S-95601A320 0.312" ID x 0.438" OD Plastic Washers

Key Features & Benefits at a Glance

• Superior electrical insulation provided by hard fiber material, preventing current leakage in electrical assemblies
• Excellent vibration dampening properties that reduce noise and prevent fastener loosening in machinery
• Chemical and corrosion resistance making it ideal for harsh industrial environments where metal washers would degrade
• Precise dimensional fit with 0.312" ID specifically engineered for 5/16" screws, ensuring secure fastening
• Temperature resilience up to 230°F, maintaining structural integrity in moderate heat applications
• Regulatory compliance assurance with RoHS 3 and REACH standards for safe use across global markets
• Non-marring surface protection that prevents damage to delicate surfaces while distributing load evenly

Professional Applications & Engineering Value

This red hard fiber flat washer delivers critical engineering solutions where electrical insulation and vibration resistance are paramount. The hard fiber material composition provides excellent dielectric properties, making it ideal for electrical enclosures, control panels, and electronic assemblies where current isolation is essential. Its non-conductive nature prevents galvanic corrosion when used between dissimilar metals, extending equipment lifespan. The precise 0.312" inner diameter ensures perfect alignment with 5/16" screws, while the 0.438" outer diameter provides optimal load distribution across connected surfaces. These flat washers are particularly valuable in industrial maintenance, automotive applications, and machinery where non-metallic washers prevent electrolytic action and reduce maintenance frequency.

Specification Summary & Compliance

This hard fiber flat washer features precise inch-dimension specifications with 0.312" inner diameter, 0.438" outer diameter, and 0.028-0.034" thickness tolerance. Manufactured to standard flat washer dimensions for 5/16" screw size applications. The product maintains full compliance with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations regarding chemical safety. Temperature rating certified to 230°F maximum operating conditions, ensuring reliable performance across specified industrial environments.