S-90377A142 0.172" ID x 0.5" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide 18-8 Stainless Steel construction, ideal for harsh industrial environments
• Enhanced durability and load distribution thanks to Rockwell B68 hardness, reducing surface damage and fastener loosening
• Precise fit for No. 8 screws with 0.172" inner diameter, ensuring secure and stable fastening
• Optimal surface coverage from 0.5" outer diameter, protecting materials from abrasion and stress
• Consistent performance with thickness ranging from 0.050" to 0.080", accommodating slight variations in assembly
• Compliance with environmental regulations including RoHS 3 and REACH, supporting sustainable and safe industrial practices
• Long-lasting reliability in inch measurement system, compatible with standard industrial equipment and specifications

Professional Applications & Engineering Value

These Black-Oxide 18-8 Stainless Steel flat washers are engineered to address common industrial challenges such as corrosion, wear, and fastener failure in demanding applications. The Black-Oxide surface treatment enhances corrosion resistance, making them suitable for outdoor, marine, or chemical-exposed environments where moisture and contaminants are prevalent. With a Rockwell B68 hardness, they provide excellent mechanical strength, distributing loads evenly to prevent surface indentation and maintain joint integrity in machinery, automotive, and construction assemblies. The precise No. 8 screw size compatibility and inch-based dimensions ensure easy integration into existing systems, reducing installation time and improving overall reliability. Ideal for industrial washers in heavy-duty settings, they help minimize maintenance costs and extend equipment lifespan by resisting degradation under stress and environmental factors.

Specification Summary & Compliance

This flat washer features an inner diameter of 0.172", outer diameter of 0.5", and thickness range of 0.050" to 0.080", designed for use with No. 8 screws in the inch measurement system. Manufactured from 18-8 Stainless Steel with a Black-Oxide finish, it meets standard industrial requirements for dimensional accuracy and performance. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and adheres to environmental safety standards for global industrial applications.