S-93852A179 0.938" ID x 2.25" OD ASME B18.21.1 USS Washers

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with black-oxide coated 18-8 stainless steel construction, ideal for harsh industrial environments
• Superior load distribution through USS flat design with 2.25" outer diameter, preventing surface damage and joint loosening
• Enhanced durability with Rockwell B68 hardness, maintaining structural integrity under high-stress applications
• Precise fit and alignment with 7/8" inner diameter and 0.938" ID, ensuring secure fastening for inch-system components
• Reliable performance standardization through ASME B18.21.1 compliance, guaranteeing interchangeability and quality
• Environmental safety assurance with RoHS 3 and REACH compliance, meeting global regulatory standards for industrial use
• Optimal thickness range (0.136-0.192") providing consistent spacing and vibration resistance in heavy machinery assemblies

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these black-oxide 18-8 stainless steel USS flat washers deliver critical protection against galvanic corrosion and chemical exposure while maintaining dimensional stability. The USS flat washer design with substantial 2.25" OD effectively distributes clamping forces across wider surfaces, preventing material deformation in structural steel connections, heavy equipment manufacturing, and marine applications. The black-oxide surface treatment enhances corrosion resistance beyond standard stainless steel while providing minimal light reflection for specialized installations. With precise 7/8" inner diameter compatibility and robust Rockwell B68 hardness, these washers maintain bolt tension integrity in high-vibration machinery, pipeline systems, and outdoor infrastructure projects where reliability and longevity are paramount.

Specification Summary & Compliance

Manufactured to ASME B18.21.1 dimensional standards with inch-system measurements including 0.938" ID, 2.25" OD, and thickness range of 0.136-0.192". The 18-8 stainless steel material with black-oxide finish ensures consistent performance across industrial applications. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms environmental safety and restricted substance adherence for global supply chain integration.