S-99041A122 0.812" ID Square Washers

Key Features & Benefits at a Glance

• Superior load distribution with 4" square design to prevent surface damage and fastener pull-through
• Enhanced corrosion resistance through zinc-plated steel construction for extended service life
• Precise fitment with 0.812" inner diameter specifically engineered for 3/4" screw applications
• Exceptional durability with Rockwell B40 hardness rating to withstand heavy mechanical stress
• Reliable performance in demanding industrial environments with consistent 0.220-0.280" thickness
• Full regulatory compliance meeting RoHS 3 and REACH standards for global industrial use
• Optimized for inch-system applications ensuring compatibility with standard industrial equipment

Professional Applications & Engineering Value

This heavy-duty square washer delivers exceptional engineering value in applications requiring maximum load distribution and surface protection. The zinc-plated steel construction provides superior corrosion resistance, making it ideal for outdoor equipment, structural steel connections, and machinery assembly where environmental exposure is a concern. The square configuration offers significantly greater surface contact area compared to round washers, effectively preventing embedment into softer materials and distributing clamping forces evenly across joined surfaces. Specifically designed for 3/4" screw applications in inch-system environments, this washer maintains structural integrity under heavy loads while the controlled thickness range ensures consistent performance in bolted joint assemblies. The combination of material strength and geometric design solves common industrial challenges of joint relaxation and surface damage in high-vibration applications.

Specification Summary & Compliance

This industrial square washer features precise dimensional specifications including 0.812" inner diameter, 4" width, and thickness range of 0.220-0.280" for consistent performance. Manufactured from zinc-plated steel with Rockwell B40 hardness, the product maintains dimensional stability under load. The washer complies with RoHS 3 (2015/863/EU) standards under exemption 6(a) for lead as an alloying element in steel and is fully REACH (EC 1907/2006) compliant with the latest SVHC requirements as of January 17, 2023. Engineered specifically for inch-system applications and 3/4" screw sizes, this washer meets industrial standards for heavy-duty fastening applications.