S-90895A216 0.787" ID x 1.181" 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 serrations that bite into mating surfaces, preventing loosening under dynamic loads
• Enhanced corrosion protection with zinc-plated steel construction, extending service life in demanding industrial environments
• Dual-system compatibility designed for both 3/4" (inch) and M19 (metric) screw sizes, providing installation flexibility
• Exceptional durability with Rockwell C38 hardness rating, maintaining structural integrity under high-stress applications
• Reliable performance with precise dimensional control (0.787" ID, 1.181" OD) ensuring proper fit and consistent clamping force
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe use in global markets
• Optimized spring action with 0.098" overall height providing consistent tension and compensation for material relaxation

Professional Applications & Engineering Value

This spring lock washer delivers critical engineering solutions for vibration-prone assemblies where fastener security is paramount. The zinc-plated steel construction provides essential corrosion resistance in industrial environments, while the dual serration design (top and bottom) creates multiple biting surfaces that significantly enhance grip and prevent rotational loosening. Engineered for both 3/4" and M19 screw applications, this washer accommodates international standards, making it ideal for heavy machinery, automotive assemblies, and structural frameworks where vibration resistance is critical. The combination of Rockwell C38 hardness and precise dimensional tolerances ensures reliable performance in high-torque applications, reducing maintenance frequency and preventing equipment downtime.

Specification Summary & Compliance

This spring lock washer features precise dimensional specifications including 0.787" internal diameter, 1.181" outer diameter, and 0.055" thickness with dual serration on both top and bottom surfaces. Manufactured from zinc-plated steel with Rockwell C38 hardness, the component is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for international industrial applications. The washer is engineered to provide reliable locking performance for both inch (3/4") and metric (M19) fastener systems.