S-97725A314 20.2 mm ID x 25.9 mm OD DIN 7603 Metal Sealing Washers

Key Features & Benefits at a Glance

• Superior electrical conductivity for reliable current transfer in electrical assemblies and grounding applications
• Enhanced corrosion resistance from cellulose-filled copper material, ensuring longevity in demanding environments
• Precise dimensional fit with 20.2mm ID and 25.9mm OD designed specifically for M20 screws, preventing loosening
• Effective sealing capability that compensates for surface irregularities to prevent fluid and gas leakage
• Industry-standard compliance with DIN 7603 specifications, guaranteeing interchangeability and quality
• Environmental responsibility with RoHS 3 compliance, meeting strict EU hazardous substance restrictions
• Consistent thickness tolerance (1.8-2.2mm) ensuring uniform pressure distribution and reliable performance

Professional Applications & Engineering Value

This M20 metric flat washer delivers exceptional engineering value through its specialized cellulose-filled copper construction, which combines the excellent conductivity of copper with improved mechanical properties. The material composition addresses critical industrial challenges by providing both reliable electrical connectivity and effective sealing performance in applications where these functions must coexist. Engineers specify these DIN 7603 compliant washers for electrical panels, transformer connections, and industrial machinery where maintaining electrical continuity while preventing fluid ingress is paramount. The metric dimensions ensure perfect compatibility with M20 fasteners in European equipment, while the material's inherent corrosion resistance extends service life in humid or chemically aggressive environments, reducing maintenance frequency and downtime.

Specification Summary & Compliance

This flat washer features precise metric dimensions with 20.2mm inner diameter, 25.9mm outer diameter, and 1.8-2.2mm thickness range. Manufactured to DIN 7603 standards for dimensional accuracy and performance consistency. The product is RoHS 3 (2015/863/EU) compliant, ensuring adherence to European Union restrictions on hazardous substances. The cellulose-filled copper material provides both the mechanical properties required for effective sealing and the electrical characteristics necessary for conductive applications.