S-91128A315 28 mm ID Square Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide steel coating for extended service life in harsh environments
• Exceptional load distribution thanks to the 50mm square design, preventing surface damage and fastener loosening
• Precise M22 screw compatibility with 28mm inner diameter ensuring secure, vibration-resistant fastening
• Enhanced durability from Rockwell 15N80 hardness, maintaining structural integrity under heavy loads
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe industrial use
• Optimal thickness-to-strength ratio with 6.0mm profile providing stability without adding excessive weight
• Metric system standardization ensuring seamless integration with international equipment and components

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this M22 square washer addresses critical challenges in machinery assembly, structural steelwork, and equipment manufacturing. The black-oxide steel construction provides superior corrosion resistance, significantly outperforming standard finishes in humid or chemically aggressive environments. The square configuration delivers enhanced load distribution, preventing embedment into soft materials and maintaining clamping force under vibration. With its 28mm ID precision and 50mm width, this metric square washer creates stable bearing surfaces for M22 fasteners in high-stress connections, reducing maintenance frequency and preventing costly downtime in construction, automotive, and heavy equipment sectors.

Specification Summary & Compliance

This heavy-duty washer features precise dimensional specifications with 28mm inner diameter, 50mm width, and 6.0mm thickness. Manufactured from black-oxide steel with Rockwell 15N80 hardness for consistent performance. Compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel and REACH (EC 1907/2006) standards as of 01/17/2023, ensuring environmental and safety regulations are met for industrial applications worldwide.