S-98026A040 1.375" ID x 3" OD ASME B18.21.1 Oversized Washers

Key Features & Benefits at a Glance

• Exceptional Load Distribution with 3" outer diameter to prevent surface damage and maintain joint integrity under heavy loads
• Superior Corrosion Resistance through zinc yellow-chromate plating that provides durable protection in harsh industrial environments
• High-Strength Performance meeting Grade 8 standards for demanding applications requiring reliable fastening solutions
• Precise Fitment with 1.375" inner diameter specifically designed for 1 1/4" screw sizes, ensuring secure installation
• Enhanced Durability with Rockwell C38 hardness rating that maintains washer integrity under repeated stress and vibration
• Regulatory Compliance with REACH environmental standards and ASME B18.21.1 specifications for quality assurance
• Optimal Thickness Range (0.136-0.192") providing the perfect balance between strength and flexibility for various assembly requirements

Professional Applications & Engineering Value

This Grade 8 USS flat washer delivers critical engineering value in heavy-duty applications where failure is not an option. The zinc yellow-chromate plated steel construction addresses common industrial challenges by providing exceptional corrosion resistance while maintaining the high-strength characteristics required for structural applications. The precise 1.375" ID ensures perfect compatibility with 1 1/4" fasteners, eliminating play and maintaining alignment in critical assemblies. With its substantial 3" OD, this industrial washer effectively distributes clamping force across a wider surface area, preventing embedment and protecting softer materials from damage. These features make it ideal for construction equipment, heavy machinery, structural steel connections, and other demanding applications where vibration resistance and long-term reliability are paramount concerns for engineering teams.

Specification Summary & Compliance

This USS flat washer features inch system dimensions with 1.375" inner diameter and 3" outer diameter, manufactured from zinc yellow-chromate plated steel with Rockwell C38 hardness. The product conforms to ASME B18.21.1 standards for dimensional accuracy and performance requirements. As a Grade 8 fastener component, it meets high-strength classification standards. The washer is REACH compliant (EC 1907/2006) as of June 14, 2023, ensuring environmental responsibility and regulatory adherence for industrial applications worldwide.