S-90940A112 3.7 mm ID x 8 mm OD Plastic Washers

Key Features & Benefits at a Glance

• Superior chemical resistance ensures long-term reliability in harsh environments, protecting your assembly from corrosive substances.
• Excellent electrical insulation properties prevent short circuits and enhance safety in electrical applications.
• High transparency (clear polycarbonate) allows for visual inspection of components and is ideal for aesthetic or monitoring-critical designs.
• Rockwell R118 hardness provides durable performance and resistance to deformation under load, maintaining fastener integrity.
• Wide operating temperature range up to 212°F ensures stable performance in varied thermal conditions without compromising material properties.
• Precision metric dimensions (3.7mm ID, 8mm OD) guarantee a perfect fit for M3.5 screws, reducing installation errors and improving assembly efficiency.
• Compliance with RoHS 3 and REACH regulations assures environmental safety and meets global standards for restricted substances.

Professional Applications & Engineering Value

This M3.5 clear polycarbonate flat washer is engineered to address critical challenges in industrial and electronic assemblies. Its polycarbonate plastic construction offers inherent chemical resistance and electrical insulation, making it ideal for applications in electrical enclosures, medical devices, and automotive components where conductivity or corrosion is a concern. The transparent design allows technicians to visually verify connections and detect issues without disassembly, saving time and reducing maintenance costs. With a temperature resistance up to 212°F, it performs reliably in environments subject to heat fluctuations, ensuring long-term stability and preventing fastener failure. This washer is a cost-effective solution for metric-based systems, providing consistent load distribution and vibration resistance in precision equipment.

Specification Summary & Compliance

This flat washer adheres to metric system standards with precise dimensions: 3.7mm inner diameter, 8mm outer diameter, and a thickness range of 0.5-1.1mm. It is manufactured from polycarbonate plastic with a hardness of Rockwell R118, ensuring dimensional accuracy and durability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for various industrial applications.