Overview
The DIN 25201 Double Lock Washer is engineered to deliver a permanent, vibration-proof locking action in critical bolted assemblies. This washer features a unique double-lobed design that creates significant spring tension and bite into both the bearing surface and the fastener, preventing loosening under dynamic loads and severe vibration. Manufactured from high-grade 65Mn carbon steel and finished with a protective Dacromet coating, it is built for long-term reliability in harsh industrial environments.
Key Features
Double-lobed design provides superior locking force and vibration resistance. Constructed from 65Mn carbon steel for high tensile strength and durability. Dacromet finish offers excellent corrosion protection, outperforming standard zinc plating. Conforms to DIN 25201 standards, ensuring dimensional consistency and reliable performance. Designed for permanent installation, maintaining clamp load over the lifespan of the assembly.
Specifications
System of Measurement: Metric (Imperial dimensions provided) Material Grade/Class: 65Mn
Material
Carbon Steel Thread Size: Not Applicable Finish: Dacromet Shaft/Bore Diameter: 0.248 inches Outer Diameter: 0.531 inches Thickness: 0.094 inches Package Quantity: 1000 washers
Applications
Ideal for use in automotive and transportation manufacturing for engine components, chassis, and drivetrains. Essential in heavy machinery and agricultural equipment subject to constant vibration. Suitable for structural steelwork, conveyor systems, and high-stress industrial assemblies. Recommended for any application where standard flat washers or split lock washers are insufficient to prevent fastener loosening.
