EN14399-10 HRC Large Hex Head Bolt Cup Head Bolts Manufacturering Process
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EN 14399-10 HRC Structural Bolt 10.9 Large Hex Head Preloaded Bolt Supplier In China
YOKELINK EN 14399-10 HRC Hex Bolts are high-strength structural bolting assemblies designed for preloaded steel connections. Manufactured in Grade 10.9 alloy steel, these bolts provide calibrated preload, reliable installation, and consistent clamping force for bridges, steel structures, wind towers, and industrial construction projects. Available with plain, HDG, and Geomet coatings, EN14399-10 HRC bolts ensure safe and efficient structural connections.
EN 14399-10 HRC bolts are widely used in steel structures, bridges, wind towers, power transmission projects, industrial plants, and heavy construction applications throughout Europe and international markets.
How Does an HRC Bolt Work?
EN 14399-10 HRC bolts use a torque shear system. During installation, a special shear wrench grips the spline end while tightening the nut. When the specified preload is achieved, the spline automatically breaks off.
This installation method offers several advantages:
- No torque calibration on site.
- Visual confirmation of installation.
- Uniform preload in every connection.
- Increased installation efficiency.
EN 14399-10 HRC Structural Bolt 10.9 Preloaded Bolts Features
EN 14399-10 HRC Bolts are high-strength structural bolting assemblies designed for preloaded steel connections according to the European standard EN 14399-10. HRC stands for High Resistance Calibrated system, which utilizes a torque shear installation method to achieve consistent preload in structural joints.
- High-strength Grade 10.9 alloy steel
- Calibrated preload system
- Torque shear installation
- Consistent clamping force
- Fast and easy installation
- Reduced installation errors
- Suitable for preloaded structural joints
- Supplied as a complete assembly
Each assembly includes: The three components are tested and supplied together to ensure proper preload performance.
- HRC Bolt
- Structural Nut
- Hardened Washer
| Product Name | EN 14399-10 HRC Structural Bolt |
| Head Type | Large Hex Head/Cup Head/Countersunk Head |
| Grade | 10.9 |
| Regular Size | M12 M16 M20 M22 M24 M27 M30 M36 |
| Finishing | Black Oxide/Plain Oiled/Hot Dip Galvanized (HDG)/Geomet Coating |
| Acceossies | HRC Bolt & Structural Nut & Hardened Washer |
| Tensile strength | ≥ 1000 MPa |
| Bolt Type | Preloaded Structural Joint Bolt |
| Mounting method | Torque Shear |
| Application | Steel structure/Bridge/Tower/ Industrial plant |
EN14399-10 Large Hex Head HRC Bolt Specifications:
What is the EN14399-10 Large Hex Head HRC Bolts Common Sizes ?
M12 × 40–100 mm
M16 × 45–180 mm
M20 × 50–220 mm
M22 × 55–240 mm
M24 × 60–260 mm
M27 × 70–280 mm
M30 × 80–300 mm
M36 × 100–300 mm
EN14399-10 Cup Head HRC Bolt Specifications:
YOKELINK EN 14399-10 Cup Head HRC Bolts are high-strength Grade 10.9 structural bolting assemblies designed for preloaded steel connections. Featuring a smooth cup head design and torque shear installation system, these bolts provide calibrated preload, reliable clamping force, and efficient installation for bridges, railway systems, industrial structures, and heavy construction projects. Available in sizes M12 to M36 with various protective coatings, EN14399-10 Cup Head HRC bolts deliver safe and durable structural connections.
For export projects, the most commonly requested sizes are:
M20 × 70–120 mm
M22 × 70–140 mm
M24 × 80–160 mm
These sizes are widely used in steel structures, bridges, and infrastructure projects.
EN14399-10 Countersounk Head HRC Bolt Specifications:
YOKELINK EN 14399-10 Countersunk Head HRC Bolts are high-strength Grade 10.9 structural bolt assemblies designed for preloaded steel connections requiring a flush surface finish. Featuring a torque shear installation system and calibrated preload technology, these countersunk bolts provide reliable clamping force, efficient installation, and excellent structural performance for bridges, railway projects, steel structures, and industrial applications. Available in sizes M12 to M36 with multiple coating options, YOKELINK HRC bolt assemblies deliver safe and durable structural connections worldwide.
