S-90130A040 0.29" ID x 0.688" OD Rubber Sealing Washers

Key Features & Benefits at a Glance

• Superior sealing performance with EPDM rubber construction, preventing leaks and fluid ingress in demanding environments.
• Excellent vibration dampening to reduce noise, prevent loosening, and protect connected components from wear.
• Wide temperature resilience from -20°F to 212°F, ensuring reliable operation in both freezing and high-heat conditions.
• Chemical and weather resistance inherent to EPDM material, ideal for outdoor and industrial applications exposed to harsh elements.
• Consistent dimensional accuracy with a 0.29" ID and 0.688" OD, providing a precise fit for 5/16" screws and easy installation.
• Optimal hardness (Durometer 65A) offering a perfect balance of flexibility for sealing and firmness for durable performance.
• Compliance with major regulations including RoHS 3 and REACH, ensuring environmental safety and suitability for regulated industries.

Professional Applications & Engineering Value

This EPDM rubber flat washer is engineered to solve critical challenges in industrial applications where sealing, vibration, and temperature extremes are concerns. The black EPDM material provides exceptional resistance to water, steam, and many chemicals, making it ideal for plumbing, HVAC, automotive, and outdoor equipment. Its Durometer 65A hardness ensures it compresses effectively to create a tight seal without degrading over time, while its ability to withstand temperatures from -20°F to 212°F guarantees performance in both sub-zero and high-heat environments. This makes it a reliable component for vibration dampening and preventing fastener loosening in machinery, thereby reducing maintenance needs and enhancing system longevity.

Specification Summary & Compliance

This flat washer conforms to inch system measurements with an Inside Diameter (ID) of 0.29", Outside Diameter (OD) of 0.688", and Thickness of 0.078-0.108", designed specifically for 5/16" screw size. It is manufactured from EPDM rubber with a hardness of Durometer 65A and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety standards for industrial use.