S-91133A215 18 mm ID Square Washers

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with galvanized steel construction for reliable performance in humid or outdoor industrial environments
• Superior load distribution due to the 50mm square design, preventing surface damage and maintaining joint integrity under high stress
• Precise M14 screw compatibility with 18mm inner diameter ensuring secure, vibration-resistant fastening in metric assemblies
• Exceptional durability from Rockwell B40 hardness, offering long-term wear resistance and reduced replacement frequency
• Regulatory compliance assurance with RoHS 3 and REACH standards, meeting global environmental and safety requirements for industrial applications
• Optimized thickness stability at 6.0mm to maintain consistent clamping force and resist deformation under heavy loads
• Versatile square profile that provides increased surface contact area, minimizing loosening in dynamic or high-torque scenarios

Professional Applications & Engineering Value

This galvanized steel square washer is engineered to address common industrial fastening challenges, such as corrosion-induced failure and load concentration. The zinc coating provides a protective barrier against moisture and chemicals, extending service life in construction, machinery, and outdoor equipment. Its 50mm width and 6.0mm thickness ensure even pressure distribution, reducing the risk of material fatigue around M14 screw connections. Ideal for heavy-duty applications, this metric washer maintains structural integrity in high-vibration environments, from assembly lines to infrastructure projects, while the square shape prevents rotation during installation for faster, more reliable setups.

Specification Summary & Compliance

This square washer features an 18mm inner diameter, 50mm width, and 6.0mm thickness, designed for precise fit with M14 metric screws. Manufactured to standard dimensional tolerances, it ensures consistent performance in industrial fastening systems. The product is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead in steel alloys and adheres to REACH (EC 1907/2006) regulations, including the latest SVHC updates as of January 2023, confirming its suitability for regulated markets and sustainable procurement policies.