S-90132A130 0.188" ID x 0.438" 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 electrical insulation from hard fiber material, preventing current leakage and short circuits in sensitive applications
- Excellent corrosion resistance with no metallic content, ideal for humid or chemically aggressive industrial environments
- Precise dimensional fit with 0.188" ID and 0.438" OD ensuring secure placement under No. 8 screw heads
- High durability with Rockwell R80 hardness rating, maintaining structural integrity under repeated assembly cycles
- Thermal stability up to 230°F (110°C), suitable for applications with moderate heat exposure
- Regulatory compliance with RoHS 3 and REACH standards, meeting global environmental and safety requirements
- Optimal load distribution with consistent 0.036-0.044" thickness, preventing surface damage and loosening
Professional Applications & Engineering Value
These hard fiber flat washers deliver critical engineering solutions where electrical isolation and chemical resistance are paramount. The non-conductive fiber composition eliminates galvanic corrosion risks in multi-metal assemblies while providing reliable insulation in electrical enclosures, control panels, and automotive systems. With precise inch dimensions (0.188" ID x 0.438" OD) for No. 8 screws, they maintain consistent clamping force without embedding into soft materials. The Rockwell R80 hardness ensures dimensional stability under vibration, making them ideal for machinery, HVAC systems, and industrial equipment requiring long-term reliability in challenging operating conditions.
Specification Summary & Compliance
Manufactured to standard inch system specifications with 0.188" inner diameter, 0.438" outer diameter, and 0.036-0.044" thickness range. Complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, containing no restricted substances. Temperature rating certified to 230°F maximum operating conditions. Designed specifically for No. 8 screw sizes in general industrial and electrical applications.
