S-95647A157 8.4 mm ID x 18 mm OD Plastic Washers

Key Features & Benefits at a Glance

• Superior chemical resistance from Delrin® Acetal Plastic material, ideal for harsh industrial environments
• Excellent dimensional stability with precise metric sizing (8.4mm ID, 18mm OD) ensuring reliable fit for M8 screws
• High mechanical strength with Rockwell M90 hardness for long-lasting performance under load
• Wide temperature tolerance up to 180°F (82°C) maintaining integrity in varied operating conditions
• Regulatory compliance assurance with RoHS 3 and REACH compliance for global market access
• Reduced friction and wear thanks to acetal plastic's low coefficient of friction
• Non-conductive and corrosion-resistant properties for electrical and chemical applications

Professional Applications & Engineering Value

These M8 Delrin® Acetal Plastic Flat Washers deliver exceptional engineering value in demanding applications where metal washers would fail. The white metric washers provide excellent chemical resistance against solvents, fuels, and weak acids, making them ideal for chemical processing equipment, automotive assemblies, and food machinery. Their low moisture absorption and dimensional stability prevent swelling or deformation in humid environments, while the Rockwell M90 hardness ensures consistent load distribution and vibration resistance. The precise 8.4mm ID and 18mm OD dimensions with controlled 2.1-2.6mm thickness guarantee perfect fit and reliable sealing performance for M8 fastening systems in electrical enclosures, pump assemblies, and precision machinery where insulation and corrosion prevention are critical.

Specification Summary & Compliance

This metric flat washer features precise dimensional tolerances with 8.4mm internal diameter, 18mm outer diameter, and 2.1-2.6mm thickness range, specifically engineered for M8 screw applications. Manufactured from premium Delrin® Acetal Plastic with Rockwell M90 hardness rating, the washers comply with RoHS 3 (2015/863/EU) standards and REACH (EC 1907/2006) regulations (updated 06/14/2023, 235 SVHC). The product maintains performance integrity up to 180°F maximum operating temperature, ensuring reliability across industrial applications requiring chemical resistance and electrical insulation properties.