S-90131A638 0.505" ID x 0.75" OD Abrasion-Resistant Cushioning Washers

Key Features & Benefits at a Glance

• Superior vibration dampening with SBR rubber construction and Durometer 70A hardness for reliable shock absorption in industrial machinery
• Enhanced durability and tear resistance due to polyester fiber filler, extending service life in demanding applications
• Precise fit for 1/2" screws with 0.505" ID and 0.75" OD, ensuring proper alignment and effective sealing
• Reliable performance in moderate heat, capable of withstanding temperatures up to 170°F without degradation
• Excellent sealing properties to prevent fluid and dust ingress, protecting sensitive components
• Compliance with environmental regulations, meeting RoHS 3 and REACH standards for safe use in regulated industries
• Consistent thickness (0.047-0.077") for uniform pressure distribution and stable fastening

Professional Applications & Engineering Value

This SBR rubber flat washer is engineered to address common industrial challenges such as equipment vibration, fluid leakage, and component wear. The Durometer 70A hardness provides optimal flexibility for effective vibration resistance, while the polyester fiber filler reinforces the structure against tearing under repetitive stress. Ideal for sealing applications in automotive assemblies, machinery mounts, and electrical enclosures, it prevents corrosion by blocking moisture and contaminants. Its ability to maintain integrity up to 170°F makes it suitable for environments with moderate thermal fluctuations, ensuring long-term reliability in industrial settings without compromising performance.

Specification Summary & Compliance

This washer adheres to inch system measurements with an ID of 0.505", OD of 0.75", and thickness ranging from 0.047" to 0.077", designed specifically for 1/2" screw size. It conforms to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances and safe for various industrial uses. The material specifications include SBR rubber with a Durometer 70A hardness and polyester fiber filler, providing consistent performance in alignment with standard industrial requirements for flat washers.