S-99041A219 0.406" ID Square Washers

Key Features & Benefits at a Glance

• Enhanced Corrosion Resistance: Zinc-plated steel construction protects against rust and degradation, extending service life in harsh industrial environments.
• Superior Load Distribution: 3" square width and 0.112-0.127" thickness provide a broad, stable bearing surface to prevent fastener loosening and surface damage.
• Precise Fit for 3/8" Fasteners: 0.406" inner diameter ensures accurate alignment and secure installation with standard 3/8" screws, reducing assembly errors.
• Durable Mechanical Performance: Rockwell B40 hardness offers excellent resistance to deformation under high stress, maintaining integrity in heavy-duty applications.
• Environmental & Regulatory Compliance: Meets RoHS 3 and REACH standards, ensuring safe use in regulated industries without hazardous substances.
• Wide Industrial Compatibility: Inch system sizing and square shape make it ideal for machinery, construction, and equipment where standard square washers are specified.
• Cost-Effective Reliability: Combines robust material and precise dimensions to minimize replacement frequency and maintenance costs.

Professional Applications & Engineering Value

This heavy-duty square washer is engineered to address common industrial challenges such as uneven load distribution and corrosion-induced failure. Made from zinc-plated steel, it provides a reliable barrier against moisture and chemicals, crucial for outdoor equipment, structural frameworks, and machinery subjected to variable stresses. The square design with a 3-inch width increases the contact area significantly compared to round washers, reducing point loading and preventing surface indentation on soft materials. Its 0.406" ID and compatibility with 3/8" screws ensure quick, error-free installation in assembly lines, while the Rockwell B40 hardness guarantees that the washer retains its shape under sustained pressure, avoiding costly downtime. Ideal for construction, automotive, and industrial maintenance, this washer delivers consistent performance where vibration resistance and longevity are priorities.

Specification Summary & Compliance

This square washer adheres to inch system measurements with an inner diameter of 0.406", thickness range of 0.112-0.127", and width of 3", designed for use with 3/8" screws. It meets standard dimensional tolerances for industrial washers and is manufactured from zinc-plated steel with a Rockwell B40 hardness rating for consistent mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted substances and alignment with global environmental safety requirements.