S-90089A405 0.812" ID x 1.125" OD Plastic Washers

Key Features & Benefits at a Glance

• Superior electrical insulation provided by hard fiber material, preventing current leakage and short circuits in electrical assemblies
• Precise dimensional fit with 0.812" ID and 1.125" OD ensures perfect alignment and uniform load distribution for 3/4" screws
• Excellent thermal resistance maintains structural integrity at temperatures up to 230°F, ideal for high-temperature industrial environments
• Chemical and corrosion resistance of hard fiber material protects against degradation in harsh operating conditions
• Reduced vibration and noise through fiber's natural damping properties, extending equipment service life
• Regulatory compliance assurance with RoHS 3 and REACH standards for global market acceptance and environmental safety
• Consistent performance guaranteed by tight thickness tolerance (0.014-0.016") for reliable sealing and spacing applications

Professional Applications & Engineering Value

These hard fiber flat washers deliver exceptional engineering value in demanding industrial settings where electrical insulation and thermal stability are critical. The gray hard fiber construction provides excellent dielectric properties, making them ideal for electrical panels, motor assemblies, and control systems where preventing electrical conductivity is paramount. Their ability to withstand temperatures up to 230°F ensures reliable performance in heated equipment and machinery. The precise 0.812" ID x 1.125" OD dimensions and consistent thickness create perfect sealing surfaces for 3/4" screws, preventing fluid leakage and maintaining bolt tension in piping systems, compressors, and industrial machinery. The material's natural resilience absorbs vibration and compensates for thermal expansion, reducing maintenance frequency and equipment downtime in continuous operation environments.

Specification Summary & Compliance

This hard fiber flat washer features precise inch system dimensions with 0.812" inner diameter, 1.125" outer diameter, and controlled thickness between 0.014-0.016" for consistent performance. Manufactured to industrial standards for 3/4" screw applications, the washer maintains dimensional stability across its operating range. The product is fully compliant with RoHS 3 (2015/863/EU) regulations, ensuring restriction of hazardous substances, and meets REACH (EC 1907/2006) requirements for chemical safety, including the latest SVHC updates as of June 14, 2023. These certifications guarantee the washer's suitability for international markets and environmentally conscious manufacturing operations.