S-98180A190 0.19" ID x 0.443" OD ASME B18.21.1 SAE Washers

Key Features & Benefits at a Glance

• Exceptional load distribution with precise 0.19" ID and 0.443" OD dimensions for No. 8 screws, preventing surface damage and loosening under vibration
• Superior corrosion resistance provided by zinc-flake coating, ensuring long-term reliability in harsh industrial environments
• High-strength performance backed by Grade 8 classification and Rockwell C38 hardness, maintaining integrity under extreme mechanical stress
• Reliable dimensional consistency manufactured to ASME B18.21.1 specifications, guaranteeing perfect fit and interchangeability
• Environmental compliance assurance with RoHS 3 and REACH compliance, meeting global regulatory standards for hazardous substance restrictions
• Optimized thickness range (0.036-0.065") providing ideal compression characteristics without compromising fastener alignment
• Enhanced durability through zinc-flake coated steel construction, resisting wear and maintaining performance through repeated assembly cycles

Professional Applications & Engineering Value

This Grade 8 SAE flat washer delivers critical engineering solutions where high-strength fastening systems encounter demanding conditions. The zinc-flake coated steel construction provides exceptional corrosion resistance, making it ideal for automotive assemblies, heavy machinery, and outdoor industrial equipment exposed to moisture and chemicals. The precise dimensional control ensures perfect compatibility with No. 8 screw applications, preventing joint failure by distributing clamp load evenly across connected surfaces. Engineers specify this washer to address common industrial challenges including vibration-induced loosening, galvanic corrosion, and premature fastener wear. The combination of Rockwell C38 hardness and ASME B18.21.1 compliance guarantees reliable performance in critical load-bearing applications where safety and longevity are paramount concerns.

Specification Summary & Compliance

This heavy-duty flat washer features precise inch system dimensions with 0.19" inner diameter and 0.443" outer diameter, manufactured from zinc-flake coated steel with Rockwell C38 hardness. The product conforms to ASME B18.21.1 standards for dimensional accuracy and mechanical properties, ensuring reliable performance in Grade 8 applications. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms adherence to environmental and substance restriction requirements, making it suitable for global industrial supply chains.