S-90940A416 8.5 mm ID x 18 mm OD Plastic Washers
Plastic Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Temperature & Environment Parameters
Installation & Application Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior chemical resistance for reliable performance in harsh industrial environments
- Excellent transparency allows for easy visual inspection and alignment during assembly
- High-temperature tolerance up to 212°F maintains structural integrity in thermal applications
- Rockwell R120 hardness provides durable, long-lasting surface protection against wear
- Precision metric dimensions (8.5mm ID, 18mm OD) ensure perfect fit with M8 fasteners
- Lightweight polycarbonate construction reduces overall assembly weight without compromising strength
- Compliant with RoHS 3 and REACH regulations for safe use in regulated industries
Professional Applications & Engineering Value
These M8 polycarbonate flat washers deliver exceptional engineering value in applications where chemical exposure, thermal cycling, and visual access are critical concerns. The clear polycarbonate material offers outstanding resistance to industrial chemicals while maintaining dimensional stability across the operating temperature range. This makes them ideal for electrical enclosures, optical equipment assemblies, and laboratory instrumentation where traditional metal washers would corrode or interfere with visibility. The precise metric dimensions and consistent 1.4-1.8mm thickness ensure uniform load distribution and reliable spacing in M8 fastener applications, preventing component damage and maintaining assembly integrity even under vibration or thermal expansion conditions.
Specification Summary & Compliance
This metric flat washer features precise dimensional specifications with 8.5mm inner diameter, 18mm outer diameter, and 1.4-1.8mm thickness range, engineered to ISO metric standards for M8 screw applications. The manufacturing process ensures consistent Class 2A equivalent tolerance for reliable fit and function. 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 industrial components.
