S-98026A128 2.875" ID x 5.25" OD General Purpose Washers

Key Features & Benefits at a Glance

• Exceptional load distribution with 5.25" OD and 2.875" ID to prevent surface damage and joint loosening under heavy loads
• Superior corrosion resistance through zinc yellow-chromate plating for extended service life in harsh industrial environments
• Maximum strength reliability with Grade 8 classification and Rockwell C38 hardness for high-stress applications
• Precision compatibility designed specifically for 2 3/4" screws with consistent 0.228-0.320" thickness range
• Heavy-duty construction following USS standards for demanding mechanical and structural applications
• Regulatory compliance assurance with REACH compliance for safe use in industrial settings
• Dimensional stability maintained through precise inch system manufacturing tolerances

Professional Applications & Engineering Value

These USS flat washers deliver critical engineering solutions where high-strength fastening systems encounter extreme vibration, heavy loads, and corrosive elements. The zinc yellow-chromate plated steel construction provides superior corrosion resistance while maintaining the structural integrity required for heavy machinery, construction equipment, and industrial assemblies. With Grade 8 classification and Rockwell C38 hardness, these washers effectively distribute clamping forces across larger surface areas, preventing bolt head embedding and maintaining joint integrity in critical applications. The precise 2.875" ID and 5.25" OD dimensions ensure perfect fitment for 2 3/4" screw applications, making them ideal for structural steel connections, heavy equipment maintenance, and industrial machinery where failure is not an option.

Specification Summary & Compliance

This heavy-duty USS flat washer features precise dimensional specifications with 2.875" inner diameter, 5.25" outer diameter, and thickness ranging from 0.228" to 0.320". Manufactured to Grade 8 strength standards with Rockwell C38 hardness certification, the washer complies with USS flat washer designations in the inch measurement system. The zinc yellow-chromate plating on steel substrate provides enhanced corrosion protection while maintaining full compliance with REACH (EC 1907/2006) regulations regarding substance restrictions, ensuring environmental and workplace safety standards are met for industrial applications.