EN
RUEach batch undergoes tensile strength tests using advanced load-testing equipment to confirm the combi lifting sockets meet or exceed rated Working Load Limits and required safety factors.
1. Higher Standard Products
2. Shorter Production Cycle
3. More Corrosion Resistant
4. More Optional Delivery Methods
5. Comprehensive After Service
The combi lifting socket combines a lifting pin anchor and threaded socket, providing a strong, secure connection for lifting and handling precast concrete elements in construction and infrastructure projects.
Our combi lifting socket range includes various sizes and working load limits (WLL) to match diverse lifting requirements. Each model is precisely machined for accurate dimensions and optimal performance. Detailed parameters cover length, thread size, anchor dimensions, and rated load capacity, ensuring you can select the right product for your precast concrete lifting application. Specifications comply with CE and ISO 9001 standards for safety and reliability in every lifting task.
| Name | Combi Lifting Socket | |||||||||
| Drawings |  | |||||||||
| Material | Stainless Steel / Q345 / Q235 / 20# / Customizable | |||||||||
| Surface | Raw Color, Electro-galvanized, Hot-dip Galvanized | |||||||||
| Safety Factor | ≥ 3 | |||||||||
| Certification | CE / ISO 9001 | |||||||||
| SWL (tons) | THREAD(RD/M) | CODE | L(mm) | DH(mm) | LH(mm) | Lth(mm) | d1(mm) | d2(mm) | k(mm) | hef(mm) |
| 1.3 | 12 | SWS-M/RD12-079 | 79 | 15.5 | 43 | 25 | 10 | 19 | 7.1 | 72 |
| - | 12 | SWS-M/RD12-104 | 104 | 15.5 | 43 | 25 | 10 | 19 | 7.1 | 97 |
| - | 12 | SWS-M/RD12-154 | 154 | 15.5 | 43 | 25 | 10 | 19 | 7.1 | 147 |
| 2.5 | 16 | SWS-M/RD16-079 | 84 | 21.1 | 57 | 28 | 10 | 19 | 7.1 | 77 |
| - | 16 | SWS-M/RD16-108 | 108 | 21.1 | 55 | 27 | 13 | 25 | 8.0 | 100 |
| - | 16 | SWS-M/RD16-133 | 133 | 21.1 | 55 | 27 | 13 | 25 | 8.0 | 125 |
| - | 16 | SWS-M/RD16-183 | 183 | 21.1 | 55 | 27 | 13 | 25 | 8.0 | 175 |
| 4.0 | 20 | SWS-M/RD20-140 | 140 | 27 | 70 | 32 | 16 | 32 | 8.0 | 132 |
| - | 20 | SWS-M/RD20-165 | 165 | 27 | 70 | 32 | 16 | 32 | 8.0 | 157 |
| - | 20 | SWS-M/RD20-190 | 190 | 27 | 70 | 32 | 16 | 32 | 8.0 | 182 |
| - | 20 | SWS-M/RD20-240 | 240 | 27 | 70 | 32 | 16 | 32 | 8.0 | 232 |
| 5.0 | 24 | SWS-M/RD24-173 | 173 | 31 | 83 | 38 | 19 | 32 | 10 | 163 |
| - | 24 | SWS-M/RD24-198 | 198 | 31 | 83 | 38 | 19 | 32 | 10 | 188 |
| - | 24 | SWS-M/RD24-248 | 248 | 31 | 83 | 38 | 19 | 32 | 10 | 238 |
| - | 24 | SWS-M/RD24-298 | 298 | 31 | 83 | 38 | 19 | 32 | 10 | 288 |
| 7.5 | 30 | SWS-M/RD30-213 | 213 | 39.5 | 98 | 56 | 22 | 35 | 10 | 203 |
| - | 30 | SWS-M/RD30-238 | 238 | 39.5 | 98 | 56 | 25 | 40 | 12 | 226 |
| - | 30 | SWS-M/RD30-313 | 313 | 39.5 | 98 | 56 | 25 | 40 | 12 | 301 |
| - | 30 | SWS-M/RD30-363 | 363 | 39.5 | 98 | 56 | 25 | 40 | 12 | 351 |
The combi lifting socket is designed to provide a secure and efficient lifting solution for precast concrete components. Combining a threaded socket with a lifting pin anchor, it offers high strength, consistent performance, and simple installation. HULK Metal ensures every product is produced to strict quality standards, delivering dependable results across construction, civil engineering, and infrastructure projects. Available in multiple configurations to suit different lifting angles, load requirements, and environmental conditions.
