S-93783A030 0.301" ID x 0.603" OD High-Pressure Bonded Sealing Washers For Screw Heads

Key Features & Benefits at a Glance

• Superior sealing performance with a bonded Buna-N rubber seal that prevents fluid and gas leaks in demanding industrial environments.
• Exceptional corrosion resistance thanks to the zinc-plated steel construction, ensuring long-term durability and reliability.
• Wide temperature tolerance from -40°F to 225°F, making it suitable for applications in extreme thermal conditions.
• High-pressure handling capability with ratings up to 3600 psi for fluids and 200 psi for gases, ideal for hydraulic and pneumatic systems.
• Consistent dimensional accuracy with precise ID (0.301") and OD (0.603") for easy installation and secure fit on 5/16" screws.
• Optimized material hardness featuring Rockwell B71 for the steel washer and Durometer 55A for the seal, balancing strength and flexibility.
• Compliance with global standards including RoHS 3 and REACH, ensuring environmental safety and regulatory acceptance in industrial procurement.

Professional Applications & Engineering Value

This metal bonded washer is engineered to address common challenges in industrial sealing, such as fluid leakage and component failure under variable pressures and temperatures. The zinc-plated steel base provides robust structural integrity, while the Buna-N rubber seal offers excellent resistance to oils, water, and compression set, ensuring a reliable barrier in hydraulic systems, pneumatic equipment, and automotive assemblies. Its ability to maintain sealing efficiency from -40°F to 225°F makes it ideal for outdoor or high-temperature applications, reducing maintenance costs and downtime. By integrating a bonded design, it eliminates the risk of seal displacement, delivering consistent performance in industrial washers for machinery, pipelines, and heavy-duty fastening solutions.

Specification Summary & Compliance

The washer adheres to precise dimensional tolerances with an ID of 0.301", OD of 0.603", and thickness ranging from 0.045" to 0.055" for consistent fit in inch system applications. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets strict environmental and safety standards for industrial use. The material specifications, including Rockwell B71 hardness for the steel and Durometer 55A for the seal, confirm its durability and performance in high-pressure environments up to 3600 psi for fluids and 200 psi for gases.