S-91812A427 0.21" ID x 0.43" OD Extreme-Vibration-Resistant Wedge Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through dual-sided serrations that bite into mating surfaces, preventing loosening under dynamic loads
• Exceptional corrosion resistance with 316 stainless steel construction, ideal for harsh industrial environments and chemical exposure
• Enhanced durability and wear resistance from case hardening to Rockwell C51, maintaining locking performance through repeated use
• Dual-standard compatibility with both No. 10 (inch) and M5 (metric) screw sizes, simplifying inventory for global operations
• Reliable locking performance with wedge-action design that creates constant tension, eliminating the need for additional locking devices
• Environmental compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries
• Precision dimensional control with consistent 0.21" ID and 0.43" OD specifications ensuring proper fit and function

Professional Applications & Engineering Value

Our 316 stainless steel wedge lock washers deliver critical vibration resistance in demanding applications where fastener security is paramount. The top and bottom serration pattern creates multiple biting points that mechanically lock the assembly, solving the common industrial problem of joint failure due to vibration-induced loosening. The case hardened surface maintains serration sharpness through installation cycles, while the 316 stainless steel material provides excellent corrosion resistance for marine, chemical processing, and outdoor applications. These wedge lock washers are engineered to maintain clamp load in heavy machinery, transportation equipment, and structural assemblies where safety and reliability cannot be compromised. The dual-standard design accommodates both No. 10 and M5 fasteners, making them versatile for multinational projects and maintenance operations.

Specification Summary & Compliance

This wedge lock washer features precise dimensional specifications with 0.21" inner diameter, 0.43" outer diameter, and thickness ranging from 0.080" to 0.100". The component is manufactured to exacting standards with case hardening achieving Rockwell C51 hardness for optimal performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial applications worldwide. Designed for use with both inch (No. 10) and metric (M5) fastener systems, these washers provide reliable locking performance across diverse engineering specifications.