S-90481A221 0.188" ID x 1" OD Oversized Washers

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with black-oxide steel finish, extending service life in harsh industrial environments
• Precise dimensional accuracy with 0.188" inner diameter and 1" outer diameter, ensuring reliable fit and uniform load distribution
• Optimized compatibility with No. 8 screw sizes, reducing assembly time and preventing fastener loosening
• Durable steel construction providing consistent performance under mechanical stress and vibration
• Compliance with RoHS 3 and REACH standards, ensuring safe use in regulated industries and global markets
• Versatile thickness range (0.036-0.065") for flexible application in various gap and tension requirements
• Cost-effective solution for high-volume B2B procurement, minimizing maintenance and replacement costs

Professional Applications & Engineering Value

This black-oxide steel flat washer is engineered to address common industrial challenges such as corrosion-induced failure and imprecise fastener alignment. The black-oxide surface treatment forms a protective layer that significantly reduces oxidation, making it ideal for outdoor machinery, automotive assemblies, and electrical enclosures exposed to moisture. With its precise 0.188" ID and 1" OD dimensions, it ensures a snug fit on No. 8 screws, distributing clamp load evenly to prevent joint fatigue and surface damage. Its robust steel material withstands repeated stress cycles, offering long-term reliability in industrial washers applications where vibration resistance and dimensional stability are critical for operational safety and efficiency.

Specification Summary & Compliance

This flat washer adheres to standard inch measurement tolerances, with an inner diameter of 0.188", outer diameter of 1", and thickness ranging from 0.036" to 0.065". It is designed for use with No. 8 screw sizes and is manufactured from black-oxide steel for consistent performance. The product fully complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety standards for industrial and mechanical applications.