DIN EN 14399-3 Bolts

1. What is DIN EN 14399-4?

DIN EN 14399-4, also known as EN 14399-4, is a European standard for high-strength structural bolts in the HV system. These bolts are designed for applications requiring high load capacity and durability. At Quang Thai, we manufacture DIN EN 14399-4 bolts with diameters ranging from M12 to M56, ensuring compliance with the international ISO standard for strength class 10.9.

 

2. Features of DIN EN 14399-4 Bolts

What is DIN EN 14399-3?

DIN EN 14399-3, also known as BS EN 14399-3, is a European standard for heavy-duty structural bolts in the HR system. These bolts are specifically designed for high-load connections requiring exceptional strength and durability.

Quang Thai manufactures EN 14399-3 bolts with diameters ranging from M12 to M56, meeting strength grades of 8.8 and 10.9 according to international standards.

Features of DIN EN 14399-3 Bolts

Standard Dimensions

EN 14399-3 bolts are produced according to the EN 14399 (-3 Bolt) - 2015 Part 3 standard, which specifies high-strength hexagonal structural bolts in the HR system.

Surface Treatments

At Quang Thai, DIN EN 14399-3 bolts can be treated with various surface finishes, including:
• Hot-dip galvanization
• Electro-galvanization (white-blue, gray, yellow 7-color coating)
• Dacromet or Geomet coating
• Black oxide coating

However, for 10.9-grade high-strength bolts, hot-dip or electro-galvanization is not recommended due to hydrogen embrittlement, which can compromise the bolt’s ductility and lead to cracking or failure.

 

 

System	HR System	HV System
Bolts and Nuts	EN 14399-3	EN 14399-4
Washers	EN 14399-5 or EN 14399-6	EN 14399-6
Component	Bolt	HR 8.8
Nut	HR8 or HR10
Washer	H or HR
General Requirements	EN 14399-1
Material	Carbon steel, alloy steel
Chemical Composition	ISO 898-1 Standard
Mechanical Properties	ISO 898-1 Standard

3. Applications of DIN EN 14399-3 Bolts

Thanks to their high strength and load-bearing capacity, EN 14399-3 bolts are widely used in various structural and industrial projects, including:

• Steel structures: Industrial zones, factories
• Energy sector: Wind turbines, hydroelectric plants
• Oil & gas, ports, and marine structures
• Civil construction: Bridges, highways, high-rise buildings
• Heavy machinery installation and assembly

4. Pricing of DIN EN 14399-3 Bolts

The price of EN 14399-3 bolts depends on several factors:

• Type: The standard covers different types of fasteners, such as structural bolts and nuts, each with its own pricing.
• Material: Different raw materials influence the cost.
• Strength grade: Higher strength grades come at a higher price (e.g., 10.9-grade bolts cost more than 8.8-grade bolts).
• Size: Larger diameters and longer bolts generally cost more (e.g., M42 bolts cost more than M39, and M20x120 costs more than M20x100).
• Surface treatment: Coatings affect pricing for example, hot-dip galvanization is more expensive than electro-galvanization.

 

At Quang Thai, we take pride in being a leading manufacturer of DIN EN 14399-3 standard bolts in Vietnam. Our factory produces high-quality structural bolts and fasteners at competitive prices while prioritizing product reliability and performance.

For the best-quality bolts, contact us at +84 933 220 468. Quang Thai is always ready to serve you!