S-91128A146 0.812" ID Square Washers

Key Features & Benefits at a Glance

• Exceptional Load Distribution: The 3" square design provides a larger surface area to evenly distribute pressure, preventing surface damage and loosening in heavy-duty applications.
• Superior Corrosion Resistance: Black-oxide steel finish offers reliable protection against rust and wear, extending the washer's lifespan in harsh industrial environments.
• High Hardness for Durability: Rockwell 15N80 hardness ensures the washer maintains its shape and strength under high stress, reducing deformation and failure risks.
• Precision Fit for 3/4" Screws: 0.812" inner diameter allows for a secure and accurate fit, minimizing play and enhancing assembly stability.
• Consistent Thickness Control: 0.235-0.265" thickness range ensures uniform performance and reliable spacing in various fastener setups.
• Compliance with Global Standards: Meets RoHS 3 and REACH regulations, ensuring safe and environmentally responsible use in international markets.
• Versatile Industrial Application: Ideal for construction, machinery, and structural assemblies where heavy loads and corrosion resistance are critical.

Professional Applications & Engineering Value

This heavy-duty square washer is engineered to address common challenges in industrial settings, such as bolt loosening due to vibration and surface indentation under high loads. Made from black-oxide steel, it combines the inherent strength of steel with a corrosion-resistant coating, making it suitable for outdoor or moisture-exposed applications like construction equipment, agricultural machinery, and structural steel connections. The 3" width and precise 0.812" inner diameter ensure optimal load distribution and a snug fit for 3/4" screws, reducing maintenance needs and enhancing the longevity of assemblies. With a Rockwell 15N80 hardness, it withstands repetitive stress without compromising integrity, providing reliable performance in demanding environments where durability and precision are paramount.

Specification Summary & Compliance

This square washer adheres to inch system measurements with an inner diameter of 0.812", thickness range of 0.235-0.265", and width of 3", designed for use with 3/4" screws. It meets industry standards for hardness (Rockwell 15N80) and is compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel, as well as REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial applications.