Carbon Steel Double Serrated Lock Washers DIN 9250
Double Serrated Lock Washers: A Superior Anti-Loosening Fastener Solution
Double serrated lock washers are a vital component in ensuring mechanical assemblies don’t loosen over time. Known for their superior locking capabilities, these washers are designed with serrations on both sides, effectively preventing slippage between surfaces even under heavy vibrations. At Flybear Fastener, we specialize in providing high-performance fasteners like these, manufactured to industry-standard specifications such as DIN 9250 and crafted from high-quality carbon steel.
Product Overview
Double serrated lock washers, as governed by DIN 9250, are mechanical fasteners widely used to prevent nuts and bolts from coming loose. These washers feature serrations on both the top and bottom that grip the surfaces they contact, ensuring a firm hold even in dynamic or high-vibration environments. The symmetric serrated shape makes them ideal for bolted connections where extra resistance to loosening is critical.
Product Specification Table
| Product Name | Double Serrated Lock Washer |
|---|---|
| Standard | DIN 9250 |
| Material | Carbon Steel |
| Surface Coating Options | Zinc Plated, Black Oxide |
| Size Range | M5 to M30 |
| Shape | Round with serrated faces |
| Hardness | Up to 350 HV |
Technical Parameters Table
| Parameter | Value |
|---|---|
| Torque Resistance | 60% higher than smooth washers |
| Thickness Tolerance | ±0.1 mm |
| Surface Roughness | Ra ≤ 1.6 |
| Angular Displacement | ≤ 5° under load |
| Operating Temperature | -40°C to +200°C |
Material Introduction & Production Process
Our double serrated lock washers are manufactured using premium carbon steel selected for its strength and durability in industrial applications. The production process follows these steps:
- Material Sourcing – High-grade carbon steel per mechanical properties required by DIN 9250.
- Stamping – Precision stamping creates the base shape with accurate dimensional tolerance.
- Serration Forming – Teeth are added both on the top and bottom using CNC tooling.
- Heat Treatment – To improve hardness, fatigue resistance, and wear resistance.
- Surface Finishing – Options like zinc plating or black oxide applied based on customer needs.
- Inspection & Packaging – 100% quality control with lot traceability ensures reliability.
Typical Applications and Industries
Double serrated lock washers are commonly used across multiple industries that demand high resistance to vibration and mechanical movement:
- Automotive assembly lines
- Railway and heavy equipment
- Wind turbines & solar panel structures
- Electrical enclosures and switchgear
- Industrial machinery and conveyors
Competitive Advantages of Double Serrated Lock Washers
- Premium Material Selection: We use top-grade carbon steel to ensure durability under harsh conditions.
- Precision Manufacturing: All washers are produced with tight tolerances and consistent serration geometry.
- Superior Anti-Vibration Performance: Dual serrations improve friction and prevent loosening more efficiently than flat washers.
- Custom OEM Options: We can manufacture according to your drawing or specific project requirements.
- Efficient Inventory Management: Warehousing and logistics systems are optimized for fast delivery.
- Robust Technical Support: Our engineers offer expert guidance and quick response times.
Quality Control & Inspection Process
At Flybear Fastener, we have established a rigorous quality management process to ensure our fasteners meet and exceed industry standards:
- Incoming material inspection with certified mill test reports.
- In-process dimensional and hardness testing.
- Final product verification using torque and vibration simulation.
- Compliance with RoHS and REACH environmental standards.
Each batch of double serrated lock washers goes through detailed inspection reports, and we retain samples for traceability.
Selection and Procurement Guide
When choosing the right double serrated lock washer for your application, consider the following:
- Bolt/Bore Size: Ensure washer size matches your fastener dimensions.
- Surface Coating: Choose zinc plating for corrosion resistance or black oxide for aesthetic and surface protection.
- Load Requirements: Make sure the washer hardness supports your application force.
- Environmental Conditions: For high-exposure environments, zinc or phosphate-coated washers are recommended.
To simplify your selection, our team offers support along with data sheets and 3D models upon request.
Conclusion & Corporate Integration
Choosing a reliable double serrated lock washer can dramatically improve the longevity and safety of mechanical assemblies. At Flybear Fastener, we provide a full range of high-quality fastener products tailored to meet the needs of various industries. Whether your project demands anti-vibration performance or a specific compliance standard, we’re here to help with custom solutions.
We strongly recommend you contact us for technical consultations, quotations, and access to our extensive product catalogs. We always uphold the principle of “Quality First, Customer Supreme,” and are committed to being your trusted provider of fastening systems and one-stop fastening solutions.
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