S-91812A725 0.84" ID x 1.54" 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 fastening for M20 metric screws with precise 0.84" ID and 1.54" OD dimensions ensuring perfect fit and optimal load distribution
• Consistent performance under heavy loads with 0.120-0.140" thickness providing structural stability and uniform clamping force
• Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe use in regulated industries
• Versatile top and bottom serration design creating multiple locking points for maximum security in various assembly configurations

Professional Applications & Engineering Value

This M20 wedge lock washer delivers critical engineering solutions where vibration-induced loosening compromises assembly integrity. The 316 stainless steel construction provides superior corrosion resistance for marine, chemical processing, and outdoor applications where environmental factors degrade ordinary fasteners. The top and bottom serration design creates positive mechanical locking by embedding into both the bolt head and base material, effectively resisting rotational forces in heavy machinery, transportation equipment, and structural frameworks. Case hardening to Rockwell C51 ensures the serrations maintain their biting capability through multiple installation cycles, while the metric sizing guarantees compatibility with international equipment standards. This combination of material excellence and precision engineering addresses the fundamental challenge of maintaining vibration-resistant connections in demanding industrial environments.

Specification Summary & Compliance

This wedge lock washer features precise dimensional specifications with 0.84" inner diameter, 1.54" outer diameter, and 0.120-0.140" thickness range, engineered for M20 metric screw applications. Manufactured from case hardened 316 stainless steel achieving Rockwell C51 hardness for optimal performance. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial use across global markets.