/16 to 3/8 Surface :Powder Coated,Painted
- Material
- Alloy steel
- Packing
- Cartons then pack on pallets
- Catalogue Family
- Grade 80 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 G80 Shank Self-Locking Hook US Type Gives You
- The self-locking pin mechanism ensures the hook cannot open accidentally during lifting, reducing risk of load drop
- Quenched and tempered alloy steel body provides high strength and impact resistance for heavy-duty chain sling applications
- Positive latch design is more robust than a simple spring-loaded keeper, suitable for dynamic or vibrating environments
- Matches Grade 80 chain strength and is normally specified for chain sling systems where reliability is critical
- Powder coated or painted finish resists rust and wear in industrial, marine and outdoor service conditions
- Standardized dimensions and working load limits allow direct replacement in existing rigging setups
- Shank design allows secure attachment to chain links without pinching or misalignment
Application Scenarios
Where G80 Shank Self-Locking Hook US Type Is Used
- Lifting heavy steel beams and structural components using Grade 80 chain slings in construction and infrastructure projects
- Material handling in manufacturing plants where chain slings are used to move large machinery parts
- Offshore and marine applications involving chain rigging for mooring, anchoring or deck cargo
- Rigging setups in mining and energy sectors where chain slings are preferred for durability and load capacity
- Heavy-duty lifting operations in ports and logistics hubs with repeated cycle use and exposure to weather
Who It Is For
Buyers This Product Is Built For
- Rigging contractors sourcing chain sling hardware with reliable hook components
- Manufacturers specifying Grade 80 chain slings for internal lifting and assembly processes
- Marine and offshore service providers needing durable, self-locking hooks for chain rigging
- Industrial distributors stocking Grade 80 rigging hardware for a complete chain sling solution
- Procurement engineers requiring a hook that matches the chain grade and maintains system integrity
Problems It Solves
Problems This Product Removes
- Accidental hook opening during lift due to vibration or shock when using a standard hook with spring latch
- Mismatched hook strength in chain sling systems where a lower-grade hook compromises the chain’s rated capacity
- Lack of positive locking in high-vibration environments like crane operations or transport rigging
- Inconsistent or missing traceability in hook components that are not stamped with working load limit
- Need to source a hook and chain from separate suppliers, increasing coordination and quality risk
- Corrosion and surface degradation in outdoor or wet environments due to bare steel finish
Technical Features
Technical Features
- Drop forged alloy steel body quenched and tempered for high strength and toughness
- Self-locking pin with positive latch mechanism that remains closed until load is released
- Working load limit stamped on the hook body for traceability and field identification
- Minimum breaking strength four times the working load limit as per standard design factor
- Proof load tested before release
- Powder coated or painted surface finish to resist rust and abrasion
- Standardized dimensions for compatibility with Grade 80 chain links and slings
- Shank design allows secure and aligned connection to chain without misalignment
Specifications
G80 Shank Self-Locking Hook US Type Specifications
Values published in the Kailipu catalogue for this item. Anything not listed is available on request.
