S-91755A148 0.563" ID x 1.26" 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
• Exceptional temperature resistance from -40°F to 180°F ensures consistent performance in extreme industrial environments
• High Rockwell R120 hardness nylon construction provides excellent wear resistance and long service life
• Dual compatibility with both 3/8" and M10 screw sizes simplifies inventory management for mixed-standard operations
• Precision dimensional control (0.563" ID, 1.26" OD) ensures perfect fit and uniform load distribution
• RoHS 3 compliance meets strict environmental regulations for global manufacturing applications
• Non-conductive nylon material eliminates electrical conductivity risks in sensitive electronic assemblies

Professional Applications & Engineering Value

This nylon self-retaining washer delivers critical engineering solutions where thermal stability and vibration resistance are paramount. The Rockwell R120 hardness rating ensures the washer maintains structural integrity under repeated stress cycles, while the broad temperature range from -40°F to 180°F makes it ideal for automotive, outdoor equipment, and industrial machinery exposed to extreme conditions. The self-retaining feature addresses common assembly challenges by preventing washer displacement during installation and operation, significantly reducing downtime in high-vibration applications. Manufactured from premium nylon plastic, these washers provide excellent chemical resistance and electrical insulation properties, making them suitable for electrical enclosures, HVAC systems, and precision mechanical assemblies where metal washers would cause galvanic corrosion or short circuits.

Specification Summary & Compliance

This washer features precision dimensions of 0.563" ID and 1.26" OD with thickness ranging from 0.052" to 0.072", designed specifically for 3/8" and M10 screw applications. The manufacturing process ensures consistent dimensional accuracy suitable for industrial assembly requirements. The product is fully RoHS 3 (2015/863/EU) compliant and manufactured from high-grade nylon material with Rockwell R120 hardness rating, providing reliable performance across the specified temperature range of -40°F to 180°F. Available in both inch and metric system measurements to accommodate global engineering standards.