S-91133A125 0.688" ID Square Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with galvanized steel construction, extending service life in harsh environments
• Exceptional load distribution from the 2" square design, preventing surface damage and fastener loosening
• Precise fit for 5/8" screws with 0.688" inner diameter, ensuring secure fastening and vibration resistance
• Enhanced durability with Rockwell B40 hardness, maintaining structural integrity under heavy loads
• Reliable thickness consistency between 0.235-0.265", providing uniform pressure distribution
• Compliance with international regulations including RoHS 3 and REACH, ensuring safe usage in global markets
• Optimized for industrial applications with inch system measurements, facilitating easy integration into existing assemblies

Professional Applications & Engineering Value

This galvanized steel square washer delivers critical engineering advantages in demanding industrial settings. The zinc-coated surface treatment provides essential corrosion protection for outdoor construction, machinery assemblies, and structural applications where moisture exposure is common. The substantial 2" width creates an expanded bearing surface that effectively distributes clamping force, preventing joint failure and material deformation in heavy equipment. With its Rockwell B40 hardness rating, this washer maintains dimensional stability under sustained pressure, making it ideal for bolted connections in structural steelwork, industrial machinery, and transportation equipment. The precise 0.688" inner diameter ensures perfect compatibility with 5/8" screws, eliminating play and reducing maintenance frequency in vibration-prone environments.

Specification Summary & Compliance

This square washer features inch system measurements with 0.688" inner diameter, 2" width, and controlled thickness range of 0.235-0.265". Manufactured from galvanized steel with Rockwell B40 hardness, it 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) requirements updated to January 17, 2023, covering 233 Substances of Very High Concern. The product maintains standard industrial tolerances suitable for Class 2A fit applications.