S-93783A033 0.49" ID x 0.88" OD High-Pressure Bonded Sealing Washers For Screw Heads

Key Features & Benefits at a Glance

• Superior sealing performance with Buna-N rubber bonded to steel, preventing fluid and gas leaks in demanding applications
• Exceptional pressure resistance handles up to 4200 psi for fluids and 200 psi for gases, ensuring reliable operation in high-pressure systems
• Wide temperature tolerance from -40°F to 225°F, maintaining seal integrity in extreme thermal environments
• Durable zinc-plated steel construction with Rockwell B71 hardness provides excellent corrosion resistance and mechanical strength
• Optimized seal hardness at Durometer 55A offers perfect balance between compression and resilience for long service life
• Precise dimensional compatibility with 0.49" ID and 0.88" OD designed specifically for 1/2" screws, ensuring perfect fit and function
• Full regulatory compliance with RoHS 3 and REACH standards, meeting international environmental and safety requirements

Professional Applications & Engineering Value

This metal bonded washer combines the structural integrity of zinc-plated steel with the sealing reliability of Buna-N rubber to solve critical industrial challenges. The bonded design eliminates separate seal components, preventing installation errors and reducing assembly time in hydraulic systems, pneumatic equipment, and industrial machinery. The black Buna-N rubber seal maintains flexibility across extreme temperature ranges while the Rockwell B71 hardness steel washer provides consistent clamping force. This engineered solution addresses common failure points in high-pressure fluid applications where standard washers would compromise system integrity, making it ideal for OEM manufacturing and maintenance operations requiring dependable sealing washers for 1/2" screws.

Specification Summary & Compliance

This metal bonded washer features precise inch dimensions with 0.49" inner diameter and 0.88" outer diameter, specifically engineered for 1/2" screw applications. The construction combines zinc-plated steel (Rockwell B71 hardness) with Buna-N rubber seal (Durometer 55A hardness) to withstand operational pressures up to 4200 psi for fluids and 200 psi for gases. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial use across global markets.