S-91755A321 0.331" ID x 0.512" OD Self-Retaining Washers
Self-Retaining Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Temperature & Environment Parameters
Installation & Application Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior vibration resistance with self-retaining design that prevents loosening under dynamic loads
- Excellent temperature performance maintaining structural integrity from -40°F to 180°F in harsh environments
- Dual-system compatibility with both 5/16" and M8 screw sizes for versatile inch/metric applications
- Consistent dimensional precision with 0.331" ID and 0.512" OD ensuring reliable fit and installation
- Durable nylon construction with Rockwell R120 hardness providing long-lasting wear resistance
- Environmental compliance meeting RoHS 3 standards for safe, regulated industrial use
- Corrosion-free performance with off-white nylon material eliminating rust concerns in various conditions
Professional Applications & Engineering Value
This nylon self-retaining washer delivers critical engineering solutions where traditional metal washers fail. The plastic washer construction eliminates galvanic corrosion while providing excellent electrical insulation properties. Engineered for industrial applications requiring reliable vibration resistance, the self-retaining feature ensures maintained positioning during assembly and operation. The temperature resistant nylon material performs consistently across extreme thermal cycles from -40°F to 180°F, making it ideal for automotive, electronics, and outdoor equipment where thermal expansion and contraction challenge fastener integrity. The dual compatibility with both 5/16" and M8 screw systems simplifies inventory management for operations using mixed measurement standards.
Specification Summary & Compliance
Precision-engineered with dimensional accuracy featuring 0.331" inner diameter and 0.512" outer diameter with thickness maintained between 0.104-0.116". Manufactured from off-white nylon plastic with Rockwell R120 hardness rating. Compliant with RoHS 3 (2015/863/EU) environmental standards, ensuring restriction of hazardous substances. Suitable for continuous operation within the specified temperature range of -40°F to 180°F while maintaining mechanical properties and performance characteristics.
