S-91755A141 0.277" ID x 0.5" OD Self-Retaining Washers

Key Features & Benefits at a Glance

• Superior vibration resistance due to the self-retaining design, ensuring secure positioning and preventing loosening in dynamic applications.
• Excellent thermal stability with a wide operating range from -40°F to 180°F, maintaining performance in extreme environments.
• High durability and wear resistance from the Rockwell R120 hardness rating, extending service life in demanding industrial settings.
• Broad compatibility with both No. 10 and M5 screw sizes, supporting inch and metric systems for versatile assembly use.
• Reliable material integrity using nylon plastic, which offers corrosion resistance and lightweight properties for easier handling.
• Environmental and regulatory compliance with RoHS 3 standards, ensuring safe use in various industries without hazardous substances.
• Precise dimensional fit with an ID of 0.277" and OD of 0.5", facilitating easy installation and reducing assembly errors.

Professional Applications & Engineering Value

This nylon self-retaining washer is engineered to address common industrial challenges such as vibration-induced fastener failure and thermal expansion issues. Made from high-grade nylon plastic, it provides inherent corrosion resistance and electrical insulation, making it ideal for electrical enclosures, automotive assemblies, and machinery where metal alternatives may cause galvanic corrosion or add unnecessary weight. The self-retaining feature ensures the washer stays in place during installation, speeding up production lines and reducing rework. Its ability to withstand temperatures from -40°F to 180°F ensures reliable performance in both freezing and moderately high-heat environments, preventing brittleness or deformation. By integrating this washer, engineers can enhance assembly reliability, minimize maintenance, and comply with RoHS 3 environmental standards, supporting sustainable manufacturing practices.

Specification Summary & Compliance

This washer features precise dimensions with an inner diameter of 0.277" and outer diameter of 0.5", designed for No. 10 and M5 screw sizes to accommodate both inch and metric systems. It maintains consistent performance across a thickness range of 0.052-0.072" and is manufactured from nylon plastic with a Rockwell R120 hardness for durability. The product complies with RoHS 3 (2015/863/EU) regulations, ensuring it is free from restricted hazardous substances, and is suitable for applications requiring reliable thermal resistance and dimensional stability.