Towing and Recovery Chains
Grade 70 Trailer Safety Chain with Clevis Slip Hook, Heavy Duty Transport Towing Chain
A heavy-duty trailer safety chain made from Grade 70 carbon steel, heat-treated for high tensile strength and wear resistance. Each chain is 35 inches long and available in 1/4", 5/16", and 3/8" sizes, fitted with a clevis slip hook featuring a spring-loaded safety latch. Designed to meet DOT and NACM standards, it provides secure, reliable tie-down for commercial trailers, agricultural equipment, and logistics transport under extreme conditions.
- Size
- 1/4" , 5/16", 3/8". Chain
- Working Load Limit
- 4,700 lbs, 6,250 lbs, 6,600 lbs. Breaking Strength: 18,800 lbs, 25,000 lbs, 26,400 lbs End Fitting: 5/16", 3/8
- Catalogue Family
- Towing and Recovery Chains
- 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 Trailer Safety Chain Gives You
- Grade 70 carbon steel body with heat treatment delivers high tensile strength and resistance to deformation under heavy load
- Yellow chromate zinc plating resists corrosion from road salt, moisture, and outdoor exposure
- Clevis slip hook with spring-loaded safety latch prevents accidental disengagement during transit
- Meets or exceeds DOT and NACM standards for trailer safety and tie-down applications
- 35-inch length provides consistent reach across standard trailer hitch configurations
- Working load limit and breaking strength clearly marked on the chain for traceability
- One-piece assembly with retainer ensures the hook stays attached during use
Application Scenarios
Where Grade 70 Trailer Safety Chain Is Used
- Securing commercial trailers and flatbeds during long-haul transport where sudden stops or road hazards require fail-safe tie-down
- Agricultural equipment towing on rough terrain where chain fatigue and impact are common
- Industrial logistics operations requiring repeatable, reliable safety chains for yard and site transport
- Trailer manufacturers (OEMs) integrating safety chains into new trailer builds with consistent compliance
- Fleet operators replacing worn or non-compliant chains in their recovery and transport vehicles
Who It Is For
Buyers This Product Is Built For
- Trailer manufacturers (OEMs) sourcing direct supply for new trailer builds
- Industrial wholesalers distributing safety chains to logistics and transport providers
- Rigging hardware importers requiring compliant, high-strength chains for export
- Fleet managers replacing safety chains in commercial transport vehicles
- Logistics companies specifying DOT and NACM-compliant chains for their trailer fleets
Problems It Solves
Problems This Product Removes
- Accidental disengagement of safety chains during transit due to loose or unsecured hooks
- Corrosion and premature failure of chains in salt-laden or wet environments
- Inconsistent load capacity across different chain sizes leading to overloading or under-specification
- Lack of traceability and certification for chains used in regulated transport operations
- Need to source chains and hooks from separate suppliers, increasing procurement complexity
- Non-compliance with DOT or NACM standards leading to inspection failures or liability
Technical Features
Technical Features
- Grade 70 carbon steel chain body, heat-treated for high tensile strength
- 35-inch standard length with consistent end-to-end dimensions
- Clevis slip hook with spring-loaded safety latch for secure connection
- Retainer included to prevent hook loss during handling
- Yellow chromate zinc plating for corrosion resistance
- Working load limit and breaking strength stamped on the chain
- Clear marking of chain size, grade, and length for field identification
Specifications
Grade 70 Trailer Safety Chain Specifications
Values published in the Kailipu catalogue for this item. Anything not listed is available on request.
