S-5916K59 1.25" ID x 3" OD Chemical-Resistant Cushioning Washers

Key Features & Benefits at a Glance

• Superior Sealing Performance: Buna-N Rubber construction provides excellent fluid and gas sealing capabilities, preventing leaks in demanding industrial environments.
• Enhanced Vibration & Slip Resistance: The unique raised grid design creates a powerful locking grip, maintaining joint integrity under dynamic loads and high vibration.
li>Durable & Flexible Material: With a 63A Durometer hardness, this washer offers the ideal balance of flexibility for conformance and durability for long service life.
• Wide Temperature Tolerance: Withstands continuous exposure up to 200°F, making it suitable for a broad range of industrial and mechanical applications.
• Precision Inch Sizing: The 1.25" ID and 3" OD ensure a perfect fit for 1 1/4" screws, providing reliable performance and easy installation.
• Compliance & Safety Assurance: Meets RoHS 3 and REACH regulations, ensuring the washer is free from hazardous substances for safe use in regulated industries.
• Optimized Load Distribution: The specific grid width dimensions (0.625" raised, 0.375" indented) help distribute pressure evenly, protecting surfaces and enhancing seal longevity.

Professional Applications & Engineering Value

This Buna-N Rubber Raised Grid Washer is engineered to solve critical challenges in sealing and vibration management. Its raised grid pattern significantly increases the surface contact pressure, creating a mechanical lock that prevents loosening in high-vibration machinery, automotive assemblies, and heavy equipment. The Buna-N (Nitrile) material offers excellent resistance to oils, fuels, and many chemicals, making it an ideal sealing washer for hydraulic systems, pumps, and engines. The combination of its 63A durometer hardness and specific thickness ensures it compresses effectively to form a tight seal without over-stressing the flange, addressing common failure points in industrial bolted connections and extending maintenance intervals.

Specification Summary & Compliance

This washer conforms to Inch system dimensions with an Inside Diameter (ID) of 1.25" and Outside Diameter (OD) of 3". The thickness is specified between 0.469" and 0.531". It is manufactured from Black Buna-N Rubber with a hardness of Durometer 63A and is designed for use with 1 1/4" screws. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to strict environmental and safety standards for industrial components.