S-91128A313 22 mm ID Square Washers

Key Features & Benefits at a Glance

• Enhanced load distribution with 50mm width square design prevents fastener embedment and surface damage
• Superior corrosion resistance through black-oxide steel construction for extended service life in harsh environments
• Exceptional hardness rating of Rockwell 15N80 ensures dimensional stability under heavy loads
• Precise M16 compatibility with 22mm inner diameter for perfect fit and optimal performance
• Heavy-duty thickness of 6.0mm provides substantial bearing surface for high-stress applications
• Regulatory compliance assurance with RoHS 3 and REACH standards for global industrial use
• Metric system standardization ensures seamless integration with international equipment and specifications

Professional Applications & Engineering Value

This M16 square washer delivers critical engineering solutions where standard round washers fall short. The black-oxide steel construction provides superior corrosion protection in demanding industrial environments, while the square configuration offers significantly larger surface contact area than circular equivalents. This design characteristic is particularly valuable in construction, heavy machinery, and structural applications where load distribution is paramount to prevent material deformation and joint failure. The Rockwell 15N80 hardness ensures the washer maintains its structural integrity under extreme pressure, making it ideal for bolted connections subject to vibration, dynamic loads, and thermal cycling. Engineers specify this metric square washer for applications requiring reliable, long-term fastening performance without compromising on regulatory compliance or material quality.

Specification Summary & Compliance

This heavy-duty square washer features precise metric dimensions with 22mm inner diameter, 50mm width, and 6.0mm thickness, engineered to exacting manufacturing standards for M16 fastener applications. The component meets Rockwell 15N80 hardness specifications and complies with RoHS 3 (2015/863/EU) with exemption 6(a) for lead as an alloying element in steel, along with full REACH (EC 1907/2006) compliance as of January 17, 2023, covering 233 Substances of Very High Concern. These certifications ensure the washer meets international environmental and safety standards for industrial use.