S-91755A162 0.69" ID x 1.125" OD Self-Retaining Washers

Key Features & Benefits at a Glance

• Secure Vibration Resistance - Self-retaining design prevents loosening under dynamic loads, maintaining assembly integrity in high-vibration applications
• Excellent Chemical & Corrosion Resistance - Nylon plastic construction withstands exposure to oils, solvents, and harsh industrial environments without degradation
• Wide Temperature Compatibility - Performs reliably across extreme conditions from -40°F to 180°F, suitable for both indoor and outdoor applications
• Precision Fit for 1/2" Fasteners - 0.69" ID ensures optimal engagement with standard 1/2" screws, reducing installation time and improving alignment
• Durable Wear Resistance - Rockwell R120 hardness provides excellent surface durability and long service life under repeated loading
• Regulatory Compliance Assurance - RoHS 3 (2015/863/EU) compliant for use in regulated industries and international markets
• Non-Conductive & Non-Magnetic Properties - Ideal for electrical applications where insulation and EMI protection are critical requirements

Professional Applications & Engineering Value

This nylon plastic self-retaining washer delivers exceptional engineering value by solving critical industrial challenges. The self-retaining feature eliminates the need for additional locking mechanisms, reducing assembly time and preventing costly fastener failures in vibration-prone applications such as automotive assemblies, machinery, and electrical enclosures. Made from high-grade nylon material with Rockwell R120 hardness, it provides superior resistance to abrasion and chemical exposure while maintaining dimensional stability. The precise 0.69" ID ensures perfect fitment with 1/2" screw sizes, while the 1.125" OD distributes load effectively across surfaces. With operational capability from -40°F to 180°F, this washer performs reliably in extreme temperature environments where metal washers would fail due to thermal expansion or conductivity issues.

Specification Summary & Compliance

This self-retaining washer features precise inch system dimensions with 0.69" internal diameter, 1.125" outer diameter, and 0.052-0.072" thickness range, engineered for optimal performance with 1/2" screw applications. Manufactured to exacting standards with Rockwell R120 hardness for consistent quality and durability. The product is fully RoHS 3 (2015/863/EU) compliant, meeting international environmental regulations for hazardous substance restrictions. Temperature performance is certified for continuous operation from -40°F to 180°F, ensuring reliability across diverse industrial environments and applications.