S-97725A134 27.3 mm ID x 31.9 mm OD DIN 7603 Metal Sealing Washers

Key Features & Benefits at a Glance

• Superior electrical and thermal conductivity from high-purity copper material, ensuring reliable performance in electrical and heat-transfer applications.
• Excellent corrosion resistance for extended service life in harsh or humid industrial environments, reducing maintenance and replacement costs.
• Precise dimensional accuracy with 27.3mm ID and 31.9mm OD, providing a secure fit for M27 screws and preventing loosening under vibration.
• DIN 7603 compliance guarantees consistent quality and interchangeability in metric fastener systems, streamlining procurement and assembly.
• RoHS 3 and REACH environmental compliance ensures safe use in regulated industries, supporting your sustainability and regulatory goals.
• Optimized thickness range (1.8-2.2mm) offers flexibility for load distribution and sealing, enhancing joint integrity in various applications.
• Durable, non-galling properties of copper minimize wear during installation and disassembly, preserving fastener and surface conditions.

Professional Applications & Engineering Value

This M27 copper flat washer is engineered to address critical challenges in electrical, plumbing, and industrial assemblies where conductivity and corrosion resistance are paramount. The copper material ensures minimal energy loss in electrical connections and resists oxidation in moist or chemical-exposed settings, preventing joint failure. Compliant with DIN 7603, it provides reliable dimensional stability for M27 screw applications, distributing load evenly to reduce stress concentrations and surface damage. Ideal for use in electrical panels, automotive systems, and HVAC units, this washer enhances safety and longevity by maintaining tight seals and preventing galvanic corrosion when paired with dissimilar metals. Its metric design simplifies integration into global projects, supporting efficient maintenance and repair workflows.

Specification Summary & Compliance

This flat washer adheres to DIN 7603 standards, with precise dimensions: 27.3mm inner diameter, 31.9mm outer diameter, and 1.8-2.2mm thickness range for M27 screw compatibility. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental safety and regulatory alignment. The copper construction supports high conductivity and durability, though hardness is not rated, making it suitable for general-purpose and specialized industrial use where corrosion resistance and electrical performance are critical.