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May. 11, 2024
In modern automotive manufacturing, fastening reliability directly affects vehicle safety, structural strength, and long-term durability.
During vehicle body assembly and sheet metal manufacturing, traditional bolt and nut connections are sometimes difficult to apply because access to the rear side of the component may be limited.
This is where DIN EN ISO 21670 welded hex flange nuts provide an efficient and reliable fastening solution.
A welded hex flange nut is a specially designed fastener that combines a hexagonal nut body with an integrated flange base. The nut is permanently welded onto a metal component, creating a strong threaded connection point for bolts and screws.
JUXIN FASTENERS specializes in manufacturing automotive welded nuts, DIN EN ISO 21670 welded hex flange nuts, custom weld nuts, and OEM fastening solutions for global automotive manufacturers and industrial customers.
A DIN EN ISO 21670 welded hex flange nut is a weldable fastening component designed for permanent installation on metal structures.
It consists of:
Hexagonal nut body
Integrated flange base
Internal precision thread
Welding area for permanent attachment
The flange design provides:
✔ Larger contact surface
✔ Improved load distribution
✔ Higher welding stability
✔ Better resistance against deformation
After welding, the nut becomes a permanent threaded attachment point, allowing easy assembly and disassembly during vehicle production and maintenance.
Automotive structures require thousands of fastening points for:
Body panels
Chassis components
Battery systems
Interior assemblies
Electrical components
Traditional nuts require access from both sides of the assembly.
However, in automotive sheet metal structures, many areas are:
Closed sections
Narrow spaces
Difficult to reach
Automotive welded nuts solve this problem by creating a permanent threaded connection directly on the body structure.
Unlike conventional mechanical fastening methods, welded hex flange nuts are permanently fixed to the base material.
Advantages:
Strong welding joint
High load capacity
Reduced risk of loosening
Improved structural reliability
This makes them suitable for safety-critical automotive applications.
The integrated flange increases the contact area between the nut and the welded surface.
Benefits:
Reduced stress concentration
Improved resistance to deformation
Better connection stability
Especially suitable for thin sheet metal applications where load distribution is critical.
The internal thread is manufactured according to international dimensional requirements to ensure:
Smooth bolt engagement
Accurate assembly
Reliable torque performance
Common thread options:
Metric threads
UNC threads
UNF threads
Customized threads according to drawings
DIN EN ISO 21670 welded hex flange nuts are manufactured from weldable steel materials.
Typical materials:
Low carbon steel
Weldable alloy steel
Automotive grade steel
The optimized welding area helps achieve:
Stable welding
Reduced welding defects
Consistent production quality
Depending on application requirements, automotive welded nuts include:
Applications:
Vehicle body structures
Chassis systems
Mechanical assemblies
Advantages:
Strong positioning
Easy welding alignment
High torque resistance
Used for:
Limited installation spaces
Special automotive structures
OEM customers often require customized designs according to:
Vehicle structure
Sheet metal thickness
Welding method
Assembly requirements
The production of automotive weld nuts requires strict process control.
Typical manufacturing steps include:
Materials are selected according to:
Welding requirements
Mechanical strength
Automotive specifications
The nut body is manufactured through:
Cold heading
Hot forging
Machining processes
Precision internal threads are produced to ensure:
Proper bolt engagement
Dimensional accuracy
Assembly reliability
The flange area is designed to provide:
Better welding contact
Improved positioning
Higher connection strength
Common finishes include:
Zinc plating
Zinc nickel plating
Black zinc coating
Phosphate coating
Geomet coating
Surface treatments improve:
Corrosion resistance
Durability
Automotive environmental performance
One of the most important applications of welded hex flange nuts is vehicle body manufacturing.
Used for:
Body panels
Floor structures
Door assemblies
Seat mounting systems
Chassis components
Welded nuts improve:
Structural strength
Assembly efficiency
Production automation
With the rapid development of electric vehicles, reliable fastening solutions are increasingly important.
Welded flange nuts are used in:
EV battery packs
Battery mounting structures
Electrical modules
Protection covers
Requirements include:
High strength
Corrosion resistance
Long service life
Applications include:
Engine control modules
Wiring brackets
Electrical housings
Sensor mounting systems
Beyond automotive applications, welded flange nuts are widely used in:
Agricultural machinery
Construction equipment
Automation equipment
Industrial structures
Proper installation ensures maximum fastening performance.
Confirm:
Thread size
Nut specification
Material compatibility
Welding requirements
Check:
Thread condition
Surface quality
No deformation or damage
Ensure:
Proper alignment
Correct welding location
Full contact with base material
Incorrect positioning may cause:
Poor welding strength
Thread misalignment
Assembly problems
Professional welding equipment should be used to ensure:
Stable welding current
Strong welding joints
Consistent production quality
JUXIN FASTENERS performs inspection according to customer requirements.
Typical inspection methods include:
Checks:
Welding joint strength
Nut holding capability
Ensures:
Thread accuracy
Bolt compatibility
Evaluates:
Connection reliability
Resistance against rotation
Controls:
Flange size
Thread position
Overall dimensions
Different environments require different corrosion protection solutions.
Suitable for:
General automotive applications
Indoor assemblies
Recommended for:
EV applications
High corrosion environments
Automotive safety components
Advantages:
Higher corrosion resistance
Better durability
Improved surface protection
Used for:
Chassis components
Outdoor automotive applications
JUXIN FASTENERS is a professional OEM fasteners manufacturer providing customized fastening solutions for automotive and industrial customers.
Our capabilities include:
✔ DIN EN ISO standard weld nuts
✔ Automotive welded fastening solutions
✔ Custom welded flange nuts
✔ Sheet metal fastening components
✔ Surface treatment solutions
✔ OEM production support
We work with engineers and purchasing teams to provide:
Material selection support
Design optimization
Production solutions
Quality control
Export packaging
Looking for a reliable DIN EN ISO 21670 welded hex flange nuts manufacturer?
JUXIN FASTENERS provides high-quality automotive weld nuts and OEM fastening solutions for global industries.
Email: info@juxinfasteners.com
Website: www.juxinfasteners.com
JUXIN FASTENERS – Precision Fastening Solutions Since 2003
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