S-98026A034 0.625" ID x 1.469" OD ASME B18.21.1 Oversized Washers

Key Features & Benefits at a Glance

• Exceptional Load Distribution - The 1.469" outer diameter provides a wide bearing surface to prevent surface damage and joint loosening under high vibration.
• Superior Corrosion Resistance - The Zinc Yellow-Chromate plating offers a robust barrier against rust and corrosion, extending service life in harsh industrial environments.
• High-Strength Reliability - Manufactured to Grade 8 standards, this washer delivers consistent performance for critical, high-stress applications.
• Precision Fit for 9/16" Fasteners - The 0.625" inner diameter ensures a secure and accurate fit, minimizing installation issues and improving assembly efficiency.
• Enhanced Durability - A Rockwell C38 hardness rating provides excellent resistance to wear and deformation under heavy loads.
• Regulatory Compliance - Meets ASME B18.21.1 specifications and is REACH compliant, ensuring material safety and adherence to international standards.
• Optimized Thickness Range - The 0.086-0.132" thickness provides the necessary compression and spacing for a reliable, long-lasting seal.

Professional Applications & Engineering Value

This Grade 8 USS flat washer is engineered to solve critical challenges in heavy machinery, structural steelwork, and industrial equipment assembly. The zinc yellow-chromate plated steel construction directly addresses the need for long-term corrosion resistance in environments exposed to moisture, chemicals, and outdoor elements. Its USS designation and compliance with ASME B18.21.1 ensure it can handle the high clamp loads and vibrational stresses common in construction, automotive, and manufacturing applications. By providing a reliable, high-strength interface, this washer prevents bolt loosening, protects sensitive surfaces from galling, and maintains joint integrity, thereby reducing maintenance cycles and downtime.

Specification Summary & Compliance

This washer conforms to the dimensional and mechanical requirements of the ASME B18.21.1 standard. Key specifications include an Inner Diameter of 0.625", Outer Diameter of 1.469", and a Thickness range of 0.086-0.132", designed for a 9/16" screw size. The material is Zinc Yellow-Chromate Plated Steel with a hardness of Rockwell C38, confirming its Grade 8 high-strength classification. The product is fully REACH (EC 1907/2006) compliant regarding substance restrictions.