Spring Snap Hooks and Quick Links
Spring Hook with Screw Nut and Eyelet Carabiner
A spring-loaded hook with a screw-type eyelet and threaded nut, designed for secure, quick-connect rigging in industrial and marine applications. The hook body is forged from high-strength carbon steel or stainless steel, with a threaded eyelet and locking nut to prevent accidental disengagement. Sizes range from 5mm to 14mm in diameter, with working load limits from 220 lbs to 1600 lbs. Available in galvanized, oxide, or spray-painted finishes, and supplied in cartons on pallets.
- Size
- From dia 5mm-14mm
- Material
- Carbon Steel/SS304/SS316 Surface: Galvanized/Oxide/Spray paint
- Packing
- Cartons + Pallets
- Catalogue Family
- Spring Snap Hooks and Quick Links
- 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 Spring Hook W Screw Eyelet Gives You
- Spring-loaded mechanism allows one-handed operation for fast connection and release under load
- Threaded eyelet with locking nut prevents accidental disengagement during dynamic or vibrating operations
- High-strength carbon steel or stainless steel construction resists deformation under repeated loading
- Galvanized, oxide, or spray-painted surface finishes improve corrosion resistance in harsh environments
- Compact design reduces bulk compared to larger mechanical locking systems
- Clear working load limit stamped on the hook body for traceability and safety compliance
Application Scenarios
Where Spring Hook W Screw Eyelet Is Used
- Marine mooring and anchoring where quick attachment and release of lines is needed on deck or at the dock
- Industrial rigging setups requiring frequent reconnection of slings, chains, or cables
- Construction site hoisting where riggers need to rapidly connect and disconnect lifting gear
- Logistics and transport operations using ratchet straps or tie-downs with quick-release hooks
- Offshore platform maintenance where crew must secure tools and equipment with reliable, vibration-resistant fittings
- Warehouse and factory floor handling where equipment is moved using overhead cranes or manual hoists
Who It Is For
Buyers This Product Is Built For
- Marine equipment suppliers building mooring and anchoring kits for vessels and offshore platforms
- Industrial rigging contractors sourcing reliable, fast-connect hardware for lifting operations
- Logistics and transport companies specifying durable tie-down hooks for trailer and truck cargo
- Construction firms needing quick-release fittings for temporary lifting and rigging setups
- Manufacturers of ratchet straps and tie-down systems integrating secure, reusable hooks
- Maintenance teams in oil and gas or mining operations requiring corrosion-resistant, vibration-proof fittings
Problems It Solves
Problems This Product Removes
- Accidental disengagement of hooks during lifting or pulling due to loose or unsecured pins
- Slow rigging progress caused by the need to manually thread or secure standard hooks
- Corrosion damage in marine or outdoor environments from untreated steel surfaces
- Lack of traceability and safety marking on hooks used in regulated lifting operations
- Inconsistent quality from multiple suppliers when sourcing hooks across different product lines
- Need to source hooks and locking nuts from separate suppliers, increasing procurement complexity
Technical Features
Technical Features
- Spring-loaded hook body with a self-closing mechanism for secure engagement
- Threaded eyelet with a locking nut to prevent accidental opening under load
- Drop-forged construction in high-strength carbon steel or stainless steel 304/316
- Working load limit stamped on the hook body for field traceability
- Available in sizes from 5mm to 14mm diameter with corresponding WLLs from 220 lbs to 1600 lbs
- Surface finishes: galvanized, oxide, or spray paint as standard
- Complies with DIN 5922C standard for spring snap hooks
- Threaded nut and eyelet allow secure, repeatable connection without tools
Specifications
Spring Hook W Screw Eyelet Specifications
Values published in the Kailipu catalogue for this item. Anything not listed is available on request.
