S-90495A201 0.688" ID x 1.5" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc yellow-chromate plating, extending service life in harsh industrial environments
• Exceptional strength and durability from Grade 8 classification and Rockwell C38 hardness, preventing deformation under heavy loads
• Precise dimensional fit with 0.688" ID and 1.5" OD, ensuring reliable performance with 5/8" fasteners
• Enhanced load distribution due to flat washer design, reducing surface pressure and preventing joint loosening
• Compliance with environmental regulations including RoHS 3 and REACH, making them suitable for global industrial supply chains
• Consistent thickness tolerance between 0.110-0.140", providing uniform clamping force in assembly applications
• Ideal for heavy-duty applications where high-strength, corrosion-resistant flat washers are critical for safety and performance

Professional Applications & Engineering Value

This Grade 8 flat washer delivers exceptional engineering value through its zinc yellow-chromate plated steel construction, specifically designed to address common industrial challenges. The combination of Rockwell C38 hardness and precise dimensional specifications (0.688" ID, 1.5" OD) ensures reliable performance in heavy machinery, structural steel connections, and automotive assemblies where vibration resistance and joint integrity are paramount. The corrosion-resistant coating protects against environmental degradation in outdoor applications or humid conditions, while the flat washer design effectively distributes clamping force to prevent surface damage and maintain bolt tension. These industrial washers are engineered to withstand extreme pressure conditions common in construction equipment, manufacturing machinery, and transportation infrastructure, providing long-term reliability where fastener failure is not an option.

Specification Summary & Compliance

This heavy-duty flat washer features inch system measurements with precise internal diameter of 0.688" and external diameter of 1.5", specifically designed for use with 5/8" screws. Manufactured to Grade 8 strength standards with Rockwell C38 hardness rating, it maintains dimensional stability under high stress conditions. The product fully complies with RoHS 3 (2015/863/EU) regulations and REACH (EC 1907/2006) requirements (updated 06/14/2023, 235 SVHC), ensuring environmental responsibility and regulatory adherence for industrial applications worldwide.