S-93783A009 0.156" ID x 0.385" 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 applications
• Exceptional pressure resistance handling up to 8000 psi for fluids and 200 psi for gases, ensuring reliable performance in high-pressure systems
• Wide temperature tolerance from -40°F to 225°F, maintaining seal integrity across extreme environmental conditions
• Durable metal construction with Rockwell B71 hardness zinc-plated steel providing corrosion resistance and long service life
• Precision dimensional fit with 0.156" ID and 0.385" OD specifically engineered for No. 8 screws
• Optimized seal hardness with Durometer 55A Buna-N rubber offering perfect balance of flexibility and compression resistance
• Full regulatory compliance meeting 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 industrial assemblies where fluid containment and environmental protection are paramount. The zinc-plated steel construction provides structural integrity while the bonded black Buna-N seal creates an impermeable barrier against moisture, dust, and contaminants. Engineered for No. 8 screws in inch system applications, this sealed washer prevents joint failure in hydraulic systems, pneumatic equipment, and outdoor machinery exposed to temperature fluctuations from -40°F to 225°F. The metal-to-rubber bonding technology ensures the seal remains securely positioned during installation and throughout the product lifecycle, eliminating common issues with separate washers and O-rings that can shift or dislodge under vibration and pressure cycling.

Specification Summary & Compliance

This metal bonded washer features precise dimensional specifications with 0.156" inner diameter, 0.385" outer diameter, and 0.036-0.044" thickness range, engineered for optimal performance with No. 8 screws. The zinc-plated steel washer body maintains Rockwell B71 hardness while the Buna-N rubber seal provides Durometer 55A hardness for effective compression and sealing. The product fully complies with RoHS 3 (2015/863/EU) restrictions and REACH (EC 1907/2006) regulations regarding substance control, making it suitable for global industrial markets requiring environmental compliance.