EN14399-10 HRC Large Hex Head Bolt Cup Head Bolts Manufacturering Process

EN14399-10 HRC Large Hex Head Bolt Cup Head Bolts Manufacturering Process

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Ningbo Yokelink Machinery Co.,Limited

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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:

Yokelink EN14399-10 Large Hex Head HRC Bolts are available in standard metric sizes ranging from M12 to M36, with the most commonly used diameters including M16, M20, M22, M24, M27, and M30. Standard bolt lengths typically range from 40 mm to 300 mm depending on the required grip length and structural connection design. These high-strength Grade 10.9 bolt assemblies feature large hex heads, splined ends for torque shear installation, and are supplied complete with matching nuts and hardened washers. EN14399-10 Large Hex Head HRC bolts are widely used in steel structures, bridges, wind towers, and heavy industrial construction projects throughout Europe and international markets.

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 Large Hex Head HRC Bolt Specifications

EN14399-10 Large Hex Head HRC Bolt Specification

EN14399-10 Cup Head HRC Bolt Specifications:

EN14399-10 HRC Bolt Tension Control Structural Bolt (1)

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 Cup Head HRC Bolt Specification (1)

EN14399-10 Cup Head HRC Bolt Specification (2)

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 Countersunk Head HRC Bolt Specification (2)

EN14399-10 Countersunk Head HRC Bolt Specification (1)

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.

EN 14399-10 HRC Structural Bolts Application (1)

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

EN14399-10 HEC Structrual Bolts Application

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.

EN 14399-10 HRC Structural Bolt Grade 10.9

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