S-90131A635 0.406" ID x 0.734" OD Abrasion-Resistant Cushioning Washers

Key Features & Benefits at a Glance

• Superior vibration dampening with SBR rubber construction to reduce noise and prevent fastener loosening in dynamic applications
• Excellent sealing performance creates reliable moisture and dust barriers for protected assemblies
• Enhanced durability through polyester fiber reinforcement that resists compression set and maintains sealing force
• Optimal flexibility with 70A Durometer hardness for easy installation and consistent compression across surfaces
• Wide temperature tolerance up to 170°F (77°C) for reliable performance in various operating environments
• Precise dimensional fit with 0.406" ID specifically engineered for 3/8" screw applications
• Environmental compliance meeting both RoHS 3 and REACH standards for safe use in regulated industries

Professional Applications & Engineering Value

This SBR rubber flat washer delivers critical engineering solutions where vibration resistance and environmental sealing are paramount. The Durometer 70A hardness provides ideal compression characteristics while maintaining sufficient rigidity for repeated assembly cycles. With polyester fiber reinforcement, the washer resists permanent deformation under sustained pressure, ensuring long-term sealing performance in automotive, machinery, and electrical enclosures. The black SBR rubber material offers excellent resistance to weathering and compression set, making it suitable for outdoor equipment and industrial applications where temperature fluctuations up to 170°F are common. The precise 0.406" ID and 0.734" OD dimensions ensure proper fitment for 3/8" screw assemblies while providing adequate surface coverage for effective gasketing.

Specification Summary & Compliance

This flat washer features inch system dimensions with 0.406" inner diameter, 0.734" outer diameter, and 0.047-0.077" thickness range for precise fitment. Manufactured from SBR rubber with polyester fiber filler at Durometer 70A hardness, it maintains dimensional stability under compression. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial applications across multiple sectors.