S-93786A100 4.8 mm ID x 9.8 mm OD High-Pressure Bonded Sealing Washers For Screw Heads

Key Features & Benefits at a Glance

• Exceptional sealing performance with Buna-N rubber bonded to zinc-plated steel, preventing leaks in demanding hydraulic and pneumatic systems.
• Superior pressure resistance for reliable operation under extreme conditions, handling up to 15,200 psi for fluids and 200 psi for gases.
• Wide operational temperature range from -30°F to 220°F, ensuring consistent performance in both cold and high-heat industrial environments.
• Enhanced durability and corrosion resistance from the zinc-plated steel construction and Rockwell C26 hardness, extending service life.
• Optimal seal integrity due to the Durometer 85A Buna-N rubber, which provides excellent compression set resistance and a tight seal on M5 fasteners.
• Precise metric sizing with 4.8mm ID and 9.8mm OD for accurate fit and easy installation in standard M5 screw applications.
• Versatile industrial use in high-pressure sealing applications, reducing maintenance needs and downtime.

Professional Applications & Engineering Value

This M5 metal bonded washer is engineered to solve critical sealing challenges in industrial applications where fluid and gas containment is paramount. The zinc-plated steel body provides structural strength and corrosion resistance, while the integrally bonded Buna-N rubber seal ensures a leak-proof barrier even under high pressure conditions up to 15,200 psi. Its design addresses common failures in hydraulic and pneumatic systems, such as seal extrusion and temperature-induced degradation, by combining a Rockwell C26 hardened metal washer with a Durometer 85A elastomer that maintains flexibility from -30°F to 220°F. This makes it ideal for machinery, automotive, and heavy equipment, where reliability under extreme temperatures and pressures reduces the risk of system leaks and enhances operational safety.

Specification Summary & Compliance

This metric washer conforms to standard M5 screw sizing with an inner diameter of 4.8mm and outer diameter of 9.8mm, ensuring precise fit and dimensional accuracy. The zinc-plated steel construction and Buna-N rubber seal meet industry requirements for durability and performance. It is manufactured to withstand specified pressure and temperature ranges, and complies with common industrial standards for material quality and safety, though specific standard references (e.g., for materials) should be verified per application needs. The product is designed for use in high-pressure sealing environments and is suitable for systems requiring robust, long-lasting bonded seal washers.