S-91128A339 1.062" ID Square Washers

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with black-oxide steel coating, extending service life in harsh industrial environments
• Superior load distribution thanks to the 3" square design, preventing surface damage and maintaining joint integrity
• Precision fit for 1" screws with 1.062" inner diameter, ensuring secure fastening and reducing installation errors
• Enhanced durability from Rockwell 15N80 hardness, providing reliable performance under heavy mechanical stress
• Regulatory compliance assurance with RoHS 3 and REACH standards, meeting global environmental and safety requirements
• Consistent dimensional stability with 0.235-0.265" thickness range, guaranteeing uniform performance across applications
• Reduced maintenance needs through robust steel construction, lowering long-term operational costs

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these square washers provide critical solutions for structural assemblies requiring superior load-bearing capacity. The black-oxide steel construction offers enhanced corrosion resistance, making them ideal for outdoor equipment, heavy machinery, and construction projects where environmental exposure is a concern. With their 3" width and precise 1.062" ID, they effectively distribute clamping force over larger surface areas, preventing material deformation in wood, metal, and composite assemblies. The Rockwell 15N80 hardness ensures consistent performance in high-vibration environments, while the square profile provides superior resistance to rotation compared to standard round washers. These characteristics make them particularly valuable in structural steel connections, industrial framing systems, and heavy equipment manufacturing where joint integrity is paramount.

Specification Summary & Compliance

Manufactured to inch system specifications with precise dimensional tolerances, this square washer features a 1.062" inner diameter, 3" width, and thickness range of 0.235-0.265". The product conforms to industry-standard hardness requirements (Rockwell 15N80) and demonstrates full compliance with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel, along with REACH (EC 1907/2006) compliance updated to January 17, 2023, addressing 233 Substances of Very High Concern.