S-93781A029 0.255" ID x 0.562" OD High-Pressure Bonded Sealing Washers For Nuts

Key Features & Benefits at a Glance

• Superior sealing performance with permanently bonded Buna-N rubber that prevents fluid and gas leakage in demanding applications
• Exceptional pressure resistance maintains seal integrity under extreme conditions up to 5000 psi for reliable operation
• Wide temperature compatibility performs consistently across -30°F to 220°F range for versatile industrial use
• Enhanced corrosion protection through zinc-plated steel construction that extends service life in harsh environments
• Optimized material hardness combines Rockwell B71 steel with Durometer 55A rubber for perfect balance of strength and flexibility
• Precision dimensional control ensures perfect fit for 1/4" fasteners with 0.255" ID and 0.562" OD specifications
• Regulatory compliance assurance meets RoHS 3 and REACH standards for global industrial applications

Professional Applications & Engineering Value

This metal bonded washer with Buna-N rubber seal addresses critical sealing challenges in hydraulic systems, pneumatic equipment, and industrial machinery where fluid containment is paramount. The zinc-plated steel construction provides structural integrity while resisting environmental corrosion, and the chemically resistant Buna-N rubber maintains elasticity across wide temperature variations. Engineered for high-pressure applications up to 5000 psi, this washer prevents costly downtime by eliminating leaks in pumps, valves, and fluid power systems. The permanent metal-to-rubber bond ensures the seal cannot separate during installation or vibration, making it ideal for industrial maintenance and OEM equipment where reliability is non-negotiable.

Specification Summary & Compliance

Precision manufactured to exacting dimensional standards with 0.255" inner diameter and 0.562" outer diameter specifications for perfect compatibility with 1/4" fasteners. The washer features Rockwell B71 hardness for the steel component and Durometer 55A for the Buna-N rubber seal, ensuring optimal performance characteristics. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental and safety standards for industrial components. The black Buna-N rubber seal provides consistent performance across the specified temperature range while maintaining sealing integrity under maximum pressure conditions.