S-91755A138 0.277" ID x 0.453" OD Self-Retaining Washers

Key Features & Benefits at a Glance

• Secure self-retaining design prevents loosening under vibration, reducing maintenance needs and improving assembly reliability
• Excellent temperature resistance from -40°F to 180°F maintains performance in harsh industrial environments
• Rockwell R120 hardness provides durable wear resistance for extended service life in demanding applications
• Corrosion-resistant nylon construction eliminates rust concerns while offering lightweight advantages over metal alternatives
• Dual-standard compatibility fits both No. 10 (inch) and M5 (metric) screw sizes for versatile inventory management
• Precision dimensional control with 0.277" ID and 0.453" OD ensures consistent fit and optimal load distribution
• RoHS 3 compliance meets environmental regulations for global manufacturing and export requirements

Professional Applications & Engineering Value

This nylon self-retaining washer delivers exceptional engineering value in applications where vibration resistance, corrosion prevention, and thermal stability are critical. The self-retaining feature eliminates the need for additional locking mechanisms, streamlining assembly processes in automotive, electronics, and machinery sectors. Made from high-grade nylon plastic, this washer provides excellent electrical insulation properties while resisting chemicals and environmental degradation. The broad temperature range from -40°F to 180°F ensures reliable performance in both freezing outdoor conditions and heated industrial environments. Its compatibility with both No. 10 and M5 screw sizes makes it ideal for equipment manufacturers working with mixed measurement systems, reducing inventory complexity while maintaining assembly precision across diverse applications.

Specification Summary & Compliance

This self-retaining washer features precise dimensional specifications with 0.277" inner diameter, 0.453" outer diameter, and thickness ranging from 0.022" to 0.042". Manufactured from nylon plastic with Rockwell R120 hardness rating, it maintains dimensional stability across its operating range. The product is fully RoHS 3 (2015/863/EU) compliant and designed to meet industry standards for both inch (No. 10) and metric (M5) fastener systems. The material properties ensure consistent performance while meeting environmental regulations for restricted substances.