S-91122A214 0.688" ID Square Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 Stainless Steel construction, ideal for harsh environments and extending service life.
• Exceptional load distribution provided by the 2" square design, minimizing surface pressure and preventing material damage.
• Reliable hardness and durability with a Rockwell B84 rating, ensuring the washer maintains its shape under high stress.
• Precise fit for 5/8" screws with a 0.688" inner diameter, ensuring secure fastening and reducing installation errors.
• Consistent performance and thickness ranging from 0.112" to 0.128", guaranteeing uniform compression and vibration resistance.
• Compliance with major environmental regulations including RoHS 3 and REACH, making it safe for various industrial applications.
• Broad compatibility with inch-system fasteners, simplifying sourcing for maintenance and assembly projects.

Professional Applications & Engineering Value

This heavy-duty square washer is engineered to solve critical challenges in demanding industrial settings. The 18-8 Stainless Steel material offers excellent corrosion resistance, making it suitable for applications exposed to moisture, chemicals, and outdoor elements, such as construction, marine hardware, and chemical processing equipment. Its square shape and substantial 2" width provide a larger bearing surface compared to standard round washers, effectively distributing clamp load and preventing bolt head or nut embedding into soft materials. This design is particularly valuable for securing 5/8" screws in structural assemblies, machinery frames, and heavy equipment, where vibration resistance and long-term durability are paramount. The consistent thickness and Rockwell B84 hardness ensure reliable performance under static and dynamic loads, reducing maintenance frequency and downtime.

Specification Summary & Compliance

This square washer conforms to standard inch system dimensions with an inner diameter of 0.688" and a thickness range of 0.112" to 0.128". It is manufactured from 18-8 Stainless Steel and meets common industry requirements for fit and function with 5/8" screw sizes. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for use in regulated markets.