S-91812A506 0.77" ID x 1.14" 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 and marine environments
• Enhanced durability and wear resistance from case hardening to Rockwell C51, extending service life in high-stress applications
• Precise M18 metric compatibility with 0.77" ID and 1.14" OD dimensions ensuring perfect fit for standard fastener systems
• Reliable locking performance through wedge-lock design that maintains clamp force under extreme vibration conditions
• Environmental compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries
• Optimized thickness range (0.120-0.140") providing consistent performance while accommodating manufacturing tolerances

Professional Applications & Engineering Value

This M18 metric wedge lock washer delivers critical vibration-resistant fastening solutions for demanding industrial applications. The 316 stainless steel construction provides superior corrosion resistance in chemical processing, marine, and food industry environments where moisture and corrosive agents are present. The top and bottom serrations create multiple biting points that dig into both the bolt head and workpiece surface, effectively resisting rotational forces that cause conventional washers to fail. The case hardened treatment to Rockwell C51 ensures the serrations maintain their sharpness through repeated use, while the wedge-lock mechanism creates a consistent opposing force that prevents backing off. This combination of material strength and mechanical design solves common maintenance issues in heavy machinery, transportation equipment, and structural assemblies where vibration-induced loosening compromises safety and operational integrity.

Specification Summary & Compliance

This metric wedge lock washer features precise dimensional specifications with 0.77" inner diameter, 1.14" outer diameter, and thickness ranging from 0.120" to 0.140" for M18 screw applications. Manufactured from 316 stainless steel with case hardening to Rockwell C51 hardness, the washer meets industry standards for locking performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and chemical substance restrictions are met for industrial use across global markets.