S-91812A468 0.42" ID x 0.83" OD Extreme-Vibration-Resistant Wedge Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with dual top and bottom serrations that bite into mating surfaces to prevent loosening under dynamic loads
• Exceptional corrosion resistance thanks to 316 stainless steel construction, ideal for harsh chemical and marine environments
• Enhanced durability and wear resistance through case hardening to Rockwell C51 hardness, extending service life in high-stress applications
• Reliable performance in metric systems with precise M10 screw size compatibility and metric dimensions (0.42" ID, 0.83" OD)
• Consistent clamping force maintenance with wedge lock design that compensates for relaxation and settlement in bolted joints
• Broad industrial compliance meeting RoHS 3 and REACH environmental standards for global manufacturing applications
• Optimized thickness range (0.070-0.090") providing ideal compression characteristics for various assembly requirements

Professional Applications & Engineering Value

This M10 wedge lock washer delivers critical vibration-resistant performance for demanding industrial applications where fastener security is paramount. Engineered from 316 stainless steel, it provides superior corrosion resistance in chemical processing, marine, and offshore environments where exposure to chlorides and harsh elements would compromise ordinary fasteners. The top and bottom serration design creates multiple biting edges that dig into both the bolt head/nut and base material, effectively resisting rotational loosening caused by machinery vibrations, thermal cycling, and dynamic loads. The case hardened treatment to Rockwell C51 ensures the serrations maintain their sharp bite through repeated installation cycles, preventing the galling and deformation that plagues softer lock washers. This combination of metric precision, material integrity, and mechanical locking action makes it an engineering solution for heavy equipment, transportation systems, and structural assemblies where vibration-induced failures carry significant safety and operational consequences.

Specification Summary & Compliance

This metric wedge lock washer features precise dimensions (ID: 0.42", OD: 0.83", Thickness: 0.070-0.090") compatible with M10 screw sizes. Manufactured from 316 stainless steel with case hardening to Rockwell C51 hardness, it maintains dimensional stability under load. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and unrestricted use in industrial applications worldwide.