G43 and G70 Hooks
Grade 70 Bolt-On Grab Hook with Backer Plate
A heavy-duty, weld-free grab hook made from heat-treated Grade 70 alloy steel, designed for permanent or semi-permanent chain attachment on tractor front-end loaders, excavator buckets, trucks, and flatbed trailers. It features a solid backer plate, high-grade hex bolts, and nylon lock nuts to resist vibration and shear forces during heavy hauling. The bolt-on design eliminates welding and distributes load stress evenly across mounting surfaces.
- Size
- 5/16" , 3/8"
- Grade
- Grade 70 / G70 Hook
- Material
- Heat-Treated Alloy Steel
- Finish
- Yellow Zinc Plated / Painted / Custom Application Chain Tie-Down, Towing, Cargo Securement
- Type
- Grab Hook Mounting
- 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 Grade 70 Bolt-On Grab Hook with Backer Plate Gives You
- No welding required—installed with basic tools using pre-drilled holes
- Reinforced backer plate spreads load stress and reduces mounting surface fatigue
- High-strength Grade 70 alloy steel provides excellent tensile strength and impact resistance
- Secure grab hook profile holds chain links firmly under vibration and dynamic load
- Yellow zinc plating resists corrosion in outdoor and harsh environments
- Compatible with Grade 70 transport chain for consistent load performance
- Reduces stress concentration on thin or weak mounting surfaces like bucket flanges
Application Scenarios
Where Grade 70 Bolt-On Grab Hook with Backer Plate Is Used
- Mounting chain attachment points on excavator buckets for material handling and loading
- Securing cargo on flatbed trailers using a permanent tie-down anchor without welding
- Attaching towing chains to tractor front-end loaders for recovery and hauling
- Installing rigid chain points on industrial trucks and utility vehicles for consistent load binding
- Reinforcing weak mounting areas on older trailers or equipment where welding is not feasible
- Setting up semi-permanent rigging points on construction site machinery for repetitive use
Who It Is For
Buyers This Product Is Built For
- Truck and trailer manufacturers building flatbeds with integrated chain tie-downs
- Construction and mining equipment operators needing durable, field-installable rigging points
- Fleet managers specifying permanent cargo securement hardware for long-haul transport
- Equipment rebuilders and repair shops installing replacement grab hooks without welding
- Rigging distributors offering bolt-on solutions for customers avoiding thermal distortion
Problems It Solves
Problems This Product Removes
- Need for welding on site or in the shop to install a chain hook on thin or sensitive metal
- Mounting points failing under vibration due to stress concentration on small bolt holes
- Chain slipping out of a hook during transport due to poor engagement or loose fit
- Corrosion damage on hooks used in outdoor or wet environments without proper coating
- Inconsistent load transfer from chain to mounting surface due to weak or flexible attachment
- Buying a hook and backer plate from separate suppliers, leading to mismatched hole patterns or materials
Technical Features
Technical Features
- Drop-forged body in heat-treated Grade 70 alloy steel for high tensile strength
- Solid steel backer plate with matching pre-drilled mounting holes for even load distribution
- High-grade hex bolts and nylon lock nuts to prevent loosening under vibration
- Grab hook profile designed to hold Grade 70 chain securely with positive engagement
- Yellow zinc plating with chromate finish for corrosion resistance in outdoor service
- Bolt-on mounting with no welding required—installed using standard shop tools
- Standard 4:1 design factor applied unless otherwise stated, with WLL stamped on the hook
Specifications
Grade 70 Bolt-On Grab Hook with Backer Plate Specifications
Values published in the Kailipu catalogue for this item. Anything not listed is available on request.
| Material | Heat-treated alloy steel Grade 70 / G70 |
|---|---|
| Hook Type | Grab Hook |
| Mounting Type | Bolt-On with Backer Plate |
| Finish | Yellow Zinc Plated / Painted / Custom |
| Size Range | 5/16”, 3/8” |
| Grade | Grade 70 / G70 |
| Working Load Limit | Stamped on hook body for traceability |
Materials
Materials And Finishes
- Heat-treated alloy steel Grade 70 for high tensile strength and impact resistance
- Solid steel backer plate to distribute load across mounting surface
- High-grade hex bolts for shear strength and durability under dynamic load
- Nylon lock nuts to prevent loosening under vibration
- Yellow zinc plating with chromate finish for corrosion resistance
Manufacturing Process
How This Product Is Made
1Drop forging of the hook and backer plate blanks
2Heat treatment of the alloy steel to achieve Grade 70 strength properties
3Machining of the hook profile and pre-drilled mounting holes
4Assembly of the backer plate with matching bolt holes
5Surface finishing by yellow zinc plating or custom coating
6Stamping of working load limit and grade marking on the hook
7Proof load testing and final 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 4:1 design factor
- Visual inspection of weld-free joint and bolt hole 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
- Custom surface finish including zinc plating, powder coating, or electrophoretic black
- Custom size and hole pattern built to a supplied drawing
- Packing configuration adjusted for carton count and pallet pattern to match buyer’s warehouse
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 |
|---|---|
| Weld-on hook | The bolt-on version avoids thermal distortion and material weakening from welding, but a welded hook may offer slightly higher strength in high-impact applications |
| Screw pin hook | The bolt-on design with lock nuts resists loosening under vibration better than a screw pin, which requires regular inspection |
| Standard grab hook without backer plate | The backer plate reduces stress concentration and improves load distribution, especially on thin or weak mounting surfaces |
| Chain link with bolted eye | The grab hook provides a more secure, positive engagement with chain links and is easier to attach and remove |
Use Guide
How To Use And Inspect Grade 70 Bolt-On Grab Hook with Backer Plate
- Install only on surfaces with sufficient thickness and structural integrity to support the load
- Use the correct bolt size and torque to the manufacturer’s specification to avoid failure
- Ensure the chain link is fully seated in the grab hook before applying load
- Check the nylon lock nut and bolts for tightness after initial use and after long hauls
- Inspect the backer plate and mounting bolts for signs of deformation or fatigue during routine checks
- Retire the hook if the body shows deformation, the finish is worn through, or the WLL marking is illegible
Related Products
Often Ordered With This Item
Bolt-On Tow Hook with Safety Latch
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
8 Inch Clevis Short J Tow Hook Grade 70 Forged Steel WLL 5400LBS
Browse The Category
Industries Using This Product
Sourcing Support For This Product
Guides Worth Reading Before You Order
Answers
Grade 70 Bolt-On Grab Hook with Backer Plate FAQ
Is this hook suitable for Grade 70 chain?
Yes. It is designed and tested for use with Grade 70 transport chain, with compatible dimensions and strength ratings
Can I install this without welding?
Yes. The bolt-on design with pre-drilled holes allows installation using basic tools—no welding or thermal processes required
What is the finish on the hook?
Standard finish is yellow zinc plated with chromate. Custom finishes including powder coating and electrophoretic black are available
What certifications are provided?
A Material Test Certificate to EN 10204 3.1 is supplied on request. Every batch undergoes proof load testing and dimensional checks
Can you stamp our own WLL or brand?
Yes. Custom tonnage stamping, private label marking, and OEM branding are standard options
How is it packed for export?
Cartons on pallets as standard. We can configure carton count and pallet pattern to suit your warehouse or retail pack. Free two-month storage in Qingdao is available
What sizes are available?
Available in 5/16” and 3/8” sizes. The working load limit and dimensions are stamped on the hook body
Need A Quote On Grade 70 Bolt-On Grab Hook with Backer Plate
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.