EN14399-10 HRC Structural Bolts Manufacturing Process
EN14399-10 HRC Structural Bolts Quality Control:
YOKELINK EN 14399-10 HRC Bolt Assemblies are manufactured under a comprehensive quality control system that includes raw material inspection, heat treatment monitoring, hardness testing, preload verification, torque shear testing, coating inspection, and final assembly validation. All bolts, nuts, and washers are tested to ensure compliance with EN 14399-10 requirements, delivering high-strength, reliable, and safe structural connections for steel structures, bridges, wind towers, and industrial applications.
EN14399-10 HRC Structural Bolts Application:
EN 14399-10 HRC Structural Bolts are high-strength preloaded fastening assemblies designed for steel structures
requiring reliable and consistent preload. Their tension control installation system ensures accurate clamping
force and improves structural safety.
1. Steel Building Structures
HRC structural bolts are widely used in steel frame buildings, warehouses, industrial plants, and commercial buildings. The controlled preload helps maintain the integrity of beam-to-column and column-to-column connections. Applications include: Industrial buildings/Commercial steel structures/Warehouses/Multi-story steel buildings
2. Bridge Construction
Bridges require high-strength bolted connections that can withstand dynamic loads, vibration, and fatigue. EN 14399-10 HRC bolts provide reliable preload and long-term structural performance. Typical applications: Steel highway bridges/Railway bridges/Pedestrian bridges/ Bridge rehabilitation projects
3. Power Transmission Towers
Transmission towers and substations require secure structural connections that can resist wind loads and environmental conditions.
HRC bolts are commonly used in: Transmission towers/Substation steel structures/Electrical support structures
4. Wind Power Projects
Wind turbine towers experience continuous dynamic loading and vibration. EN 14399-10 bolts
provide consistent clamping force, making them suitable for:
Wind tower steel structures/Turbine support frames/ Renewable energy projects
5. Industrial and Petrochemical Facilities
Heavy industrial facilities require high-strength structural connections capable of handling large loads and harsh environments.
Applications include: Oil and gas plants/Petrochemical facilities/Mining structures/Heavy equipment support structures
Key Advantages for These Applications
- High strength Property Class 10.9
- Controlled preload installation
- Reduced installation errors
- Excellent fatigue resistance
- Reliable structural performance
- Suitable for critical bolted connections
FAQ for EN14399-10 HRC Structual Bolts:
1. What is an EN 14399-10 HRC bolt?
EN 14399-10 HRC bolts are high-strength structural bolting assemblies designed for preloaded steel connections. They use a splined end that breaks off during installation to achieve the required preload.
2. What does HRC mean in EN 14399-10?
HRC refers to a high-strength structural bolting system with calibrated preload. The bolt is installed using a special shear wrench, which controls the preload by twisting off the spline end.
3. What strength grade is EN 14399-10?
EN 14399-10 bolts are typically manufactured in Property Class 10.9, providing high tensile strength and excellent load-bearing performance for structural applications.
4. What are the common sizes available?
Standard sizes include:
M12/M16/M20/M22/M24/M27/M30/M36
Custom lengths are also available upon request.
5. What is the difference between EN 14399-10 and EN 14399-4?
EN 14399-4 uses the HR system with torque tightening, while EN 14399-10 uses the HRC system with a splined end and tension control installation, ensuring consistent preload.
6. Can EN 14399-10 bolts be hot-dip galvanized?
Yes. EN 14399-10 bolts can be supplied with hot-dip galvanizing, zinc plating, or other corrosion-resistant coatings depending on the application environment.
7. What applications are EN 14399-10 bolts used for?
These bolts are widely used in:
Steel structures
Bridges
Industrial buildings
Power transmission towers
Wind energy projects
Heavy construction projects
8. What installation tools are required?
EN 14399-10 HRC bolts are installed using a specialized shear wrench or tension control wrench that grips the spline end and twists it off when the required preload is achieved.
9. Are nuts and washers included?
Yes. EN 14399-10 bolts are normally supplied as a complete assembly consisting of:
One HRC bolt
One heavy hex nut
Two washers
This ensures proper preload performance.
10. Can YOKELINK provide customized sizes and markings?
Yes. YOKELINK can manufacture customized lengths, coatings, head markings, and packaging according to customer requirements and project specifications.
Why Choose Yokelink for EN14399-10 HRC Structual Bolts?
YOKELINK supplies high-strength EN 14399-10 HRC structural bolt assemblies designed for critical steel connections. Our products are manufactured to meet demanding structural applications in bridges, steel buildings, power transmission projects, and industrial construction. Yokelink is an ISO9001 certified manufacturer with over 15 years of export experience in power line hardware, ensuring reliable quality, competitive factory direct pricing, and strict compliance. All components are designed to work together to achieve the required preload performance.
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