S-91755A318 0.252" ID x 0.709" OD Self-Retaining Washers

Key Features & Benefits at a Glance

• Secure self-retaining design prevents loosening and misalignment during vibration or movement, reducing assembly time and maintenance needs
• Excellent temperature resistance from -40°F to 180°F ensures reliable performance in both extreme cold and high-heat industrial environments
• Superior Rockwell R120 hardness provides exceptional durability and wear resistance for long-lasting service in demanding applications
• Inherent corrosion resistance and electrical insulation of nylon plastic protects components and prevents galvanic corrosion in electrical systems
• Dual-standard compatibility with both 1/4" and M6 screw sizes offers flexibility for global equipment and metric/inch fastener systems
• RoHS 3 compliance guarantees environmental safety and meets international regulatory standards for hazardous substances
• Precision dimensions (0.252" ID, 0.709" OD) ensure perfect fit and consistent performance in automated or manual assembly processes

Professional Applications & Engineering Value

This nylon self-retaining washer delivers critical engineering solutions where traditional metal washers fail. The off-white nylon plastic construction provides excellent electrical insulation properties, making it ideal for electrical enclosures, control panels, and automotive electronics where short-circuit prevention is essential. Its corrosion-resistant nature eliminates galvanic corrosion concerns when used with dissimilar metals, particularly in harsh environments like marine applications, food processing equipment, and outdoor machinery. The self-retaining feature solves common assembly challenges by maintaining position during installation, significantly reducing production time in automated manufacturing lines while ensuring consistent placement in hard-to-reach areas. The broad temperature range from -40°F to 180°F makes it suitable for applications ranging from freezer equipment to engine compartments, providing reliable performance where thermal cycling would compromise ordinary materials.

Specification Summary & Compliance

This washer features precise dimensional specifications with 0.252" ID and 0.709" OD designed for 1/4" and M6 screw applications in both inch and metric systems. The nylon material maintains Rockwell R120 hardness throughout its operational range. Manufactured to consistent thickness tolerances between 0.073-0.085" for reliable performance. The product is RoHS 3 (2015/863/EU) compliant, meeting current environmental regulations for hazardous substance restrictions.