S-99041A129 1.312" ID Square Washers

Key Features & Benefits at a Glance

• Superior load distribution with 2" square design for maximum surface contact and reduced point pressure
• Enhanced corrosion resistance through zinc-plated steel construction for extended service life in harsh environments
• Precision compatibility with 1 1/4" screw sizes and 1.312" inner diameter for secure, vibration-resistant fastening
• Exceptional mechanical strength with Rockwell B40 hardness rating to withstand heavy loads and prevent deformation
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe, environmentally responsible manufacturing
• Consistent dimensional accuracy with 0.220-0.280" thickness range ensuring reliable performance in inch-system applications
• Versatile industrial application across construction, machinery, and structural assemblies requiring heavy-duty fastening solutions

Professional Applications & Engineering Value

This zinc-plated steel square washer addresses critical engineering challenges in heavy-duty industrial applications where conventional washers fail. The square configuration provides maximum load distribution, preventing surface damage and material compression in structural steel connections, machinery bases, and construction frameworks. The Rockwell B40 hardness ensures the washer maintains its structural integrity under extreme pressure, while the zinc plating offers essential corrosion protection in demanding environments. Engineered specifically for 1 1/4" screw applications with precise 1.312" ID, this industrial-grade washer eliminates loosening from vibration and thermal cycling, making it ideal for permanent installations requiring long-term reliability and maintenance-free performance.

Specification Summary & Compliance

Manufactured to exacting inch system standards with 1.312" inner diameter and 2" width dimensions, this square washer maintains consistent 0.220-0.280" thickness tolerance for reliable fitment. The product complies with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel and meets REACH (EC 1907/2006) compliance standards as of January 17, 2023, addressing 233 Substances of Very High Concern. The zinc-plated steel construction and Rockwell B40 hardness rating ensure mechanical performance meets industrial fastening requirements for construction, machinery, and structural applications.