| Chain Grade | Grade 70 |
|---|---|
| Chain Size | 1/4", 5/16", 3/8" |
| Chain Length | 35 inches |
| Working Load Limit | 3,150 lbs (1,430 kg) for 1/4", 4,700 lbs (2,130 kg) for 5/16", 6,600 lbs (3,000 kg) for 3/8" |
| Minimum Breaking Strength | 12,600 lbs (5,715 kg) for 1/4", 18,800 lbs (8,530 kg) for 5/16", 26,400 lbs (12,000 kg) for 3/8" |
| Hook Type | Clevis slip hook with spring-loaded safety latch |
| Finish | Yellow chromate zinc plated |
| Unit Weight | Approx. 1.22 kg for 1/4", 1.92 kg for 5/16", 2.67 kg for 3/8" |
| Standards | DOT, NACM compliance |
Materials
Materials And Finishes
- Grade 70 carbon steel chain body, heat-treated for high tensile strength and wear resistance
- High-quality yellow chromate zinc plating for corrosion protection
- Clevis slip hook made from Grade 70 carbon steel with spring-loaded latch
- Retainer to secure the hook during transport and handling
Manufacturing Process
How This Product Is Made
1Raw material selection and inspection for Grade 70 carbon steel
2Chain forming and heat treatment to achieve required tensile properties
3Clevis slip hook fabrication and heat treatment
4Assembly of chain and hook with retainer
5Surface finishing with yellow chromate zinc plating
6Stamping of WLL, grade, size, and length on the chain
7Final inspection and 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 minimum 4:1 design factor
- Visual and functional check of the spring-loaded latch and hook operation
- Material Test Certificate to EN 10204 3.1 supplied with orders
- Third-party inspection accepted at the China warehouse before shipment
Customisation
Customisation Options
- Custom chain sizes and lengths built to a drawing
- Custom tonnage stamping and marking on the chain
- Private label and OEM marking available
- Custom surface finish including zinc plating, powder coating, or electrophoretic black
- Custom carton and pallet packing configuration
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 |
|---|---|
| Grade 43 Safety Chain | Grade 70 offers 40% higher breaking strength and better wear resistance, suitable for commercial and heavy-duty use, while Grade 43 is for light-duty applications |
| Screw Pin Hook Chain | Clevis slip hook with latch allows faster connection and disconnection than a screw pin, but screw pin chains offer more adjustability and are easier to inspect for wear |
| Wire Rope Safety Chain | Steel chain provides higher abrasion resistance and durability in rough terrain, while wire rope is lighter and more flexible but more prone to kinking and damage |
| Non-plated Chain | Yellow chromate zinc plating extends service life in corrosive environments, while uncoated chains degrade faster in salt and moisture |
Use Guide
How To Use And Inspect Grade 70 Trailer Safety Chain
- Verify the stamped working load limit matches the calculated load, not the vehicle or trailer rating
- Inspect the chain and hook for deformation, cracks, or worn surfaces before each use
- Ensure the spring-loaded latch on the clevis hook operates freely and locks securely
- Do not exceed the rated working load limit under any condition
- Keep the chain dry and clean; inspect after exposure to salt, mud, or chemicals
- Retire the chain if the marking is illegible, the hook is bent, or the latch fails to hold
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Answers
Grade 70 Trailer Safety Chain FAQ
What standards do these chains meet?
These chains are engineered to meet or exceed DOT and NACM standards for trailer safety and tie-down applications.
Can I get a Material Test Certificate?
Yes. A Material Test Certificate to EN 10204 3.1 is supplied with every order on request.
What is the working load limit for the 5/16" chain?
The working load limit for the 5/16" chain is 4,700 lbs (2,130 kg).
Is the chain available in custom lengths?
Yes. Custom chain lengths and sizes can be built to a drawing or specification.
What finish is applied to the chain?
The chain is finished with a yellow chromate zinc plating for corrosion resistance.
Can I have my own brand stamped on the chain?
Yes. Custom tonnage stamping, private label marking, and OEM branding are available.
How are the chains packed for export?
Chains are packed in cartons on pallets. We can configure the carton count and pallet pattern to suit your warehouse or retail pack. Free warehouse storage in Qingdao is available for up to two months to consolidate shipments.
Need A Quote On Grade 70 Trailer Safety Chain
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