S-93786A501 1.8 mm ID x 4.5 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, effectively preventing fluid and gas leaks in demanding applications.
• Exceptional pressure resistance handles up to 7300 psi for fluids and 200 psi for gases, ensuring reliable performance in high-pressure systems.
• Wide operational temperature range from -10°F to 240°F, maintaining seal integrity and functionality in both extreme cold and moderate heat.
• Enhanced durability and corrosion resistance provided by the zinc-plated steel body with a Rockwell B105 hardness, offering long service life.
• Precision fit for M2 screws with a 1.8mm ID and 4.5mm OD, ensuring easy installation and optimal load distribution.
• Reliable seal material properties from Durometer 60A Buna-N rubber, providing excellent compression set and resistance to oils and chemicals.
• Robust construction for industrial use, combining metal strength with an elastomer seal to withstand vibration and mechanical stress.

Professional Applications & Engineering Value

This M2 metric bonded washer is engineered to solve critical sealing challenges in precision assemblies. The zinc-plated steel body provides structural integrity and corrosion resistance, while the Buna-N rubber seal ensures a tight, durable barrier against fluids and gases. Ideal for industrial applications such as pneumatic systems, fluid handling equipment, and compact electronic enclosures, it addresses common failures from pressure fluctuations and thermal cycling. By integrating a metal bonded design, it eliminates the need for separate components, simplifying inventory and reducing assembly time. This washer delivers reliable performance in high-pressure and variable temperature environments, making it a vital component for engineers seeking to enhance product longevity and prevent costly leaks in M2 screw fastening systems.

Specification Summary & Compliance

This washer features precise dimensions with an ID of 1.8 mm, OD of 4.5 mm, and thickness of 0.9-1.1 mm, designed for M2 screw compatibility per metric standards. It is manufactured from zinc-plated steel with a hardness of Rockwell B105 and a Buna-N rubber seal rated at Durometer 60A. The product complies with industry norms for material performance and is suitable for use in applications requiring resistance to fluids and gases, adhering to general engineering specifications for bonded washers. It meets common regulatory guidelines for material safety, though specific compliance such as RoHS or REACH should be verified per batch.