S-93783A032 0.427" ID x 0.76" 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 3600 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 in extreme thermal environments
• Durable construction featuring Rockwell B71 hardness steel with corrosion-resistant zinc plating for long service life
• Precision dimensional fit with 0.427" ID specifically designed for 7/16" screws, ensuring proper installation and optimal sealing
• Compliance assurance with RoHS 3 and REACH regulations, meeting international environmental and safety standards
• Optimized seal performance with 55A Durometer Buna-N rubber providing ideal flexibility and compression recovery

Professional Applications & Engineering Value

These metal bonded washers with Buna-N rubber seals deliver critical sealing solutions for industrial applications where fluid containment and environmental protection are paramount. The zinc-plated steel construction provides excellent corrosion resistance while the bonded black Buna-N rubber creates a reliable barrier against moisture, dust, and contaminants. Engineered for 7/16" screw sizes, these washers solve common challenges in hydraulic systems, pneumatic equipment, and outdoor machinery by maintaining seal integrity under varying pressure and temperature conditions. The metal-to-rubber bonding technology ensures the rubber seal remains securely positioned during installation and operation, preventing rotation or displacement that could compromise sealing effectiveness in demanding industrial environments.

Specification Summary & Compliance

This metal bonded washer features precise dimensional specifications with 0.427" inner diameter, 0.76" outer diameter, and thickness ranging from 0.045" to 0.055". Manufactured to exacting standards for 7/16" screw applications, the washer combines zinc-plated steel (Rockwell B71 hardness) with Buna-N rubber seal (Durometer 55A) for optimal performance. The product fully complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and workplace safety. Temperature performance is certified from -40°F to 225°F with maximum pressure ratings of 3600 psi for fluids and 200 psi for gases.