S-94708A413 0.33" ID x 0.75" OD Bonded Sealing Washers

Key Features & Benefits at a Glance

• Superior Weatherproof Sealing: The permanently bonded neoprene rubber seal (Durometer 65A) provides a reliable, long-lasting barrier against moisture, dust, and air, protecting your assemblies in harsh environments.
• Exceptional Corrosion Resistance: The Hot-Dipped Galvanized Steel base offers robust protection against rust and corrosion, significantly extending the service life of the washer and the fastened components.
• Wide Operational Temperature Range: Performs reliably in extreme conditions, maintaining seal integrity from -40°F to 250°F, making it suitable for both outdoor and high-temperature industrial applications.
• Optimized for 5/16" Fasteners: With a precise 0.33" ID and 0.75" OD, this washer ensures a perfect fit and uniform load distribution for 5/16" screws, enhancing joint stability.
• Durable Bonded Construction: The metal-to-rubber bond is engineered to prevent separation, ensuring the seal remains securely in place during installation and throughout the product's lifecycle.
• Compliance for Global Markets: Meets RoHS 3 and REACH compliance standards, ensuring the product is free of hazardous substances and suitable for use in regulated industries worldwide.
• Versatile Industrial Application: The combination of a sturdy metal body and a resilient seal makes it an ideal, all-in-one solution for applications requiring both a load-bearing washer and an effective seal.

Professional Applications & Engineering Value

This metal bonded washer is engineered to solve the common industrial challenge of simultaneously managing mechanical load and environmental sealing. The Hot-Dipped Galvanized Steel body provides the structural integrity needed to prevent loosening and surface damage under bolt heads, while the integrally bonded black Neoprene rubber seal (Durometer 65A) eliminates the need for separate gaskets or sealants. This design is critical in electrical enclosures, outdoor machinery, automotive assemblies, and HVAC systems, where preventing ingress of water, dust, and other contaminants is paramount. By combining a high-strength metal washer with a compliant, temperature-resistant seal, it streamlines assembly processes, reduces part count, and delivers reliable, long-term weatherproof sealing performance in demanding conditions.

Specification Summary & Compliance

This washer is manufactured to precise dimensional standards with an Inside Diameter (ID) of 0.33" and an Outside Diameter (OD) of 0.75", designed specifically for use with 5/16" screws in inch-based systems. The thickness is controlled within 0.086-0.116". It 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 hazardous substances. This ensures the component is suitable for global supply chains and industries with rigorous compliance requirements.