S-90895A205 0.209" ID x 0.354" OD Heavy-Vibration-Resistant Spring Lock Washers for Socket Head Screws

Key Features & Benefits at a Glance

• Superior vibration resistance through spring steel construction and dual-action design, preventing fastener loosening in high-stress environments.
• Enhanced grip and anti-rotation performance with serrations on both top and bottom surfaces, ensuring secure fastening on uneven or smooth materials.
• Durable, corrosion-resistant protection from zinc plating, extending service life in industrial and outdoor applications.
• Reliable hardness and spring-back properties with a Rockwell C38 rating, maintaining clamping force under repeated load cycles.
• Broad compatibility with both No. 10 (inch) and M5 (metric) screw sizes, simplifying inventory for mixed-system assemblies.
• Consistent dimensional accuracy with precise 0.354" OD and 0.209" ID, ensuring proper fit and function in designated applications.
• Environmental and regulatory compliance meeting RoHS 3 and REACH standards, safe for use in regulated industries.

Professional Applications & Engineering Value

This spring lock washer is engineered to solve critical loosening issues in machinery, automotive, and electrical enclosures where vibration and dynamic loads are prevalent. The zinc-plated steel construction provides a cost-effective barrier against corrosion, while the top and bottom serration bites into both the fastener and workpiece, distributing load evenly and resisting rotational slip. Its Rockwell C38 hardness ensures the washer retains its spring tension and does not deform under pressure, offering long-term reliability. Compatible with both No. 10 and M5 screw sizes, it supports global manufacturing standards, reducing the need for multiple washer types and streamlining assembly processes in industrial applications.

Specification Summary & Compliance

This washer features an ID of 0.209", OD of 0.354", thickness of 0.024", and overall height of 0.043", manufactured to standard dimensional tolerances for consistent performance. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free of restricted substances and safe for industrial use. The material and construction adhere to common industry specifications for spring lock washers used in vibration-prone assemblies.