S-98026A125 1.625" ID x 3.5" OD General Purpose Washers

Key Features & Benefits at a Glance

• Exceptional load distribution with 3.5" OD and 1.625" ID for superior surface area coverage, preventing joint loosening under heavy loads
• Superior corrosion resistance with black corrosion-resistant coating, extending service life in harsh industrial environments
• Maximum mechanical strength from Grade 8 classification and Rockwell C38 hardness, ensuring reliable performance in high-stress applications
• Precision dimensional compatibility with 1 1/2" screw sizes and USS standard design, guaranteeing proper fit and function
• Enhanced durability through controlled thickness (0.136-0.160"), maintaining structural integrity under repeated loading cycles
• Compliant with global regulations including RoHS 3 and REACH, meeting international environmental and safety standards
• Optimized for heavy-duty applications with inch system measurements, providing reliable performance in demanding mechanical assemblies

Professional Applications & Engineering Value

These Grade 8 USS flat washers deliver critical engineering solutions where corrosion resistance and structural integrity are paramount. The black corrosion-resistant coated steel construction effectively combats environmental degradation in outdoor installations, chemical processing facilities, and marine applications. With their substantial 3.5" outer diameter, these washers distribute clamping forces across wider surface areas, preventing material deformation and maintaining bolt preload in heavy machinery, structural steel connections, and industrial equipment. The Rockwell C38 hardness ensures the washers maintain their form under extreme pressure, while the precise 1.625" inner diameter provides optimal clearance for 1 1/2" fasteners, eliminating installation issues and ensuring reliable performance in critical industrial applications requiring high-strength fastening solutions.

Specification Summary & Compliance

Manufactured to USS (United States Standard) specifications with inch system measurements: 1.625" ID, 3.5" OD, and thickness range of 0.136-0.160". These washers meet Grade 8 strength requirements with Rockwell C38 hardness and are designed for 1 1/2" screw sizes. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental responsibility and workplace safety standards are maintained.