A combi lifting socket is a specialized precast concrete lifting component combining a lifting pin anchor (without a spherical head) and a threaded socket. The threaded socket is mechanically squeezed onto the lifting pin anchor, forming a secure, integrated unit. This design allows the socket to be embedded directly into precast concrete elements, creating a strong connection point for lifting and handling. The absence of a spherical head reduces the component size while maintaining load-bearing capability. Combi lifting sockets are typically manufactured from high-strength steel and treated with protective coatings for improved corrosion resistance. They are designed to work with compatible lifting loops, eye bolts, hoist rings. Widely used in construction, infrastructure, and civil engineering projects, combi lifting sockets provide a safe, efficient, and cost-effective method for lifting panels, beams, stairs, and other precast elements with precision and reliability.
The combi lifting socket is cast into the concrete during production, with the threaded socket flush or slightly recessed. A compatible lifting accessory is then screwed into the socket for lifting.
Combi lifting sockets are commonly used for lifting, positioning, and transporting precast concrete elements such as wall panels, stair flights, beams, balconies, and façade units in construction and infrastructure projects.
High strength-to-size ratio for efficient lifting
Corrosion-resistant coating for longer service life
Easy to install and use with standard lifting devices
Customizable sizes and load capacities
Certified for safety and performance
The combi lifting socket is often used as part of a complete lifting system to ensure safe and efficient handling of precast concrete elements. This system can include:
Combi Lifting Socket—the embedded anchor point within the concrete element.
Lifting Loops—flexible steel loops for quick attachment to lifting equipment.
Lifting Eye Bolts—threaded connectors for secure and removable lifting points.
Hoist Rings—swivel or pivot lifting points for angled or rotating lifts.
Chain—strong, adjustable-length links to connect lifting points to cranes or hoists.
Before production starts, our engineers review your drawings, required load capacities, surface treatment preferences, and environmental conditions. This ensures the final combi lifting socket is precisely suited to your project's operational needs, safety demands, and performance expectations.
We purchase high-grade carbon steel or stainless steel from long-term trusted mills. Each batch undergoes tensile strength testing, hardness evaluation, and chemical composition verification to confirm it meets CE and ISO 9001 lifting safety standards before entering production.
The sockets are CNC-machined for precise threads and dimensions, ensuring perfect fit with lifting accessories. We apply protective coatings to extend service life, prevent corrosion, and maintain smooth, consistent threading performance under load.
Anchors are hot-forged or precision-machined for maximum tensile strength. Each anchor is inspected for dimensional accuracy, ensuring optimal fit when pressed into the threaded socket during the assembly process.
At this stage, we check thread depth, straightness, socket wall thickness, and anchor geometry. This prevents defects before assembly, reducing the risk of installation or performance issues in the field.
Using high-tonnage pressing equipment, the threaded socket is permanently attached to the lifting pin anchor. This ensures a secure, non-loosening connection that retains full load capacity throughout its lifespan.
We repeat mechanical, dimensional, and coating checks after assembly. Random samples are subjected to load testing, verifying they meet rated Working Load Limit (WLL) and safety factor requirements.
Each combi lifting socket is individually packed with anti-corrosion wrapping and impact-resistant cartons. We offer flexible shipping schedules, consolidated freight, and warehousing options to align with your project timelines.
Our dedicated after-sales team provides technical assistance, installation guidance, and quick resolution for any quality concerns, ensuring seamless integration into your lifting operations.
A: Standard high-strength carbon steel or stainless steel for enhanced corrosion resistance.
A: Yes, CE and ISO 9001 certifications for safety and performance.
A: Absolutely, we can customize dimensions, threads, and load ratings.
A: Hot-dip galvanizing, zinc plating, or powder coating.
