S-90940A115 8.5 mm ID x 15.8 mm OD Plastic Washers

Key Features & Benefits at a Glance

• Exceptional transparency for easy visual inspection and alignment in precision assemblies
• High-impact resistance from polycarbonate material, reducing breakage in demanding environments
• Reliable electrical insulation properties for safe use in electrical and electronic applications
• Temperature resilience up to 212°F (100°C), maintaining performance in varied thermal conditions
• Optimized dimensional fit with 8.5mm ID for secure M8 screw seating and 15.8mm OD for even load distribution
• Durable surface hardness (Rockwell R118) resisting wear and deformation under repeated use
• Full regulatory compliance with RoHS 3 and REACH, ensuring safe integration in global industrial supply chains

Professional Applications & Engineering Value

Engineered for precision, these M8 metric flat washers solve critical challenges in industrial settings where visibility, chemical resistance, and electrical safety are paramount. The clear polycarbonate plastic construction allows technicians to verify proper installation and detect underlying issues without disassembly, streamlining maintenance. In electrical enclosures, control panels, and laboratory equipment, the washer’s inherent electrical insulation prevents short circuits, while its high-temperature tolerance ensures stability near heat-generating components. The material’s low moisture absorption and resistance to many chemicals make it ideal for humid or corrosive environments, reducing replacement frequency and lifecycle costs. These plastic flat washers are particularly valuable in food processing, medical devices, and consumer electronics, where RoHS and REACH compliance is non-negotiable for market access.

Specification Summary & Compliance

This washer conforms to standard metric flat washer dimensions with an inner diameter of 8.5mm, outer diameter of 15.8mm, and thickness ranging 1.3–1.9mm, designed for M8 screw size applications. Manufacturing adheres to general industrial tolerances for plastic components. The product is verified to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulatory requirements, confirming the absence of restricted hazardous substances and supporting use in regulated industries worldwide.