S-90895A223 0.291" ID x 0.472" OD Heavy-Vibration-Resistant Spring Lock Washers for Socket Head Screws
Heavy-Vibration-Resistant Spring Lock Washers for Socket Head Screws
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Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
Special Type Parameters
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Key Features & Benefits at a Glance
- Superior vibration resistance with dual-sided serrations 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
- Optimized mechanical performance with Rockwell C38 hardness providing excellent spring-back action and durability
- Precision dimensional fit with 0.291" ID specifically engineered for M7 screws, ensuring proper installation and load distribution
- Enhanced locking security through top and bottom serrations that create multiple friction points for reliable fastening
- Compliance with international standards including RoHS 3 and REACH, making them suitable for global supply chains
- Reduced maintenance requirements due to stainless steel's inherent resistance to rust and degradation
Professional Applications & Engineering Value
This M7 metric spring lock washer addresses critical vibration-induced failure points in industrial assemblies. The 18-8 stainless steel composition provides excellent corrosion resistance while maintaining mechanical properties under stress. Dual top and bottom serrations create superior bite compared to single-sided alternatives, effectively resisting rotational forces in high-vibration environments such as automotive subsystems, machinery, and electrical enclosures. The Rockwell C38 hardness ensures consistent spring tension and recovery after compression, maintaining clamping force through thermal cycles and dynamic loading. These metric lock washers deliver reliable performance in applications where safety and longevity are paramount, from manufacturing equipment to transportation systems.
Specification Summary & Compliance
Precision-engineered with 0.291" inner diameter for M7 screw compatibility and 0.472" outer diameter for optimal load distribution. Manufactured to metric standards with dual serrations on both top and bottom surfaces for maximum locking effectiveness. Constructed from 18-8 stainless steel with Rockwell C38 hardness specification. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial applications worldwide.
