S-91755A158 0.47" ID x 0.734" OD Self-Retaining Washers

Key Features & Benefits at a Glance

• Secure vibration-resistant locking with self-retaining design prevents loosening in high-vibration industrial environments
• Excellent temperature performance maintains structural integrity across extreme conditions from -40°F to 180°F
• Dual-standard compatibility works seamlessly with both 5/16" and M8 screw sizes for global application flexibility
• Superior chemical and corrosion resistance thanks to high-performance nylon plastic construction
• Consistent mechanical properties ensured by Rockwell R120 hardness rating for reliable long-term performance
• Precision dimensional control with 0.47" ID and 0.734" OD ensures perfect fit and optimal load distribution
• Environmental compliance assurance with RoHS 3 (2015/863/EU) certification for sustainable manufacturing

Professional Applications & Engineering Value

This nylon self-retaining washer delivers exceptional engineering value in demanding applications where temperature fluctuations and vibration present significant challenges. The nylon plastic construction provides excellent dielectric properties and corrosion resistance, making it ideal for electrical enclosures, automotive assemblies, and outdoor equipment. The self-retaining feature ensures secure positioning during assembly, reducing installation time and preventing misalignment in automated production lines. With compatibility for both 5/16" and M8 screw sizes, this washer offers versatile solutions for multinational projects requiring both inch and metric fastening systems. The broad temperature range from -40°F to 180°F makes it suitable for applications spanning from cryogenic environments to engine compartments, providing reliable performance where metal washers might fail due to thermal expansion or galvanic corrosion.

Specification Summary & Compliance

This precision-engineered washer features dimensional accuracy with 0.47" inner diameter and 0.734" outer diameter, specifically designed for 5/16" and M8 screw sizes. The component maintains Rockwell R120 hardness for consistent mechanical performance and operates reliably across an extensive temperature range of -40°F to 180°F. Manufactured from high-grade nylon plastic, this self-retaining washer complies with RoHS 3 (2015/863/EU) environmental standards, ensuring regulatory compliance for international industrial applications. The design incorporates standard-compliant dimensions suitable for both inch and metric fastening systems in various industrial settings.