S-90474A113 0.406" ID x 0.734" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Exceptional load distribution with precise 0.406" ID and 0.734" OD dimensions to prevent surface damage and fastener loosening under high stress
• Superior corrosion resistance from zinc yellow-chromate plating, extending service life in harsh industrial environments
• Maximum mechanical strength with Grade 8 classification and Rockwell C38 hardness for heavy-duty applications
• Reliable dimensional consistency manufactured to ASME B18.21.1 specifications for perfect fit with 3/8" fasteners
• Enhanced safety compliance meeting RoHS 3 and REACH regulations for environmentally responsible procurement
• Optimized thickness range (0.056-0.071") providing ideal compression characteristics without compromising structural integrity

Professional Applications & Engineering Value

These Grade 8 flat washers deliver critical engineering solutions where high-strength fastening systems encounter extreme mechanical stress and environmental challenges. The zinc yellow-chromate plated steel construction provides dual protection against galvanic corrosion and chemical degradation, making them ideal for heavy machinery assemblies, structural steel connections, and automotive applications. With Rockwell C38 hardness ensuring minimal deformation under load, these 3/8" washers maintain clamping force integrity in vibration-prone environments. The precise dimensional control per ASME B18.21.1 standards guarantees proper seating and uniform pressure distribution, preventing joint failure in critical industrial washers applications while meeting rigorous inch system specifications for North American manufacturing requirements.

Specification Summary & Compliance

Manufactured to exact ASME B18.21.1 dimensional standards with 0.406" inner diameter, 0.734" outer diameter, and 0.056-0.071" thickness range. The Grade 8 classification ensures superior tensile strength and mechanical properties, supported by Rockwell C38 hardness verification. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, including the latest SVHC updates, confirms environmental responsibility and workplace safety standards for global industrial applications.