S-98189A500 0.562" ID x 1.375" OD ASME B18.21.1 General Purpose Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from A286 stainless steel construction ensures long-term reliability in harsh industrial environments
• Exceptional strength and durability with Rockwell C22 hardness maintains structural integrity under heavy loads
• Precise dimensional compatibility with 1/2" screws (0.562" ID, 1.375" OD) ensures perfect fit and optimal load distribution
• Heavy-duty performance with USS designation provides reliable service in demanding mechanical applications
• Industry-standard compliance with ASME B18.21.1 guarantees consistent quality and interchangeability
• Environmental regulation adherence through RoHS 3 and REACH compliance for global market acceptance
• Optimized thickness range (0.086-0.132") offers versatility while maintaining structural stability

Professional Applications & Engineering Value

This A286 stainless steel USS flat washer delivers exceptional engineering value in demanding industrial applications where corrosion resistance and mechanical strength are paramount. The high-strength A286 material combined with Rockwell C22 hardness provides superior performance in high-temperature environments and corrosive conditions, making it ideal for aerospace, chemical processing, and marine applications. The USS flat washer design ensures optimal load distribution for 1/2" fasteners, preventing surface damage and maintaining joint integrity. With its ASME B18.21.1 compliance and inch system measurements, this washer offers reliable performance in heavy machinery, structural assemblies, and industrial equipment where vibration resistance and long-term durability are critical requirements.

Specification Summary & Compliance

This USS flat washer features precise dimensional specifications including 0.562" inner diameter, 1.375" outer diameter, and thickness ranging from 0.086" to 0.132" for compatibility with 1/2" screws. Manufactured to ASME B18.21.1 standards for consistent quality and performance. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant (updated 06/14/2023, 235 SVHC), meeting current environmental regulations for industrial applications worldwide.