S-93303A104 0.312" ID x 0.75" OD Rubber Sealing Washers

Key Features & Benefits at a Glance

• Exceptional temperature resilience for reliable performance from -20°F to 460°F, ideal for extreme industrial environments
• Superior vibration dampening and sealing from the Aramid Fabric/Buna-N Rubber composite, reducing equipment wear and maintenance
• Consistent 70A Durometer hardness ensures uniform compression and long-term sealing integrity under load
• Precise 0.312" ID and 0.75" OD dimensions provide accurate fit for 5/16" screws, preventing misalignment and assembly issues
• RoHS 3 compliance guarantees environmental safety and meets global regulatory standards for industrial components
• Durable green Aramid Fabric/Buna-N construction offers excellent chemical and abrasion resistance for extended service life
• Optimized 0.054-0.070" thickness range balances flexibility and load distribution for secure fastening applications

Professional Applications & Engineering Value

This high-temperature flat washer combines Aramid Fabric for structural strength and Buna-N Rubber for elasticity, creating a robust sealing solution that addresses common industrial challenges. It effectively prevents loosening under vibration and maintains seal integrity in extreme temperature fluctuations, from sub-zero conditions to high-heat environments up to 460°F. Engineered for 5/16" screw applications in machinery, automotive, and aerospace sectors, it eliminates fluid leaks and reduces noise by absorbing dynamic loads. The composite material resists oils, chemicals, and wear, ensuring long-term reliability in demanding industrial washers usage where standard metal or plastic washers fail.

Specification Summary & Compliance

This flat washer adheres to inch system measurements with precise inner diameter of 0.312" and outer diameter of 0.75", compatible with 5/16" screw size. It maintains a thickness tolerance of 0.054-0.070" and Durometer 70A hardness for consistent performance. The product is fully RoHS 3 (2015/863/EU) compliant, meeting stringent environmental regulations, and is designed for operational temperatures from -20°F to 460°F, ensuring safety and durability in regulated industrial applications.