S-91755A319 0.252" ID x 0.394" OD Self-Retaining Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through the self-retaining design, ensuring secure positioning and reduced maintenance in dynamic applications.
• Excellent durability with Rockwell R120 hardness, providing reliable performance and resistance to wear in demanding environments.
• Broad temperature tolerance from -40°F to 180°F, allowing consistent operation in varied thermal conditions without degradation.
• Chemical and corrosion resistance due to the nylon plastic construction, ideal for harsh industrial settings and extending service life.
• Dual-system compatibility with both 1/4" and M6 screw sizes, offering flexibility for inch and metric assemblies in global projects.
• Environmental compliance with RoHS 3 standards, ensuring safe, lead-free use and meeting regulatory requirements for electronics and machinery.
• Easy installation and stability from precise ID and OD dimensions, minimizing loosening and improving assembly efficiency.

Professional Applications & Engineering Value

This nylon self-retaining washer is engineered to address common industrial challenges such as component loosening due to vibration and thermal expansion. Made from high-grade nylon plastic, it offers inherent electrical insulation and resistance to oils, solvents, and moisture, making it ideal for electrical enclosures, automotive assemblies, and machinery frames. The self-retaining feature ensures the washer stays in place during installation, reducing assembly time and preventing misalignment in hard-to-reach areas. Its wide temperature range supports use in outdoor or variable climate conditions, while the off-white color allows for easy identification and aesthetic integration. By combining lightweight properties with robust performance, this washer minimizes weight without sacrificing strength, enhancing overall system reliability and reducing long-term maintenance costs.

Specification Summary & Compliance

This washer adheres to precise dimensional standards with an ID of 0.252", OD of 0.394", and thickness ranging from 0.104" to 0.116", ensuring consistent fit for 1/4" and M6 screws. It is manufactured from nylon plastic with a Rockwell R120 hardness for dependable mechanical performance. The product complies with RoHS 3 (2015/863/EU) regulations, confirming it is free from hazardous substances, and is suitable for applications requiring REACH alignment. Designed for reliable use across a temperature spectrum of -40°F to 180°F, it meets general industrial fastener specifications for vibration resistance and longevity.