S-90895A204 0.169" ID x 0.276" OD Heavy-Vibration-Resistant Spring Lock Washers for Socket Head Screws

Key Features & Benefits at a Glance

• Superior vibration resistance through spring steel construction that maintains constant tension under dynamic loads
• Enhanced locking performance with dual serration on both top and bottom surfaces for maximum grip and anti-loosening capability
• Exceptional durability with Rockwell C38 hardness rating ensuring long service life in demanding applications
• Reliable corrosion protection through zinc-plated steel construction for extended performance in various environments
• Universal compatibility with both No. 8 (inch) and M4 (metric) screw sizes for versatile application across systems
• Precise dimensional fit with 0.169" ID and 0.276" OD ensuring proper alignment and distribution of clamping forces
• Comprehensive regulatory compliance meeting RoHS 3 and REACH standards for global industrial use

Professional Applications & Engineering Value

This spring lock washer delivers critical vibration resistance in demanding industrial environments where mechanical fastening integrity is paramount. The zinc-plated steel construction provides essential corrosion protection while maintaining the spring tension required for persistent locking force. The innovative dual serration design on both top and bottom surfaces creates multiple biting edges that significantly enhance anti-rotation performance, effectively preventing fastener loosening under continuous vibration and thermal cycling. Engineered with Rockwell C38 hardness, this washer maintains its structural integrity and locking capability through repeated stress cycles. The compatibility with both No. 8 and M4 screw sizes makes it ideal for equipment requiring mixed fastening systems, from machinery manufacturing to automotive assemblies and electrical enclosures where reliable vibration management is critical.

Specification Summary & Compliance

This spring lock washer features precise dimensional specifications including 0.169" inner diameter, 0.276" outer diameter, 0.020" thickness, and 0.039" overall height. Manufactured from zinc-plated steel with Rockwell C38 hardness rating, the washer incorporates dual serration on both top and bottom surfaces for maximum locking effectiveness. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial applications worldwide.