S-91812A664 0.79" ID x 1.21" 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 hardness, maintaining locking performance through repeated use
• Reliable fastener security with precise 3/4" screw size compatibility and wedge-lock design that increases clamping force under tension
• Optimized load distribution through substantial 1.21" OD and 0.79" ID dimensions, reducing surface stress and deformation
• Environmental compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries
• Consistent performance with inch system measurements ensuring proper fit and function in standard industrial applications

Professional Applications & Engineering Value

This 316 stainless steel wedge lock washer delivers critical vibration resistance in demanding applications where traditional fasteners fail. The top and bottom serration design creates multiple biting edges that dig into both the bolt head/nut and joint surface, creating mechanical interference that prevents rotational loosening. Engineered with case hardened treatment to Rockwell C51, the washer maintains its locking capability through extreme vibration cycles and heavy load conditions. The 316 stainless steel material provides superior corrosion resistance compared to standard grades, making it ideal for marine, chemical processing, and outdoor industrial equipment. With precise dimensional control for 3/4" screw size applications, this heavy-duty locking solution ensures long-term joint integrity in construction machinery, transportation systems, and manufacturing equipment where safety and reliability are paramount.

Specification Summary & Compliance

This wedge lock washer features inch system measurements with 0.79" ID, 1.21" OD, and 0.120-0.140" thickness range for precise fitment. The case hardened construction achieves Rockwell C51 hardness for maximum durability. Manufacturing complies with industry standards for wedge lock washers with dual-sided serration technology. Environmental compliance is verified through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) certifications, ensuring safe use across regulated industrial sectors.