S-90895A033 0.539" ID x 0.748" OD Heavy-Vibration-Resistant Spring Lock Washers for Socket Head Screws

Key Features & Benefits at a Glance

• Superior vibration resistance with dual-sided serrations (top and bottom) that bite into mating surfaces to prevent loosening under dynamic loads
• Exceptional corrosion resistance thanks to 18-8 stainless steel construction, ideal for harsh industrial environments
• Reliable hardness performance with Rockwell C38 rating ensuring consistent spring tension and long-term fastener integrity
• Dual-system compatibility designed for both 1/2" (inch) and M12 (metric) screw sizes, reducing inventory complexity
• Precise dimensional control with 0.539" ID and 0.748" OD ensuring perfect fit and optimal load distribution
• Environmental compliance assurance meeting RoHS 3 and REACH standards for global industrial applications
• Optimized height-to-thickness ratio (0.071" height, 0.043" thickness) providing ideal spring action while maintaining structural stability

Professional Applications & Engineering Value

This spring lock washer delivers critical engineering solutions for vibration-prone applications across multiple industries. The 18-8 stainless steel composition provides excellent corrosion resistance in chemical processing, marine, and food equipment environments where moisture and corrosive agents are present. The innovative top and bottom serration design creates multiple locking points that mechanically resist rotational forces, making it ideal for heavy machinery, automotive assemblies, and electrical enclosures subject to constant vibration. The dual compatibility with both 1/2" and M12 screw sizes offers flexibility for equipment manufacturers working with international standards. With its specific dimensional profile and Rockwell C38 hardness, this washer maintains consistent spring tension under thermal cycling and mechanical stress, preventing joint failure in critical bolted connections.

Specification Summary & Compliance

This spring lock washer features precise dimensions with 0.539" inner diameter and 0.748" outer diameter, manufactured from 18-8 stainless steel with Rockwell C38 hardness for optimal performance. The product is engineered to provide reliable locking action for both inch (1/2") and metric (M12) fastener systems. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring environmental responsibility and regulatory acceptance for industrial applications worldwide.