S-90895A202 0.126" ID x 0.217" OD Heavy-Vibration-Resistant Spring Lock Washers for Socket Head Screws

Key Features & Benefits at a Glance

• Superior vibration resistance through dual top and bottom serrations that maintain tight locking under dynamic loads
• Enhanced corrosion protection with zinc-plated steel construction for extended service life in harsh environments
• Precision dimensional compatibility with both No. 5 (inch) and M3 (metric) screw sizes for versatile application across systems
• Exceptional mechanical durability from Rockwell C38 hardness rating that prevents deformation under high stress
• Reliable performance consistency with 0.018" thickness and 0.035" height maintaining uniform pressure distribution
• Full regulatory compliance meeting RoHS 3 and REACH standards for global industrial use
• Optimized locking performance through spring design that compensates for thermal expansion and material relaxation

Professional Applications & Engineering Value

This spring lock washer delivers critical vibration-dampening performance for industrial assemblies where loosening under dynamic loads poses significant reliability risks. The zinc-plated steel construction provides essential corrosion resistance while maintaining the Rockwell C38 hardness required for high-stress applications. The innovative dual serration pattern on both top and bottom surfaces creates multiple biting edges that significantly enhance locking capability compared to standard single-serrated washers. Engineered for compatibility with both No. 5 and M3 screw sizes, this washer simplifies inventory management for facilities operating mixed measurement systems. The precise 0.126" ID and 0.217" OD dimensions ensure proper fitment while the spring design maintains constant tension, making it ideal for automotive, machinery, electrical enclosures, and heavy equipment applications where vibration-induced fastener failure is a primary concern.

Specification Summary & Compliance

This spring lock washer features precise dimensional specifications including 0.126" ID, 0.217" OD, 0.018" thickness, and 0.035" overall height. Manufactured from zinc-plated steel with Rockwell C38 hardness, it's designed for use with No. 5 (inch) and M3 (metric) screw sizes. The product maintains compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and unrestricted use in global markets. The dual serration configuration on both top and bottom surfaces provides enhanced locking performance for demanding industrial applications.