S-93786A504 3.7 mm ID x 7 mm OD High-Pressure Bonded Sealing Washers For Screw Heads

Key Features & Benefits at a Glance

• Superior sealing performance with Buna-N rubber bonded to zinc-plated steel, preventing fluid and gas leaks in demanding environments.
• Exceptional pressure resistance handles up to 5500 psi for fluids and 200 psi for gases, ensuring reliable operation in high-pressure systems.
• Wide temperature tolerance from -10°F to 240°F, maintaining seal integrity and performance across various thermal conditions.
• Enhanced durability and corrosion resistance from the zinc-plated steel body with Rockwell B105 hardness, providing long service life.
• Optimized for M4 screw applications with precise 3.7mm ID and 7mm OD, ensuring easy installation and secure fit in metric assemblies.
• Reliable seal flexibility due to the Durometer 60A Buna-N rubber, which offers excellent compression set resistance for repeated use.
• Versatile industrial use combining metal strength and rubber sealing, ideal for automotive, hydraulic, and pneumatic systems.

Professional Applications & Engineering Value

This M4 metal bonded washer is engineered to address common industrial challenges such as fluid leakage, pressure fluctuations, and thermal expansion. The zinc-plated steel construction provides robust structural support and corrosion resistance, while the Buna-N rubber seal ensures a tight, resilient barrier against contaminants. Its ability to withstand extreme pressures up to 5500 psi for fluids and a broad temperature range from -10°F to 240°F makes it ideal for high-pressure hydraulic systems, pneumatic equipment, and automotive assemblies. By integrating metal and rubber, this washer reduces maintenance needs and enhances system reliability in harsh operating environments, delivering consistent performance where standard washers may fail.

Specification Summary & Compliance

This bonded washer features precise metric dimensions with an ID of 3.7mm and OD of 7mm, designed for M4 screw sizes. It adheres to standard manufacturing tolerances for consistent fit and function. The zinc-plated steel meets common industry standards for corrosion protection, and the Buna-N rubber (Nitrile) is widely recognized for its oil and chemical resistance. While specific compliance certifications are not listed, the materials used are typically in line with RoHS and REACH directives for environmental safety, ensuring suitability for global industrial applications requiring durable, high-performance sealing solutions.