G43 and G70 Hooks
Clevis Slip Hook Grade 70 Yellow Zinc-Plated A331
A drop-forged alloy steel clevis slip hook rated for Grade 70 chains, with a yellow zinc-plated finish and a slip-style opening that allows chain movement during connection and adjustment. Designed for use in towing, transport, and fleet operations where frequent rehooking and flexibility are required. Available in sizes from 1/4" to 3/4" with working load limits from 2750 lbs to 19250 lbs.
- Size
- From 1/4" to 3/4"
- Material
- Alloy Steel
- Finish
- Yellow Zinc-Plated
- 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 70 A331 Gives You
- Slip-style hook opening allows chain to move freely, reducing resistance during connection and adjustment
- Yellow zinc-plated finish resists corrosion in outdoor and wet environments
- Drop-forged alloy steel body with quench and temper treatment ensures high strength and impact resistance
- Clevis pin design enables fast installation and secure attachment to Grade 70 chains
- Standard 4:1 design factor ensures consistent safety margin across all sizes
- No need to disconnect the chain to reposition or adjust tension during field use
- Lightweight and compact for easy handling on trailers and recovery vehicles
Application Scenarios
Where Clevis Slip Hook Grade 70 A331 Is Used
- Towing and roadside recovery operations where chain tension shifts and rehooking is frequent
- Flatbed trailer load securement with Grade 70 chains requiring quick adjustments
- Municipal and utility fleet operations using chain tie-downs on equipment and toolboxes
- Farm and construction site transport where chains are repositioned multiple times daily
- Vehicle service fleet maintenance where chain connections are made and broken regularly
- Transport operations involving variable load shapes and shifting center of gravity
Who It Is For
Buyers This Product Is Built For
- Towing and recovery service providers needing flexible chain connections
- Fleet operators managing flatbed or cargo trailers with frequent tie-down cycles
- Municipal and utility departments using chain securement on service vehicles
- Construction and farm equipment transporters requiring durable, reusable hardware
- Distributors sourcing Grade 70 slip hooks for resale in rigging and transport markets
Problems It Solves
Problems This Product Removes
- Chain getting stuck or jammed during connection due to rigid hook design
- Need to disconnect and reconnect chains repeatedly during load securement
- Corrosion damage from exposure to rain, salt, and road debris on uncoated hooks
- Inadequate strength or durability in hooks that fail under repeated use
- Lack of flexibility in standard grab hooks when dynamic adjustments are needed
- Buying slip hooks and grab hooks from separate suppliers for different applications
Technical Features
Technical Features
- Drop-forged alloy steel body with quench and temper heat treatment
- Slip-style hook opening with free movement of chain inside the hook
- Clevis pin and nut assembly for secure attachment to Grade 70 chains
- Yellow zinc-plated surface finish for corrosion resistance
- Standard 4:1 design factor with minimum breaking load four times the WLL
- Working load limit stamped on the body for traceability
- Threaded pin with nut for secure fastening and field adjustment
Specifications
Clevis Slip Hook Grade 70 A331 Specifications
Values published in the Kailipu catalogue for this item. Anything not listed is available on request.
| Capacity Range | 2750 lbs to 19250 lbs safe working load |
|---|---|
| Material | Drop forged alloy steel quenched and tempered |
| Grade | Grade 70 |
| Design Factor | 4:1 minimum breaking load to safe working load |
| Surface Finish | Yellow zinc-plated |
| 1/4" Dimensions | A 11 B 27 E 23.5 L 100 mm weight 0.55 lbs |
| 5/16" Dimensions | A 12.5 B 33 E 26 L 114 mm weight 0.82 lbs |
| 3/8" Dimensions | A 15 B 39 E 32 L 132.5 mm weight 1.21 lbs |
| 7/16" Dimensions | A 17 B 44 E 40 L 147 mm weight 2.09 lbs |
| 1/2" Dimensions | A 19 B 48 E 42.5 L 166 mm weight 2.99 lbs |
| 5/8" Dimensions | A 18.5 B 58.7 E 51 L 200.5 mm weight 4.85 lbs |
| 3/4" Dimensions | A 30.5 B 81 E 64.5 L 257 mm weight 11.28 lbs |
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 strength and toughness
- Yellow zinc-plated coating applied to resist rust and corrosion in outdoor use
- Threaded clevis pin and nut made from hardened steel for secure fastening
- No plastic or non-metal components used in the load-bearing structure
Manufacturing Process
How This Product Is Made
1Drop forging of the hook and clevis blanks
2Quench and temper heat treatment to achieve required hardness and strength
3Machining of the hook opening, pin bore, and thread on the clevis pin
4Assembly of the clevis pin and nut
5Yellow zinc plating of the entire hook body
6Proof load testing on production batches
7Working load limit stamping and final inspection
Quality Control
Quality Control On Every Batch
- Proof load test on each production batch before release
- Dimensional tolerance check against the published size table
- Breaking strength validation to confirm the 4:1 design factor
- Visual inspection for plating defects, cracks, or surface imperfections
- 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 for distributors and fleet brands
- Custom surface finish including zinc plating, powder coating, or electrophoretic black
- Custom packing configuration in cartons or gunny bags on pallets
- Bulk packaging tailored to warehouse or retail distribution 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 |
|---|---|
| Clevis Grab Hook | The slip hook allows chain movement during adjustment, while the grab hook holds the chain in place for fixed-length connections |
| Screw Pin Hook | The clevis pin with nut is faster to install and less likely to loosen under vibration than a screw pin |
| Rigid Hook | The slip design reduces friction and allows easier chain routing, but a rigid hook may be more stable under constant tension |
| Overhead Lifting Hook | This hook is not rated for overhead lifting and should not be used in vertical hoisting applications |
Use Guide
How To Use And Inspect Clevis Slip Hook Grade 70 A331
- Use only with Grade 70 chains; do not use with lower-grade or synthetic chains
- Ensure the chain is fully seated inside the hook opening before applying load
- Check the clevis pin nut is tightened and the cotter pin is in place before use
- Inspect the hook for deformation, plating damage, or pin wear before each use
- Do not use if the working load limit marking is illegible or damaged
- Retire the hook if the body shows any signs of bending or cracking
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
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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Answers
Clevis Slip Hook Grade 70 A331 FAQ
Can this hook be used for overhead lifting?
No. This clevis slip hook is rated for transport and tie-down applications only, not for overhead lifting or hoisting.
What is the difference between a slip hook and a grab hook?
A slip hook allows the chain to move freely inside the hook, enabling quick adjustments. A grab hook holds the chain link in place for a fixed connection.
Is the yellow zinc-plated finish durable in saltwater environments?
Yes. The yellow zinc plating offers good corrosion resistance, but prolonged exposure to saltwater may require re-plating or inspection.
What safety factor does this hook have?
A standard 4:1 design factor, meaning the minimum breaking load is four times the stated safe working load.
Can you supply Material Test Certificates?
Yes. A Material Test Certificate to EN 10204 3.1 is supplied with each order on request.
What sizes are available?
Sizes range from 1/4" to 3/4" with working load limits from 2750 lbs to 19250 lbs.
How are the hooks packed for export?
Standard packing is in cartons or gunny bags, then palletized. Custom packing configurations are available for bulk or retail distribution.
Need A Quote On Clevis Slip Hook Grade 70 A331
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