S-91812A724 0.84" ID x 1.21" OD Extreme-Vibration-Resistant Wedge Lock Washers
Extreme-Vibration-Resistant Wedge Lock Washers
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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, preventing loosening under extreme dynamic loads
- Exceptional corrosion resistance thanks to 316 stainless steel construction, ideal for harsh chemical and marine environments
- Enhanced durability and wear resistance from case hardening to Rockwell C51, extending service life in high-stress applications
- Reliable locking performance with precise M20 metric sizing (0.84" ID, 1.21" OD) ensuring perfect fit and consistent clamping force
- Compliance with stringent environmental regulations including RoHS 3 and REACH, making it suitable for global industrial supply chains
- Optimized for heavy-duty applications with controlled thickness (0.110-0.130") providing uniform load distribution and reduced fatigue failure
Professional Applications & Engineering Value
This M20 wedge lock washer delivers critical engineering solutions where vibration-induced fastener failure is a major concern. The 316 stainless steel material provides outstanding resistance to pitting and crevice corrosion, making it perfect for offshore equipment, chemical processing plants, and food machinery. The top and bottom serrated design creates multiple locking points that maintain tension under cyclic loading, eliminating the need for additional locking mechanisms. Case hardened to Rockwell C51, it withstands high surface pressures without deforming, ensuring long-term reliability in heavy-duty industrial applications such as construction machinery, transportation systems, and power generation equipment where safety and maintenance reduction are paramount.
Specification Summary & Compliance
This metric wedge lock washer features precise dimensions (0.84" ID, 1.21" OD, 0.110-0.130" thickness) designed for M20 screw sizes. Manufactured to exacting standards with case hardened treatment achieving Rockwell C51 hardness for superior wear resistance. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and unrestricted use in international industrial markets.
