S-90131A646 0.938" ID x 1.75" OD Abrasion-Resistant Cushioning Washers

Key Features & Benefits at a Glance

• Superior vibration damping and sealing with SBR rubber construction and Durometer 70A hardness for reliable performance in demanding environments
• Enhanced durability and tear resistance through polyester fiber reinforcement that maintains structural integrity under pressure
• Excellent chemical resistance for protection against oils, fluids, and industrial chemicals in harsh applications
• Precision dimensional fit with 1.75" OD and 0.938" ID specifically engineered for 7/8" screw sizes in inch system applications
• High-temperature stability maintaining performance up to 170°F for consistent operation in heated industrial environments
• Regulatory compliance assurance with RoHS 3 and REACH compliance for global market acceptance and environmental safety
• Optimal compression characteristics with 0.105-0.145" thickness range providing effective sealing and load distribution

Professional Applications & Engineering Value

This SBR rubber flat washer delivers exceptional engineering value in industrial settings where vibration isolation, chemical resistance, and reliable sealing are critical. The polyester fiber reinforcement significantly enhances the washer's structural integrity, preventing deformation under heavy loads and repeated compression cycles. With its Durometer 70A hardness, this black rubber washer provides optimal flexibility while maintaining sufficient rigidity for effective load distribution. Engineered for 7/8" screw size applications in the inch measurement system, it solves common industrial challenges including equipment vibration, fluid leakage, and chemical degradation. The combination of SBR rubber material and fiber reinforcement creates a durable solution for machinery, automotive, plumbing, and industrial equipment applications where temperature fluctuations and chemical exposure are frequent concerns.

Specification Summary & Compliance

This heavy-duty flat washer features precise dimensional specifications with 1.75" outer diameter, 0.938" inner diameter, and thickness range of 0.105-0.145" designed specifically for 7/8" screw applications. Manufactured from SBR rubber with polyester fiber filler and rated at Durometer 70A hardness, it delivers consistent performance across industrial standards. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant (updated 06/14/2023, 235 SVHC), meeting stringent environmental and safety regulations for industrial components. With a maximum operating temperature of 170°F, this washer maintains its mechanical properties and sealing capabilities within specified thermal ranges for reliable industrial performance.