S-91755A129 0.198" ID x 0.328" OD Self-Retaining Washers

Key Features & Benefits at a Glance

• Secure vibration-resistant locking with self-retaining design that maintains position during assembly and operation
• Excellent temperature stability across a wide range from -40°F to 180°F for reliable performance in varying environments
• Durable nylon construction with Rockwell R120 hardness provides long-lasting wear resistance and corrosion protection
• Dual compatibility with both No. 6 (inch) and M3.5 (metric) screw sizes for versatile application across systems
• Precision dimensional control with 0.328" OD and 0.198" ID ensures proper fit and consistent performance
• Environmental compliance with RoHS 3 standards for safe use in regulated industries
• Electrical insulation properties of nylon material prevents galvanic corrosion and electrical shorts

Professional Applications & Engineering Value

This nylon plastic self-retaining washer delivers critical engineering solutions where thermal stability and secure fastening are paramount. The high-temperature resistance from -40°F to 180°F makes it ideal for automotive, electronics, and outdoor equipment applications experiencing thermal cycling. The self-retaining feature eliminates washer displacement during high-vibration operations in machinery and assembly lines, reducing maintenance downtime. As a non-conductive, non-corrosive component, it prevents galvanic reactions between dissimilar metals in electrical enclosures and marine environments. The dual No. 6 and M3.5 screw compatibility provides flexibility for global equipment manufacturing and repair operations requiring both inch and metric fastening systems.

Specification Summary & Compliance

This washer features precise dimensions of 0.328" OD, 0.198" ID, and thickness ranging 0.052-0.072" with Rockwell R120 hardness for consistent performance. Manufactured to industry standards for both inch (No. 6) and metric (M3.5) screw systems, it maintains dimensional stability across the specified temperature range. The product is fully compliant with RoHS 3 (2015/863/EU) regulations, ensuring environmental safety and regulatory acceptance for international industrial applications.