S-91133A212 11 mm ID Square Washers

Key Features & Benefits at a Glance

• Superior corrosion protection with galvanized steel construction for extended service life in harsh environments
• Exceptional load distribution from the 50mm square design, preventing surface damage and fastener loosening
• Precise M8 compatibility with 11mm ID ensuring perfect fit and optimal fastening performance
• Enhanced structural integrity due to 6.0mm thickness and Rockwell B40 hardness for heavy-duty applications
• Full regulatory compliance meeting RoHS 3 and REACH standards for global industrial use
• Reduced maintenance requirements through durable zinc coating that resists rust and degradation
• Versatile metric sizing compatible with international equipment and replacement part specifications

Professional Applications & Engineering Value

This M8 square washer delivers critical engineering solutions where standard washers fail. The galvanized steel construction provides essential corrosion resistance for outdoor equipment, marine applications, and industrial machinery exposed to moisture and chemicals. The square profile offers significantly larger surface contact than round washers, distributing clamping force more effectively to prevent material deformation and maintain joint integrity under heavy-duty loads. With its metric dimensions (50mm width, 11mm ID, 6.0mm thickness), this washer ensures precise compatibility with M8 fasteners in European and international equipment. The Rockwell B40 hardness guarantees the washer maintains its shape under extreme pressure, making it ideal for construction, automotive assembly, and industrial machinery where vibration resistance and long-term reliability are paramount.

Specification Summary & Compliance

This metric square washer features precise dimensions of 50mm width, 11mm internal diameter, and 6.0mm thickness specifically engineered for M8 screw applications. Manufactured from galvanized steel with Rockwell B40 hardness rating, it meets international standards for heavy-duty fastening. The product is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel and REACH (EC 1907/2006) regulations current as of January 17, 2023, ensuring environmental and safety standards for industrial procurement.