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The DIN25201 Double Stack Self Locking Wedge Lock Washer is an advanced fastening solution engineered to prevent bolt and nut loosening under extreme vibration and dynamic load conditions. Unlike traditional single-piece washers that rely solely on friction, this innovative washer consists of two identical washers used as a pair, utilizing a unique wedge locking principle that delivers superior anti-loosening performance.
Key Features
100% Anti-Loosening Performance - Ensures clamp load remains stable even under severe and continuous vibration, outperforming traditional friction-based locking fasteners
Tension-Based Locking Principle - Utilizes wedge effect instead of friction for locking, making the locking function unaffected by lubrication
Easy Installation and Removal - No special installation tools or procedures required; can be easily installed and removed with standard tools
Reusable - Can be disassembled and reused multiple times without compromising locking performance
Temperature Resistant - Maintains locking effectiveness across a wide temperature range; stainless steel versions operate from -160°C to 500°C
High Durability - Withstands long-term continuous vibration without loosening
Technical Specifications
Measurement System
INCH, Metric
Standard
DIN, ANSI, GB, JIS, BSW, GOST
Process
Cold Forging
Finish
Zinc Plated
Load Capacity
Medium Duty
Usage
For Fastening Metal To Metal
HS Code
7318151001
Customization Services
We offer comprehensive OEM and ODM services to meet your specific requirements:
Custom head styles, drive types (Phillips H / Pozidriv Z), and thread designs
Special lengths, diameters, and tolerances
Specific material grades and surface finishes
Custom packaging with your branding (labels, boxes, bags, blister packs)
Logo engraving on screw heads
Why Choose Us
Professional fastener manufacturer with over 10 years of export experience
Advanced automatic cold heading and thread rolling equipment ensuring consistent quality and fast delivery
Strict quality control system from raw material sourcing to finished product
Competitive factory-direct pricing with no middlemen
Responsive customer service and technical support
Flexible MOQ to accommodate both trial orders and bulk shipments
Product Images
Packaging Options
Bolts are packed in neutral packaging boxes with standard quantities arranged in small cartons. Custom packaging configurations are available upon request. Small cartons are consolidated into larger master cartons for secure transportation. Palletized units are wrapped with waterproof film and reinforced with packaging straps, with custom shipping marks available.
Ningbo Yongbiao Fastener Manufacturing Co., Ltd. is located in Ningbo, the second largest port city in China. The factory is 50 kilometers away from Ningbo Port and can reach the sea freight warehouse in one hour, with very fast logistics. The company was founded in 2012 and after years of hard work... Ningbo Yongbiao Fastener Manufacturing Co., Ltd. is located in Ningbo, the second largest port city in China. The factory is 50 kilometers away from Ningbo Port and can reach the sea freight warehouse in one hour, with very fast logistics. The company was founded in 2012 and after years of hard work...
