High-Performance Lock Nuts Designed for Secure Industrial Connections
In modern industrial assembly, preventing loosening caused by vibration, dynamic load and long-term operation is a critical engineering concern. Lock nuts are specially designed fasteners that provide reliable anti-loosening performance compared to standard hex nuts.
As a professional fastener manufacturer and supplier, IIIBEAR provides a wide range of locking nuts manufactured according to international standards, including DIN 985, DIN 982, NF E 25-411, DIN 980 and DIN 6923.
What Is a Lock Nut?
A lock nut is a type of nut designed to resist loosening under vibration, shock or alternating loads. Unlike conventional nuts, lock nuts create additional friction or mechanical interference with the mating bolt thread, ensuring long-term joint stability.
Lock nuts are widely used in:
- Mechanical equipment
- Steel structures
- Automotive and transportation
- Industrial machinery
- Energy and infrastructure projects
DIN 985 Nylon Insert Lock Nut
DIN 985 is a low-profile nylon insert lock nut. A polyamide (nylon) ring is embedded at the top of the nut, creating friction between the nut and the bolt thread during installation.
Key Features
- Reliable anti-loosening performance
- Low installation torque variation
- Reusable under normal conditions
- Cost-effective for mass production
Typical Applications
- General machinery
- Sheet metal assemblies
- Automation equipment
- Light industrial structures
DIN 982 Nylon Insert Lock Nut (High Type)
DIN 982 is a high-type nylon lock nut with increased height compared to DIN 985, providing higher load-bearing capacity and improved thread engagement.
Advantages
- Higher strength and load capacity
- Improved locking reliability
- Better performance under moderate vibration
Applications
- Industrial machinery
- Structural assemblies
- Equipment requiring higher clamp force
NF E 25-411 All-Metal Lock Nut
NF E 25-411 is a French standard all-metal lock nut featuring a double slotted or deformed section that generates elastic locking force. Unlike nylon lock nuts, it contains no non-metallic components.
Key Benefits
- Excellent resistance to vibration and shock
- Suitable for high-temperature environments
- No risk of nylon aging or melting
- Stable locking performance after repeated assembly
Typical Applications
- Heavy machinery
- Railway and transportation systems
- Steel structures
- High-temperature industrial equipment
DIN 980 All-Metal Self-Locking Nut
DIN 980 is an all-metal self-locking nut that achieves locking through controlled deformation of the nut thread. It is designed for applications where reliability and thermal resistance are critical.
Features
- All-metal construction
- High resistance to vibration
- Suitable for elevated temperatures
- Consistent locking torque
Applications
- Engineering machinery
- Power generation equipment
- Automotive and industrial assemblies
DIN 6923 Flange Lock Nut
DIN 6923 is a hexagon flange nut. The integrated flange increases the bearing surface and helps distribute load evenly. Some versions feature serrations that provide additional anti-loosening capability.
Advantages
- Integrated washer function
- Improved load distribution
- Reduced risk of surface damage
- Efficient assembly without additional washers
Common Uses
- Automotive assemblies
- Steel structures
- Machinery and equipment installation
How to Choose the Right Lock Nut
When selecting a lock nut, engineers should consider:
- Operating temperature
- Vibration and dynamic load conditions
- Space and assembly constraints
- Required reusability
For high-temperature or heavy-vibration applications, all-metal lock nuts such as NF E 25-411 or DIN 980 are recommended. For general industrial use, DIN 985 or DIN 982 nylon lock nuts provide an excellent balance of performance and cost.
Why Choose IIIBEAR Lock Nuts?
IIIBEAR specializes in manufacturing and supplying high-quality fastening solutions for global industrial customers. Our lock nuts are produced under strict quality control systems and can be supplied in carbon steel, alloy steel and stainless steel with various surface finishes.
With reliable performance, consistent quality and professional technical support, IIIBEAR lock nuts help ensure the safety and durability of your assemblies.
