NF E25-511 Stainless Steel Serrated Conical Spring Washer
NF E25-511 stainless steel serrated conical spring washer is a high-performance locking component designed to maintain bolt preload, improve joint stability, and resist loosening caused by vibration and dynamic loads. The NF E25-511 stainless steel serrated conical spring washer combines a conical spring structure with serrated contact surfaces to provide enhanced locking performance in demanding fastening applications.
Manufactured from corrosion-resistant stainless steel, the NF E25-511 stainless steel serrated conical spring washer offers excellent elasticity, durability, and environmental resistance. It is widely used in machinery, automotive systems, electrical equipment, industrial assemblies, and precision equipment requiring reliable fastening performance.

Product Overview
The NF E25-511 stainless steel serrated conical spring washer is engineered to improve the reliability of bolted connections by combining spring force and serrated locking action. Its conical shape creates a spring effect that maintains tension within the joint, while the serrated surfaces increase resistance against rotation.
Compared with standard flat washers, the NF E25-511 stainless steel serrated conical spring washer provides improved vibration resistance and helps compensate for minor settling or movement within the assembly.
The stainless steel construction provides excellent resistance to moisture, oxidation, and corrosion, making it suitable for applications requiring long-term performance and clean appearance.
Product Specifications
| Item | Description |
|---|---|
| Standard | NF E25-511 |
| Product Name | Stainless Steel Serrated Conical Spring Washer |
| Material | Stainless Steel |
| Washer Type | Serrated Conical Spring Washer |
| Structure | Conical Disc Spring with Serrated Surface |
| Material Options | 304 / 316 Stainless Steel |
| Size Range | M2–M30 |
| Inner Diameter | According to NF E25-511 Standard |
| Outer Diameter | According to NF E25-511 Standard |
| Surface Finish | Natural Stainless Steel |
| Installation Type | Bolt and Nut Assembly |
| Packaging | Bulk / Carton / OEM Packaging |
| Customization | Size, material, finish available |
Technical Parameters
| Parameter | Value |
|---|---|
| Material Grade | Stainless Steel |
| Tensile Strength | According to selected stainless steel grade |
| Spring Force | Stable elastic performance |
| Hardness | Controlled for spring characteristics |
| Density | Approx. 7.9 g/cm³ |
| Corrosion Resistance | Excellent |
| Fatigue Resistance | Good |
| Locking Performance | Improved by serrated contact surfaces |
| Manufacturing Standard | NF E25-511 |
Materials and Manufacturing Process
The NF E25-511 stainless steel serrated conical spring washer is manufactured through precision stamping and forming processes to ensure consistent spring performance and accurate geometry.
- Raw material selection: High-quality stainless steel strip
- Stamping process: Precision forming of conical washer shape
- Serration forming: Creation of locking teeth on contact surfaces
- Heat treatment: Improves elasticity and fatigue resistance
- Surface cleaning: Removes processing residues
- Inspection: Dimension, spring force, and surface quality testing
- Packaging: Protective industrial packaging for transportation
Each NF E25-511 stainless steel serrated conical spring washer is produced under strict quality control to ensure reliable fastening performance.
Applications of the Product
The NF E25-511 stainless steel serrated conical spring washer is widely used in industries requiring secure fastening:
- Automotive industry: Vehicle components and vibration areas
- Machinery manufacturing: Mechanical equipment assemblies
- Electrical equipment: Control cabinets and precision systems
- Industrial automation: Equipment fastening applications
- Marine equipment: Corrosion-resistant connections
- Energy equipment: Outdoor mechanical assemblies
- Precision instruments: Stable fastening structures
- Manufacturing systems: High-reliability bolted joints
Its combination of spring action and serrated locking makes it suitable for applications where connection stability is important.
Why Choose This Product
- NF E25-511 standard compatibility
- Stainless steel corrosion resistance
- Serrated surfaces improve locking performance
- Conical spring design maintains preload
- Suitable for vibration environments
- Good fatigue resistance
- Clean stainless steel appearance
- Available in multiple stainless grades
- OEM customization support
The NF E25-511 stainless steel serrated conical spring washer provides a reliable solution for improving fastening safety and connection stability.
Why Choose Flybear
Flybear is a professional manufacturer specializing in industrial fasteners and customized fastening solutions.
- Advanced stainless steel stamping capability
- Experience with spring washer production
- OEM/ODM customization support
- Stable production capacity for industrial orders
- Strict quality inspection procedures
- Global export experience
- Engineering support for customized applications
Flybear provides reliable fastening products for machinery, automotive, electronics, and industrial customers worldwide.
Quality Inspection and Control
Quality assurance is maintained throughout the production process:
- Stainless steel chemical composition analysis
- Material certificate verification
- Washer dimension inspection
- Serration profile inspection
- Spring force testing
- Surface quality inspection
- Corrosion resistance evaluation
- Packaging inspection
All manufacturing processes follow ISO-based quality management systems to ensure consistent product reliability.
Selection Guide
When selecting an NF E25-511 stainless steel serrated conical spring washer, consider:
- Bolt diameter compatibility
- Required spring force
- Vibration level of the assembly
- Operating environment conditions
- Corrosion resistance requirements
- Connected material compatibility
Correct selection ensures long-term fastening performance and reduces the risk of joint loosening.
FAQ
1. What is NF E25-511 stainless steel serrated conical spring washer used for?
It is used to improve fastening stability and reduce loosening in bolted connections.
2. How does a serrated conical spring washer work?
The conical shape provides spring force, while serrated surfaces increase resistance against rotation.
3. What stainless steel materials are available?
Common options include 304 and 316 stainless steel.
4. Can NF E25-511 washers be customized?
Yes, Flybear supports customized dimensions, materials, and surface requirements.
5. Are these washers suitable for vibration applications?
Yes, they are designed for assemblies exposed to vibration and dynamic loading.
We always adhere to the philosophy of quality first and customer first, providing customers with high-quality fastener products and one-stop fastener solutions.
Contact us for quotation, customization, and technical support via Contact Us.