| Size Range | 5mm to 14mm diameter |
|---|---|
| Working Load Limit | 220 lbs to 1600 lbs |
| Material | High-strength carbon steel, stainless steel 304, stainless steel 316 |
| Surface Finish | Galvanized, oxide, spray paint |
| Standard | DIN 5922C |
| Hook Type | Spring-loaded with screw eyelet and nut |
| 5mm Dimensions | A 5 mm B 25 mm C 50 mm D 5 mm F 7 mm WLL 220 lbs |
| 14mm Dimensions | A 14 mm B 86 mm C 180 mm D 17 mm F 35 mm WLL 1600 lbs |
| Weight | 2.1 kg per 100 pcs at 5mm, 52 kg per 100 pcs at 14mm |
| Packing | Cartons on pallets, standard configuration |
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
- High-strength carbon steel for the hook body, drop forged for impact resistance
- Stainless steel 304 or 316 for corrosion-resistant versions in marine or chemical environments
- Galvanized coating to resist rust and oxidation in outdoor or wet conditions
- Oxide or spray paint finish for additional surface protection and visual identification
- Threaded eyelet and locking nut made from the same base material as the hook body
Manufacturing Process
How This Product Is Made
1Drop forging of the hook blank from carbon steel or stainless steel billet
2Heat treatment to achieve required hardness and tensile strength
3Machining of the eyelet thread and nut interface
4Assembly of the spring mechanism and threaded eyelet
5Surface treatment: galvanizing, oxide coating, or spray painting
6Stamping of the working load limit and material grade on the hook body
7Proof load testing on production batches
8Packing in cartons on pallets for export
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 WLL rating
- Visual inspection for surface defects, cracks, or coating flaws
- Working load limit and material marking verified on each unit
- Third-party inspection accepted at the Qingdao warehouse before shipment
Customisation
Customisation Options
- Custom tonnage stamping on the hook body to match customer-specific WLLs
- Private label and OEM marking available for brand integration
- Custom surface finish including zinc plating, powder coating, or electrophoretic black
- Custom sizes and dimensions built to a supplied drawing
- 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 |
|---|---|
| Screw Pin Hook | The screw nut version offers faster connection and better resistance to vibration than a screw pin, which can loosen over time |
| Lever Lock Hook | The spring-loaded design allows one-handed operation, while lever locks require two hands and are more prone to accidental opening |
| Snap Hook with Safety Pin | The screw nut provides a more secure lock than a safety pin, which can be lost or fail under repeated use |
| Standard Eye Hook | The spring hook enables quick release and reconnection, while an eye hook requires threading and is slower to use |
Use Guide
How To Use And Inspect Spring Hook W Screw Eyelet
- Ensure the working load limit stamped on the hook matches the calculated load, not the equipment rating
- Inspect the spring mechanism for free movement and absence of binding before each use
- Tighten the threaded nut securely after each connection to prevent accidental opening
- Do not exceed the rated WLL under dynamic or shock loading conditions
- Check for deformation, cracks, or wear on the hook body and eyelet before each use
- Retire the hook if the spring fails to close, the nut cannot be tightened, or the marking is illegible
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Answers
Spring Hook W Screw Eyelet FAQ
What standards do these spring hooks comply with?
They comply with DIN 5922C for spring snap hooks. Material Test Certificates to EN 10204 3.1 are supplied on request.
Can the working load limit be customized?
Yes. Custom tonnage stamping is available to match your specific load requirements.
What materials are available?
Standard materials are high-strength carbon steel, stainless steel 304, and stainless steel 316. Other alloys can be built to drawing.
What surface finishes are offered?
Galvanized, oxide, and spray paint finishes are standard. Custom finishes including powder coating and electrophoretic black are available.
How are they packed for export?
Supplied in cartons on pallets. We can adjust carton count and pallet pattern to suit your warehouse or retail pack.
Can you provide a Material Test Certificate?
Yes. A Material Test Certificate to EN 10204 3.1 is supplied on request with every order.
Is third-party inspection available?
Yes. Third-party inspection is accepted at our Qingdao warehouse before shipment.
Need A Quote On Spring Hook W Screw Eyelet
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.