S-90089A360 0.562" ID x 0.812" OD Plastic Washers

Key Features & Benefits at a Glance

• Superior electrical insulation provided by hard fiber material, preventing current leakage and short circuits in sensitive equipment.
• Excellent corrosion resistance due to non-metallic composition, ideal for harsh or humid industrial environments without rust concerns.
• Precise dimensional fit with 0.562" ID and 0.812" OD, ensuring secure seating and even load distribution for 9/16" screws.
• Consistent thickness control (0.014-0.016") for uniform pressure application, reducing the risk of fastener loosening or component damage.
• High-temperature resilience up to 230°F, maintaining structural integrity and performance in thermally demanding applications.
• Compliance with global standards including RoHS 3 and REACH, ensuring safe use in regulated industries and international markets.
• Lightweight and durable construction, offering long service life without adding significant weight to assemblies.

Professional Applications & Engineering Value

These hard fiber flat washers are engineered to address common challenges in electrical and industrial systems, such as galvanic corrosion and electrical isolation failures. The gray hard fiber material provides inherent dielectric properties, making them ideal for electrical insulation in panel boards, motor mounts, and control cabinets. Their precise inch dimensions (0.562" ID x 0.812" OD) ensure compatibility with standard 9/16" screws, facilitating quick installation and reducing assembly errors. In mechanical applications, they serve as reliable spacers and vibration dampeners, while the non-metallic composition eliminates risk of electrolytic corrosion when used with dissimilar metals. This makes them a versatile choice for OEMs and maintenance teams in automotive, HVAC, and machinery sectors seeking corrosion-resistant washers that uphold operational safety and longevity.

Specification Summary & Compliance

This flat washer adheres to standard inch measurement tolerances, with an inner diameter of 0.562", outer diameter of 0.812", and thickness ranging from 0.014" to 0.016" for consistent performance. It is manufactured from hard fiber and designed specifically for 9/16" screw size applications. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances. It is rated for continuous use at temperatures up to 230°F, supporting reliable operation in varied industrial conditions.