| Capacity Range | 5/16 to 3/8 inch |
|---|---|
| Material | Alloy steel quenched and tempered |
| Grade | G80 |
| Design Factor | 4:1 minimum breaking load to working load limit |
| Proof Load | the published multiple of the working load limit |
| Surface Finish | Powder coated or painted |
| Working Load Limit | 4500 lbs at 5/16-8, 7100 lbs at 3/8-8 |
| Breaking Load | 18000 lbs at 5/16-8, 28400 lbs at 3/8-8 |
| Dimensions | A 25.4 mm, L 199 mm, Φ 42 mm, H 29.5 mm at 5/16-8; A 29 mm, L 243 mm, Φ 55 mm, H 34.5 mm at 3/8-8 |
| Weight | 2.80 kg per piece at 5/16-8, 4.34 kg per piece at 3/8-8 |
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
- Alloy steel body drop forged then quenched and tempered for high tensile strength and fatigue resistance
- Self-locking pin made from hardened steel to resist deformation under repeated loading
- Powder coating or paint applied over the forged body to resist corrosion in humid or wet environments
- No galvanizing or plating used; finish is selected based on service environment and customer request
Manufacturing Process
How This Product Is Made
1Drop forging of the hook blank from alloy steel billet
2Quench and temper heat treatment to achieve required hardness and strength
3Machining of the shank, hook throat, and pin bore to precise tolerances
4Assembly of the self-locking pin and latch mechanism
5Surface finishing by powder coating or painting
6Stamping of working load limit and grade marking on the body
7Proof load testing and dimensional inspection before packing
Quality Control
Quality Control On Every Batch
- Proof load test performed on production batches at the published multiple of the working load limit
- Dimensional tolerance check against published size table for each size
- Breaking strength validation to confirm minimum 4:1 design factor
- Visual and functional check of the self-locking mechanism for free movement and secure closure
- Material Test Certificate to EN 10204 3.1 supplied with orders
- Third-party inspection accepted at the Qingdao warehouse before shipment
Documentation
Certification And Documentation Supplied
- Material Test Certificate to EN 10204 3.1 supplied with orders
- Working load limit and grade stamped on the hook body
- Proof load tested and breaking strength validated per standard
Customisation
Customisation Options
- Custom tonnage stamping on the hook body for specific project or client requirements
- Private label and OEM marking available for branded rigging suppliers
- Surface finish to order in powder coating or painting, including custom colors
- Sizes and dimensions built to a supplied drawing or specification
- Packing configuration adjusted for carton count, pallet pattern, or retail display
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 spring latch hook | The self-locking pin is more resistant to accidental opening under shock or vibration and does not rely on spring tension that can weaken over time |
| Screw pin hook | The self-locking mechanism is more secure and does not require a separate pin nut or cotter pin, reducing the chance of missing components |
| Non-locking shank hook | The positive latch prevents unhooking during lift, which is critical in chain sling applications where load release could cause damage or injury |
| Grade 70 shank hook | The G80 version has higher strength and breaking load, suitable for heavier-duty chain sling systems where Grade 80 chain is used |
Use Guide
How To Use And Inspect G80 Shank Self-Locking Hook US Type
- Verify the stamped working load limit matches the calculated load, not the equipment rating
- Inspect the self-locking mechanism before each use to ensure it moves freely and closes securely
- Ensure the hook is fully engaged on the chain link and the shank is aligned with the load path
- Do not use if the latch is bent, the pin is loose, or the marking is illegible
- Retire the hook if the body shows deformation or the pin cannot close properly
- Keep the hook clean and dry; inspect the finish for wear or damage in corrosive environments
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Answers
G80 Shank Self-Locking Hook US Type FAQ
What is the design factor for this hook?
A standard 4:1 design factor applies, so the minimum breaking strength is four times the stated working load limit. Proof load testing is performed at the published multiple of the working load limit.
Can the self-locking pin be opened under load?
No. The latch is designed to remain closed until the load is fully released. It cannot open during lifting or lowering.
Is a Material Test Certificate available?
Yes. A Material Test Certificate to EN 10204 3.1 is supplied with every order. It confirms the material composition and mechanical properties.
What surface finishes are available?
Standard finishes are powder coated or painted. Custom colors and finishes are available on request for OEM or private label orders.
Can you stamp a custom working load limit?
Yes. Custom tonnage stamping is available on the hook body. The marking will be clear and traceable for field use.
How are the hooks packed for export?
They are packed in cartons, then palletized. We can adjust the carton count and pallet pattern to match your warehouse or retail requirements.
What sizes are available?
The range is from 5/16 to 3/8 inch. The full dimensions and weight are listed in the specifications table for each size.
Need A Quote On G80 Shank Self-Locking Hook US Type
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.