S-90474A159 1.06" ID x 1.75" OD ASME Washers

Key Features & Benefits at a Glance

• Superior Load Distribution - The 1.75" outer diameter provides a wide bearing surface, effectively spreading the load to prevent surface damage and joint loosening under high stress.
• Precision Fit for 1" Screws - A 1.06" inner diameter ensures an accurate and secure fit on standard 1" fasteners, minimizing misalignment and simplifying installation.
• Enhanced Durability & Wear Resistance - With a Rockwell B80 hardness, this washer offers excellent resistance to deformation and wear, maintaining its integrity in demanding applications.
• Robust Material Integrity - Manufactured from high-quality steel, it delivers reliable strength and long-term performance in industrial environments.
• Consistent Dimensional Stability - A controlled thickness range of 0.124" to 0.145" ensures uniform performance and predictable compression in assembled joints.
• Environmental & Regulatory Compliance - Meets RoHS 3 and REACH standards, ensuring safety for use in regulated industries and global markets.
• Versatile Inch System Compatibility - Designed for the imperial measurement system, it seamlessly integrates with existing North American machinery and component inventories.

Professional Applications & Engineering Value

This steel flat washer is engineered to solve critical challenges in heavy machinery, structural steelwork, and industrial assembly. Its Rockwell B80 hardness provides the necessary toughness to resist embedding and surface indentation, a common failure point in soft materials under bolt preload. The precise 1.06" ID and 1.75" OD dimensions ensure optimal load distribution, which is vital for preventing stress concentration on connected surfaces and mitigating fatigue failure in vibrating equipment. By utilizing a flat washer with these specifications, engineers can enhance the reliability of bolted connections in construction, automotive sub-assemblies, and manufacturing fixtures, leading to reduced maintenance cycles and increased operational safety.

Specification Summary & Compliance

This flat washer conforms to standard inch system dimensional tolerances for general-purpose applications. Key specifications include an Inner Diameter (ID) of 1.06", Outer Diameter (OD) of 1.75", and a Thickness range of 0.124" to 0.145", designed for use with a 1" screw size. The product is manufactured from steel and heat-treated to a Rockwell B80 hardness. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, affirming its adherence to strict environmental and safety standards for industrial components.