A: Minimum three times safety factor is maintained.
A: Yes, with flexible scheduling and stocked components.
A: Store in dry, covered areas to prevent corrosion.
A: Yes, every batch undergoes tensile, coating, and dimensional checks.
HULK Metal enforces strict quality control at every stage to ensure combi lifting sockets meet higher safety and performance standards. Our inspection process includes dimensional verification, tensile testing, pre-shipment checks, and quantity confirmation. Each product is examined with precision instruments and tested under real load conditions. This multi-step approach guarantees consistent quality, reliability, and compliance with CE and ISO 9001 requirements before reaching your project site.
Each batch undergoes tensile strength tests using advanced load-testing equipment to confirm the combi lifting sockets meet or exceed rated Working Load Limits and required safety factors.
We use calibrated measuring tools to verify thread pitch, socket length, anchor diameter, and tolerances, ensuring precise fit and compatibility with lifting accessories according to your project specifications.
Before delivery, we conduct visual and functional checks for coating quality, assembly integrity, and labeling accuracy, ensuring all sockets meet agreed specifications and quality standards.
Our team counts and verifies each shipment against the purchase order, ensuring the exact quantity is packaged, labeled, and prepared for transport to avoid supply delays or shortages.
HULK Metal operates advanced factories equipped for high-precision combi lifting socket production. Our integrated manufacturing setup covers forging, machining, surface treatment, and assembly under one quality management system. With a skilled workforce and automated lines, we can handle bulk orders with consistent quality and faster lead times. The factory environment is optimized for efficiency, safety, and compliance with CE and ISO 9001 standards, ensuring reliable lifting solutions for global clients.
HULK Metal provides combi lifting sockets with higher standard certification, shorter production cycles, and enhanced corrosion resistance. Our advanced factories and skilled production team ensure precise manufacturing, while quality inspections track every stage. Flexible delivery options and warehousing support faster logistics. Combined with comprehensive after-sales service, we offer reliable, durable, and safe lifting solutions that meet diverse project requirements, giving you confidence in every precast concrete lifting operation.
This section showcases articles and resources related to combi lifting sockets, highlighting installation guides, technical comparisons, and industry best practices. Each article provides insights into proper handling, load testing, and integration with complete lifting systems, including lifting loops, eye bolts, hoist rings, and chains. These resources help engineers, contractors, and project managers understand product applications, safety measures, and optimization tips for precast concrete lifting, ensuring informed decisions and safer, more efficient construction workflows.
Explore a variety of precast concrete accessories designed to complement combi lifting sockets. Examples include lifting loops, lifting eye bolts, hoist rings, chain assemblies, embedded anchors, and threaded inserts. These accessories enhance installation efficiency, load safety, and overall project productivity. Each component is manufactured to high standards, offering durability, corrosion resistance, and compatibility with different lifting systems. By integrating these accessories, construction teams can achieve safer, faster, and more reliable handling of precast concrete elements on-site.
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HULK Metal has supplied tens of millions of Lifting Pin Anchors ranging from 1.3 tons to 32 tons to hundreds of buyers around the world. We have a full range of products and a complete supply chain to provide you with quality services. We provide quality assurance services. Please feel free to inquire.
Q345/CM490/20M2/45#/Others
Galvanized/Black
1.3~45.0
≥3
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The combi lifting socket combines a lifting pin anchor and threaded socket, providing a strong, secure connection for lifting and handling precast concrete elements in construction and infrastructure projects.
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Q345/20#/Stainless steel/Others
Galvanized/Black
8~52
≥3
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Q345/35CrMo/Others
Galvanized/Black/Powder-coat
1.3~32.0
≥5
Precision Casting
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Name Wire Loop Box Precast Concrete Accessories
Molds Full Range Moulds
Materials Wire Rope / Steel Plate / Customized
SL(mm)±10 60 / 80 / 100 / 120 /140
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Q345/20#/Stainless steel/Others
Galvanized
0.8~25.0
6~32
≥3
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As a top metalworking service provider, we want to let every customer experience a sense of security in purchasing, sales, etc., and better realize their value through continuously defining new standards for products and services.
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