S-91755A136 0.235" ID x 0.328" OD Self-Retaining Washers

Key Features & Benefits at a Glance

• Secure self-retaining design ensures consistent positioning during assembly, reducing installation time and preventing misalignment in dynamic applications.
• Exceptional temperature resistance from -40°F to 180°F maintains structural integrity and performance in harsh thermal environments, ideal for outdoor or automotive use.
• High Rockwell R120 hardness provides excellent wear resistance and durability, extending service life under mechanical stress and vibration.
• Corrosion-resistant Nylon material eliminates rust concerns and offers reliable electrical insulation, enhancing safety in electrical assemblies.
• Dual inch/metric compatibility (No. 8 and M4 screw sizes) simplifies inventory management and supports global manufacturing standards.
• RoHS 3 compliance ensures environmental safety and regulatory adherence, making it suitable for eco-conscious industries.
• Precision dimensions (0.235" ID, 0.328" OD) guarantee accurate fit and consistent performance, minimizing assembly errors.

Professional Applications & Engineering Value

This Nylon self-retaining washer is engineered to address common industrial challenges such as component loosening, electrical short risks, and material degradation in variable climates. Its Rockwell R120 hardness and Nylon plastic construction provide superior resilience against abrasion and chemicals, while the self-retaining feature secures fasteners in high-vibration settings like automotive systems, machinery, and electronic enclosures. The broad temperature range from -40°F to 180°F ensures reliable operation in extreme conditions, from freezing outdoor installations to heated industrial equipment. By combining electrical insulation with corrosion resistance, it reduces maintenance needs and enhances safety in No. 8 and M4 screw applications, delivering long-term cost savings and operational efficiency.

Specification Summary & Compliance

This washer features precise dimensions with an ID of 0.235", OD of 0.328", and thickness ranging from 0.022" to 0.042", ensuring tight tolerances for secure fit. It conforms to standard inch and metric systems for screw sizes No. 8 and M4, and is manufactured from Nylon material with a Rockwell R120 hardness rating. The product is fully RoHS 3 (2015/863/EU) compliant, adhering to environmental regulations for hazardous substance restrictions, and operates effectively within a specified temperature range of -40°F to 180°F.