S-97725A244 28 mm ID x 36.5 mm OD Metal Sealing Washers

Key Features & Benefits at a Glance

• Superior electrical and thermal conductivity due to pure copper construction, ensuring reliable performance in electrical and heat transfer applications
• Excellent corrosion resistance for extended service life in harsh industrial environments, reducing maintenance and replacement costs
• Precise metric sizing with 28mm ID and 36.5mm OD for perfect fit with M25 screws, preventing loosening and ensuring secure fastening
• Optimized load distribution with 2.8-3.2mm thickness range, minimizing surface damage and improving joint integrity
• Full regulatory compliance with RoHS 3 and REACH standards, guaranteeing safety and environmental responsibility for global supply chains
• Durable, non-sparking properties making it ideal for hazardous areas where safety is paramount
• Cost-effective solution for demanding applications where stainless steel or other materials may be over-specified

Professional Applications & Engineering Value

This copper flat washer delivers exceptional engineering value in applications requiring reliable conductivity and corrosion resistance. The M25 metric sizing ensures compatibility with standard industrial equipment, while the copper material provides natural galvanic compatibility with steel fasteners, reducing the risk of galvanic corrosion in mixed-material assemblies. In electrical panels, switchgear, and grounding systems, the washer maintains stable connections by resisting oxidation. For plumbing, HVAC, and marine applications, its corrosion resistance prevents degradation from moisture and chemicals. The precise 28mm ID and 36.5mm OD dimensions distribute clamping forces evenly, protecting sensitive surfaces and extending the life of assembled components in heavy-duty industrial settings.

Specification Summary & Compliance

This metric flat washer features precise dimensional tolerances with 28mm inner diameter, 36.5mm outer diameter, and 2.8-3.2mm thickness range, engineered for M25 screw applications. Manufactured to standard metric specifications, it ensures consistent performance across industrial fastening systems. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental and safety standards for hazardous substance restrictions.