S-91128A915 2.062" ID Square Washers

Key Features & Benefits at a Glance

• Superior Load Distribution with a large 4" square surface area, preventing surface damage and loosening under high stress.
• Enhanced Corrosion Resistance from the black-oxide steel finish, extending service life in harsh or outdoor industrial environments.
• Exceptional Mechanical Strength provided by Rockwell 15N80 hardness, ensuring the washer maintains its shape and function under heavy loads.
• Precise Compatibility with a 2.062" inner diameter designed specifically for 2" screw sizes, ensuring a secure and flush fit.
• Reliable Durability from a consistent 0.235-0.265" thickness, offering dependable performance and vibration resistance.
• Global Compliance Assurance meeting RoHS 3 and REACH standards, making it suitable for regulated international supply chains.
• Versatile Inch-System Sizing for seamless integration with existing North American machinery and fastener systems.

Professional Applications & Engineering Value

This heavy-duty square washer is engineered to solve critical challenges in structural and machinery applications. The black-oxide steel construction provides a robust barrier against rust and corrosion, which is vital for equipment exposed to moisture, chemicals, or outdoor elements. Its large 4" width and substantial thickness significantly increase the bearing surface, effectively distributing clamp load and preventing joint failure in high-vibration environments like heavy machinery, construction frameworks, and large-scale assembly. The precise 2.062" ID ensures optimal alignment with 2" screws, reducing installation errors and improving the integrity of the bolted connection. This makes it an indispensable component for engineers seeking to enhance the longevity and reliability of their designs.

Specification Summary & Compliance

This square washer conforms to inch system measurements with an inner diameter of 2.062", a width of 4", and a thickness range of 0.235-0.265". The material is black-oxide steel with a specified hardness of Rockwell 15N80. It is manufactured to be compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead in steel and is REACH (EC 1907/2006) compliant as of January 17, 2023, affirming its adherence to stringent environmental and safety regulations for industrial use.