S-90183A220 0.256" ID x 0.5" OD Washers for Blind Rivets

Key Features & Benefits at a Glance

• Superior corrosion protection with zinc-plated steel construction for extended service life in harsh environments
• Optimal load distribution across 0.5" outer diameter surface to prevent joint loosening and material damage
• Enhanced vibration resistance through precise 0.056-0.062" thickness for stable fastening performance
• Perfect fit for 1/4" rivets with 0.256" inner diameter ensuring secure installation and alignment
• Durable steel core material providing reliable mechanical strength for industrial applications
• Inch system compatibility for seamless integration with standard North American equipment and components
• Cost-effective maintenance solution by reducing wear and extending service intervals in mechanical assemblies

Professional Applications & Engineering Value

This zinc-plated steel flat washer delivers critical engineering solutions for industrial and construction applications where vibration resistance and corrosion protection are paramount. The precisely engineered dimensions (0.256" ID x 0.5" OD) create an ideal bearing surface for 1/4" rivet applications, distributing clamp load effectively to prevent joint failure and surface damage. The zinc plating provides sacrificial protection against environmental elements, making these flat washers suitable for outdoor equipment, structural assemblies, and machinery exposed to moisture. With consistent thickness tolerance between 0.056-0.062", these washers maintain uniform pressure distribution in high-vibration environments common in manufacturing facilities, construction sites, and heavy equipment applications.

Specification Summary & Compliance

Manufactured to standard inch system dimensions with 0.256" inner diameter and 0.5" outer diameter, this flat washer features a controlled thickness range of 0.056-0.062" for consistent performance. Constructed from zinc-plated steel for corrosion resistance, these washers are engineered for use with 1/4" rivet diameter applications. While hardness is not rated for specific grade classification, the components meet general industrial standards for flat washers and are suitable for commercial and industrial use where specific hardness ratings are not required.