S-93783A051 0.988" ID x 1.76" OD High-Pressure Bonded Sealing Washers For Screw Heads

Key Features & Benefits at a Glance

• Superior sealing performance with bonded Buna-N rubber that prevents fluid and gas leaks under extreme pressure conditions
• Exceptional corrosion resistance thanks to zinc-plated steel construction, ensuring long-term durability in harsh environments
• Wide temperature compatibility from -40°F to 225°F, maintaining seal integrity across diverse industrial applications
• High-pressure reliability with 7000 PSI fluid and 200 PSI gas ratings for demanding hydraulic and pneumatic systems
• Optimized mechanical strength from Rockwell B71 hardness steel core, resisting deformation under heavy loads
• Consistent sealing force with Durometer 55A rubber hardness providing ideal compression and recovery characteristics
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries

Professional Applications & Engineering Value

This metal bonded washer combines the structural integrity of zinc-plated steel with the exceptional sealing properties of Buna-N rubber to solve critical fluid containment challenges in industrial equipment. The permanent bond between metal and rubber eliminates gasket slippage while providing reliable sealing in high-vibration applications like hydraulic systems, pump assemblies, and compressed air equipment. Engineered for 1" fasteners, it maintains seal integrity across extreme temperature fluctuations from -40°F to 225°F, making it ideal for outdoor machinery, automotive systems, and processing equipment where thermal cycling would compromise conventional washers. The black Buna-N rubber seal offers excellent resistance to oils, fuels, and most industrial fluids, while the zinc plating provides sacrificial corrosion protection, significantly extending service life in corrosive environments.

Specification Summary & Compliance

Precision-engineered with 0.988" ID and 1.76" OD dimensions for perfect fitment with 1" fasteners. Features Rockwell B71 hardness steel core and Durometer 55A Buna-N rubber seal with thickness tolerance of 0.059-0.069". Manufactured to industry standards for metal bonded washers with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for global industrial applications.