DIN 127 Spring Washer – Reliable Locking Solution for Vibrating Assemblies
The DIN 127 Spring Washer, also known as a split lock washer, is a widely used fastening component designed to prevent loosening caused by vibration, dynamic loads, or thermal expansion. By applying continuous spring force to the bolted joint, this washer improves connection stability and extends the service life of assembled parts.
Unlike flat washers that mainly distribute load, the DIN 127 spring washer works as an active locking element, maintaining preload on the fastener even when external forces are applied. This makes it a practical choice for mechanical, structural, and industrial assemblies where reliability is critical.
|
|
Inner Diameter (d1, mm) |
Outer Diameter (d2, mm) |
Thickness (s, mm) |
|
M2 |
2.1 |
4.1 |
0.5 |
|
M4 |
4.3 |
7.6 |
1.0 |
|
M6 |
6.4 |
11.8 |
1.6 |
|
M8 |
8.4 |
14.8 |
2.0 |
|
M10 |
10.5 |
18.1 |
2.5 |
|
M12 |
12.5 |
21.1 |
3.0 |
|
M16 |
16.5 |
28.2 |
3.5 |
|
M20 |
20.5 |
34.5 |
4.0 |
How DIN 127 Spring Washers Work
The washer features a split and helically formed profile. When compressed during tightening, it generates elastic tension that increases friction between the nut or bolt head and the mating surface. This spring action helps counteract self-loosening caused by:
Repeated vibration
Impact loads
Temperature changes
Minor material deformation over time
As a result, fasteners remain secure without the need for complex locking systems.
Advantages of DIN 127 Spring Washers
Improves fastening security under dynamic conditions
Simple structure, easy installation
Cost-effective locking solution
Compatible with standard bolts and nuts
Widely standardized and globally accepted
Common Applications
DIN 127 spring washers are commonly used in:
Steel structures and metal fabrication
Machinery and equipment assembly
Automotive and transport components
Electrical enclosures and mounting systems
General construction and industrial maintenance
They are especially effective in applications where periodic vibration or movement is unavoidable.
Materials and Surface Treatments
To suit different working environments, DIN 127 spring washers are available in multiple materials and finishes, including:
Carbon steel for general-purpose use
Stainless steel (A2 / A4) for corrosion resistance
Surface treatments such as black oxide, zinc plated, or hot dip galvanized for extended durability
Material and coating selection should be based on load requirements and environmental exposure.
Why Choose DIN 127 Standard
The DIN 127 standard ensures dimensional consistency and reliable performance across applications. Using standardized spring washers simplifies sourcing, improves assembly compatibility, and reduces maintenance risks in long-term projects.
For engineers, contractors, and distributors, DIN 127 spring washers remain a dependable and practical choice for enhancing joint stability in demanding environments.
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