S-91755A128 0.156" ID x 0.265" OD Self-Retaining Washers

Key Features & Benefits at a Glance

• Superior vibration resistance ensures secure, long-lasting fastening in high-motion environments, reducing maintenance needs.
• Excellent temperature resilience from -40°F to 180°F maintains performance in varied thermal conditions without degradation.
• High Rockwell R120 hardness provides durable wear resistance, extending the washer's service life in demanding applications.
• Self-retaining design simplifies installation and prevents misalignment, speeding up assembly processes for No. 4 and M3 screws.
• RoHS 3 compliance guarantees environmental safety and meets global regulatory standards for hazardous substance restrictions.
• Dual inch/metric compatibility (No. 4 and M3) offers flexibility for diverse industrial systems, minimizing inventory complexity.
• Precision dimensions (0.156" ID, 0.265" OD) ensure consistent fit and reliable performance in tight-tolerance assemblies.

Professional Applications & Engineering Value

Engineered from nylon plastic, these self-retaining washers address common industrial challenges like component loosening due to vibration and thermal expansion. The material's inherent flexibility and Rockwell R120 hardness provide a robust barrier against wear, while the temperature resistance from -40°F to 180°F ensures stability in environments ranging from freezing outdoor equipment to heated machinery. Ideal for No. 4 and M3 screw applications in automotive, electronics, and machinery assemblies, these washers enhance reliability by maintaining consistent pressure and alignment. Their RoHS 3 compliant composition supports sustainable manufacturing, making them a smart choice for industrial washers that prioritize both performance and regulatory adherence.

Specification Summary & Compliance

This washer features precise dimensions with an ID of 0.156", OD of 0.265", and thickness range of 0.115-0.135", designed for standard No. 4 and M3 screw sizes. Manufactured to ensure reliable fit and function, it complies with RoHS 3 (2015/863/EU) regulations, confirming the absence of restricted hazardous substances. The nylon material and construction support consistent performance across specified temperature limits, adhering to industry expectations for plastic washers in technical applications.