S-93781A032 0.447" ID x 0.906" OD High-Pressure Bonded Sealing Washers For Nuts

Key Features & Benefits at a Glance

• Superior sealing performance with Buna-N rubber bonded to steel prevents fluid and gas leaks in demanding applications
• Exceptional pressure resistance rated for 5000 psi fluid pressure ensures reliable performance in high-pressure systems
• Wide temperature tolerance from -30°F to 220°F maintains seal integrity across various operating environments
• Enhanced corrosion protection through zinc-plated steel construction extends service life in harsh conditions
• Optimized material combination featuring Rockwell B71 steel hardness and Durometer 55A rubber provides ideal balance of strength and flexibility
• Precision dimensional fit with 0.447" ID and 0.906" OD ensures proper alignment and distribution of clamping forces
• Regulatory compliance assurance with RoHS 3 and REACH compliance meets international environmental and safety standards

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 industrial challenges. The permanent bond between metal and elastomer creates a reliable barrier against fluid ingress and pressure loss in hydraulic systems, pneumatic equipment, and machinery requiring high-pressure sealing up to 5000 psi. Engineered for 7/16" fasteners, the washer's black Buna-N seal maintains flexibility across extreme temperature variations from -30°F to 220°F, preventing brittle failure in cold environments and maintaining compression in elevated temperatures. This makes it ideal for industrial applications in manufacturing, automotive, and fluid handling systems where consistent performance under variable conditions is essential for operational safety and equipment longevity.

Specification Summary & Compliance

This metal bonded washer features precise dimensional specifications including 0.447" inner diameter, 0.906" outer diameter, and thickness ranging from 0.073" to 0.083" for consistent performance. The assembly combines zinc-plated steel with Rockwell B71 hardness and Buna-N rubber seal with Durometer 55A hardness, engineered for 7/16" screw applications. The product demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and workplace safety standards are met for industrial distribution and use.