S-90850A300 0.541" ID x 1.092" OD ASME B18.21.1 General Purpose Washers

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc yellow-chromate plating, extending service life in harsh industrial environments
• Superior strength and durability from Grade 9 classification and Rockwell C40 hardness, preventing deformation under high loads
• Precise dimensional fit with 0.541" ID and 1.092" OD, ensuring optimal load distribution for 1/2" screws
• Reliable performance compliance meeting ASME B18.21.1 standards for consistent quality and interchangeability
• Enhanced safety and environmental responsibility with full RoHS 3 and REACH compliance, safe for regulated applications
• Optimized thickness range (0.090-0.112") providing ideal compression and vibration resistance in assembly systems
• Heavy-duty industrial suitability designed for high-stress applications requiring maximum fastener integrity

Professional Applications & Engineering Value

These Grade 9 flat washers deliver critical engineering solutions where high-strength performance and corrosion resistance are paramount. Manufactured from zinc yellow-chromate plated steel, they effectively combat galvanic corrosion and environmental degradation in demanding applications such as heavy machinery, structural steel connections, and industrial equipment assemblies. The precise 1/2" screw size compatibility ensures perfect fitment while the controlled thickness range maintains consistent clamping force. Engineered to ASME B18.21.1 specifications, these industrial washers prevent joint loosening from vibration and thermal cycling, significantly extending maintenance intervals and reducing downtime in critical fastening systems.

Specification Summary & Compliance

This flat washer features dimensional specifications of 0.541" ID, 1.092" OD, and thickness range of 0.090-0.112" manufactured to ASME B18.21.1 standards for inch system fasteners. The Grade 9 classification and Rockwell C40 hardness ensure consistent mechanical properties and load-bearing capacity. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental and safety requirements for industrial components.