S-91133A160 0.812" ID Square Washers

Key Features & Benefits at a Glance

• Superior load distribution with a large 3" square surface area to prevent surface damage and fastener loosening under heavy loads
• Enhanced corrosion resistance thanks to the galvanized steel construction, ensuring long-term durability in harsh industrial environments
• Excellent mechanical strength with Rockwell B40 hardness to withstand high pressure and maintain shape under extreme conditions
• Precise compatibility with 3/4" screw sizes and 0.812" inner diameter for secure, vibration-resistant fastening assemblies
• Optimal thickness control (0.235-0.265") ensures consistent performance and reliable spacing in critical applications
• Full regulatory compliance with RoHS 3 and REACH standards, making them suitable for global industrial supply chains
• Versatile industrial application in construction, machinery, and heavy equipment where reliable load-bearing washers are essential

Professional Applications & Engineering Value

This heavy-duty square washer is engineered to solve common industrial fastening challenges where standard washers fail. The galvanized steel construction provides exceptional corrosion resistance, making it ideal for outdoor equipment, structural steel connections, and machinery exposed to moisture or chemicals. The square design offers superior load distribution compared to round washers, preventing embedment into soft materials and reducing point loading on surfaces. With precise 0.812" inner diameter matching 3/4" screw sizes and controlled thickness between 0.235-0.265", these industrial washers maintain consistent clamping force in high-vibration environments like heavy machinery, construction frameworks, and transportation equipment. The combination of Rockwell B40 hardness and regulatory compliance ensures reliable performance in demanding applications while meeting international environmental standards.

Specification Summary & Compliance

This square washer features inch system dimensions with 3" width, 0.812" inner diameter, and thickness ranging 0.235-0.265" for precise fitment. Manufactured from galvanized steel with Rockwell B40 hardness rating, it complies with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel and REACH (EC 1907/2006) compliance as of January 17, 2023 (233 SVHC). The washer is engineered for use with 3/4" screw sizes in heavy-duty industrial applications requiring reliable load distribution and corrosion protection.