S-97725A212 18.2 mm ID x 21.9 mm OD DIN 7603 Metal Sealing Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from pure copper construction, ideal for harsh industrial environments
• Excellent electrical conductivity ensures reliable performance in electrical and grounding applications
• Precise dimensional accuracy with 18.2mm ID and 21.9mm OD for perfect M18 screw fitment
• DIN 7603 compliance guarantees consistent quality and interchangeability in metric fastener systems
• Reliable sealing performance with 1.3-1.7mm thickness range for optimal compression and load distribution
• RoHS 3 environmental compliance meets strict EU regulations for hazardous substance restrictions
• Durable copper material maintains integrity under repeated thermal cycling and mechanical stress

Professional Applications & Engineering Value

This M18 copper flat washer delivers critical engineering solutions where standard steel washers fail. The copper material provides inherent corrosion resistance in chemical processing, marine, and outdoor applications, eliminating galvanic corrosion concerns when paired with compatible metals. Its excellent electrical conductivity makes it indispensable for electrical panels, grounding systems, and power distribution equipment where reliable current flow is essential. The DIN 7603 standard ensures precise dimensional control for consistent performance in metric fastener assemblies, while the copper's malleability creates effective seals in plumbing, hydraulic, and pneumatic systems. These copper flat washers withstand temperature variations without compromising their sealing capability, making them ideal for automotive, industrial machinery, and electrical enclosure applications.

Specification Summary & Compliance

This metric flat washer features precise dimensions with 18.2mm inner diameter, 21.9mm outer diameter, and 1.3-1.7mm thickness range. Manufactured to DIN 7603 specifications for dimensional accuracy and performance consistency in metric fastener systems. The washer is RoHS 3 (2015/863/EU) compliant, meeting European Union restrictions on hazardous substances. Copper material provides natural corrosion resistance without additional surface treatments, maintaining electrical conductivity and sealing performance across various industrial applications.