S-90895A005 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 serration technology that bites into mating surfaces to prevent fastener loosening under dynamic loads
• Excellent corrosion resistance provided by 18-8 stainless steel construction, ensuring long-term reliability in harsh industrial environments
• Optimized dimensional precision with 0.126" ID and 0.217" OD for perfect compatibility with No. 5 and M3 screw sizes in both inch and metric systems
• Enhanced durability from Rockwell C38 hardness rating that maintains spring tension and prevents deformation under repeated loading cycles
• Universal application flexibility with dual measurement system compatibility, eliminating the need for separate inventory for inch and metric fastening requirements
• Reliable performance retention through precisely engineered 0.018" thickness and 0.035" overall height that maintains consistent spring action
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for use in regulated industries and international markets

Professional Applications & Engineering Value

This spring lock washer with dual serration technology addresses critical engineering challenges in industrial applications where vibration-induced fastener failure is a primary concern. The 18-8 stainless steel construction provides exceptional corrosion resistance for demanding environments including marine, chemical processing, and outdoor equipment. The unique top and bottom serration design creates multiple biting surfaces that significantly enhance grip and prevent rotational slippage, making it ideal for high-vibration machinery, automotive assemblies, and precision equipment requiring No. 5 and M3 screw compatibility. The combination of Rockwell C38 hardness and precise dimensional control ensures consistent spring performance that maintains clamping force through thermal cycling and mechanical stress, reducing maintenance frequency and improving overall assembly reliability.

Specification Summary & Compliance

This precision spring lock washer features exact dimensional specifications including 0.126" internal diameter, 0.217" outer diameter, 0.018" thickness, and 0.035" overall height. Manufactured to exacting standards for compatibility with both inch (No. 5) and metric (M3) screw systems. The washer maintains Rockwell C38 hardness for optimal spring performance and meets comprehensive regulatory requirements including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) compliance with current SVHC documentation as of January 17, 2023, ensuring suitability for global industrial applications and environmentally conscious manufacturing processes.