Yellow zinc-plated steel wire hook with triangular loop and twin prongs on white background

Tie Down Hardware

DOUBLE J HOOK

A double J hook with a tubular shank, designed for secure attachment in tie-down and rigging applications. Available in sizes from 1-1/2" to 4", with working load limits ranging from 800KG to 10,000KG. The hook body is drop forged from alloy steel, heat treated for strength, and marked with the safe working load and manufacturer's code. It is used with ratchet straps, chain, or wire rope to anchor loads on trailers, trucks, and industrial equipment.

Size: 4" DOUBLE J HOOK, BS:10000KG/22000LBS 3" DOUBLE J HOOK, BS:10000KG/22000LBS 2" DOUBLE J HOOK, BS:5000KG/11000L
Catalogue Family: Tie Down Hardware
Certificates: EN 10204 3.1 material test certificate on request

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Key Benefits

What Double J Hook Gives You

Drop-forged alloy steel construction provides high tensile strength and impact resistance
Tubular shank reduces weight while maintaining structural integrity under load
Clear WLL marking on the body ensures traceability and safe usage
Dual-rated 1-1/2″ hook allows use at either 2000KG or 3000KG depending on application

Standard 4:1 design factor ensures consistent safety margins across all sizes
Smooth internal radius prevents rope or strap chafing at the throat
Compatible with ratchet straps, chain, and wire rope for versatile load securing

Application Scenarios

Where Double J Hook Is Used

Securing heavy machinery and industrial components on flatbed trailers during long-haul transport
Anchoring steel coils and fabricated metal parts on cargo decks where vibration and shock are present
Mounting on truck chassis for ratchet strap tie-down systems in logistics and freight operations

Fixing large structural components in construction sites where temporary load restraint is required
Supporting heavy equipment in port and terminal handling operations with repeated loading cycles
Used in mining and quarrying to secure bulk material containers and transport frames

Who It Is For

Buyers This Product Is Built For

Logistics and freight operators specifying tie-down hardware for commercial transport
Truck and trailer fleet managers sourcing durable anchor points for load securing
Manufacturers of ratchet straps and tie-down kits requiring reliable hook components

Industrial contractors installing temporary rigging systems on site
Marine and offshore logistics providers handling heavy cargo on deck and in storage

Problems It Solves

Problems This Product Removes

Frequent hook failure due to thin or weak shank sections in low-grade tie-down hardware
Unclear or missing WLL marking leading to overloading and safety risks
Inconsistent design factors across different hook models causing confusion in load planning

Rope or strap damage at the throat of the hook due to sharp internal edges
Need to source hooks and ratchet straps from separate suppliers, increasing procurement complexity
Lack of traceability in the field when a hook fails or requires inspection

Technical Features

Drop-forged alloy steel body with heat treatment for strength and durability
Tubular shank design to reduce weight without sacrificing load capacity
Clear WLL stamping on the body for immediate identification and safety compliance
Standard 4:1 design factor with minimum breaking load four times the safe working load

Smooth internal throat radius to prevent rope and strap abrasion
Available in sizes from 1-1/2″ to 4″ with corresponding WLL ratings
Dual-rated 1-1/2″ hook with two WLL values stamped for different use cases

Specifications

Double J Hook Specifications

Values published in the Kailipu catalogue for this item. Anything not listed is available on request.

Size Range	1-1/2″ to 4″ hook diameter
Material	Drop forged alloy steel heat treated
Design Factor	4:1 minimum breaking load to safe working load
WLL Marking	Stamped on body for traceability

Materials

Materials And Finishes

Alloy steel blank drop forged into the hook shape
Heat-treated after forging to achieve required tensile strength
Smooth internal throat surface machined to prevent rope damage

Stainless steel or carbon steel used for the pin depending on application
Surface finish available in zinc plating or powder coating on request

Manufacturing Process

How This Product Is Made

1Drop forging of the hook blank from alloy steel billet

2Heat treatment to achieve desired hardness and strength

3Machining of the throat and shank to final dimensions

4WLL stamping and marking on the body

5Surface finishing by zinc plating or powder coating if specified

6Proof load testing on production batches

7Packing and preparation for export

Quality Control

Quality Control On Every Batch

Proof load test on each production batch before release
Dimensional tolerance check against published size table
Breaking strength validation to confirm 4:1 design factor

Visual inspection for cracks, burrs, or surface defects
Material Test Certificate to EN 10204 3.1 issued with the order
Third-party inspection accepted at the China warehouse before shipment

Customisation

Customisation Options

Custom tonnage stamping on the hook body
Private label and OEM marking available
Surface finish options: zinc plating, powder coating, or electrophoretic black

Custom pin configuration and length built to drawing
Packing configuration tailored to carton, pallet, or retail pack requirements

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 round shank hook	The tubular shank reduces weight and improves strength-to-weight ratio but may have lower resistance to side loading
Screw pin hook	The double J hook offers faster engagement and release than a screw pin, but lacks the fine adjustment of a threaded pin
Screw link hook	The double J hook has a more robust throat opening and better resistance to deformation under shock loads
Cast hook	Drop-forged construction provides higher impact strength and fatigue resistance compared to cast steel

Use Guide

How To Use And Inspect Double J Hook

Always verify the stamped WLL matches the calculated load before use
Ensure the hook is not twisted or deformed before attaching to a strap or chain
Do not use the hook if the throat opening is stretched or the body shows cracks
Inspect the pin and shank for wear or corrosion before each use
Avoid side loading the hook; keep the pull aligned with the hook’s axis
Replace the hook if the WLL marking is illegible or the body shows permanent deformation