EN 14399-4 is a European standard for high-strength structural bolts with large widths across flats. These bolts are essential for steel construction, bridge engineering, and heavy industrial structures, offering high tensile strength and long-term reliability. The standard regulates material quality, mechanical properties, and production guidelines to ensure safe and durable fastenings in load-bearing steel structures.
Table of Contents
Introduction to EN 14399-4 Bolts
EN 14399-4 defines the specifications for high-strength hexagon bolts with large widths across flats, ensuring durability, load-bearing capacity, and compliance with safety standards. These bolts are manufactured using certified production procedures and strict product testing to meet the demands of structural engineering applications.
Key Features of EN 14399-4 Hexagon Bolts
Large Width Across Flats
Designed with an increased hexagonal surface for improved grip and torque application.
High-Tensile Strength
Manufactured from high-strength steel, typically available in grades 8.8, 10.9, and 12.9, ensuring superior resistance to shear and tensile forces.
Vibration and Fatigue Resistance
Provides enhanced durability in high-load environments, making it ideal for long-term structural applications.
Material and Surface Coating Options
- Carbon Steel for high-load structural applications
- Hot-Dip Galvanized Coating for corrosion resistance in outdoor and marine environments
- Zinc-Plated & Phosphated Finishes for enhanced durability and wear protection
Material and Strength Classification
EN 14399-4 bolts are classified based on:
- Strength Grades: 8.8, 10.9, 12.9
- Thread Type: Metric (Coarse & Fine)
- Surface Treatment Options: Hot-dip galvanized, zinc-plated, phosphated
- Compliance with European mechanical and material strength regulations
Applications of EN 14399-4 Bolts
- Steel Construction & Infrastructure – Used in bridges, buildings, and load-bearing frameworks
- Heavy Machinery & Industrial Equipment – Ensures secure fastening in critical applications
- Power Plants & Renewable Energy – Required for load-bearing connections in turbines and industrial structures
- Railway & Marine Engineering – Provides high-strength fastening for extreme conditions
Advantages of Using EN 14399-4 Structural Bolts
High Load Capacity
Designed for structural applications requiring extreme strength and stability.
Corrosion Resistance
Available in various coatings, including hot-dip galvanization for long-term durability.
Certified Manufacturing Process
Meets strict European regulations for reliability and safety in critical structures.
Compliance & Standard Specifications
| Property | Specification |
|---|---|
| Head Type | Hexagon (Large Widths Across Flats) |
| Thread Type | Metric (Coarse & Fine) |
| Strength Classes | 8.8, 10.9, 12.9 |
| Surface Treatment | Hot-dip galvanized, Zinc-plated, Phosphated |
Why Choose Our EN 14399-4 Bolts?
- Manufactured in full compliance with EN 14399-4 regulations
- Tested for high-strength, durability, and corrosion resistance
- Available in various sizes, grades, and coatings for diverse applications
- Bulk supply with fast delivery for large-scale construction projects
Final Thoughts
EN 14399-4 hexagon bolts are critical components in structural engineering, ensuring high-strength fastening in demanding applications. Designed for durability, vibration resistance, and compliance with European standards, these bolts are the preferred choice for large-scale steel constructions and heavy-duty frameworks.
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