S-91133A195 1.812" ID Square Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with galvanized steel construction, ensuring long-term durability in harsh industrial environments
• Optimal load distribution thanks to the 4" square design, preventing surface damage and maintaining joint integrity
• Precise compatibility with 1 3/4" screw sizes, featuring a 1.812" ID for secure, vibration-resistant fastening
• Enhanced mechanical strength from Rockwell B40 hardness, providing reliable performance under heavy loads
• Consistent thickness control between 0.220-0.280", ensuring uniform pressure and reducing installation issues
• Full regulatory compliance with RoHS 3 and REACH standards, meeting global environmental and safety requirements
• Dimensional accuracy in inch measurements, facilitating seamless integration with existing industrial systems

Professional Applications & Engineering Value

Engineered for demanding industrial applications, this galvanized steel square washer solves critical challenges in construction and heavy machinery. The 4" width and square configuration provide maximum surface contact, effectively distributing clamp load to prevent material deformation and bolt loosening under vibration. With a 1.812" ID precisely matched to 1 3/4" screw sizes, it eliminates play and ensures secure fastening in structural connections. The zinc coating offers exceptional corrosion protection, extending service life in outdoor or corrosive environments. These heavy-duty washers maintain their Rockwell B40 hardness under sustained pressure, making them ideal for bridge construction, industrial equipment assembly, and infrastructure projects where reliability is paramount.

Specification Summary & Compliance

This square washer features inch system dimensions with a 1.812" inner diameter, 4" width, and controlled thickness range of 0.220-0.280". Manufactured from galvanized steel with Rockwell B40 hardness, it meets standard industrial requirements for heavy-duty applications. The product is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel and REACH (EC 1907/2006) regulations as of January 17, 2023, ensuring environmental responsibility and workplace safety.