S-91755A126 0.156" ID x 0.25" OD Self-Retaining Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with self-retaining design that prevents loosening in dynamic applications
• Excellent chemical resistance against oils, solvents, and many industrial chemicals for extended service life
• Reliable electrical insulation properties that prevent current leakage and short circuits in electrical assemblies
• Wide temperature tolerance from -40°F to 180°F (-40°C to 82°C) for stable performance in extreme environments
• Durable nylon construction with Rockwell R120 hardness that maintains dimensional stability under load
• Dual compatibility with both No. 4 (inch) and M3 (metric) screw sizes for versatile application across systems
• Environmental compliance with RoHS 3 standards, ensuring safe use in regulated industries

Professional Applications & Engineering Value

This nylon plastic self-retaining washer delivers critical engineering solutions where traditional metal washers fall short. The self-retaining feature eliminates the need for additional locking mechanisms, reducing assembly time and preventing costly re-tightening in vibration-prone equipment. The nylon material provides inherent corrosion resistance, making it ideal for harsh chemical environments where metal components would degrade. Its excellent electrical insulation properties protect sensitive electronic components from short circuits, while the wide temperature range ensures reliable performance in both freezing outdoor applications and heated industrial settings. The dual compatibility with No. 4 and M3 screw sizes offers design flexibility across inch and metric systems, streamlining inventory management for manufacturers working with international standards.

Specification Summary & Compliance

This washer features precision dimensions of 0.156" ID and 0.25" OD with thickness ranging from 0.040" to 0.060", ensuring consistent fit and performance. Manufactured from nylon plastic with Rockwell R120 hardness for optimal durability, it maintains dimensional stability across its specified temperature range of -40°F to 180°F. The product is fully RoHS 3 (2015/863/EU) compliant and designed to meet industry standards for both inch (No. 4) and metric (M3) fastener systems, providing reliable performance in demanding industrial applications.