S-98026A113 0.438" ID x 1" OD ASME B18.21.1 General Purpose Washers

Key Features & Benefits at a Glance

• Superior load distribution with 1" outer diameter to prevent surface damage and fastener embedment
• Exceptional corrosion resistance through black protective coating for extended service life in harsh environments
• Maximum mechanical strength with Grade 8 classification and Rockwell C38 hardness for heavy-duty applications
• Precise dimensional fit with 3/8" internal diameter ensuring proper alignment with standard fasteners
• Industry-standard compliance meeting ASME B18.21.1 specifications for reliable performance
• Environmental responsibility with RoHS 3 and REACH compliance for sustainable operations
• Optimized thickness range (0.064-0.080") providing consistent spacing and vibration resistance

Professional Applications & Engineering Value

These Grade 8 USS flat washers deliver critical engineering solutions for industrial equipment, construction machinery, and heavy structural applications where corrosion resistance and mechanical strength are paramount. The black corrosion-resistant coated steel construction protects against environmental degradation while maintaining the Rockwell C38 hardness required for high-stress environments. Engineered to ASME B18.21.1 standards, these washers provide reliable performance in bolted connections subject to vibration, thermal cycling, and heavy loading conditions. The precise 3/8" ID ensures proper fitment with standard fasteners, preventing misalignment and distributing clamp load effectively across mating surfaces.

Specification Summary & Compliance

Manufactured to exacting dimensional standards with 0.438" internal diameter, 1" outer diameter, and thickness ranging 0.064-0.080". Complies with ASME B18.21.1 specifications for flat washers and meets Grade 8 strength requirements with Rockwell C38 hardness rating. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.