S-91074A325 0.84" ID x 1.21" OD Extreme-Vibration-Resistant Wedge Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance ensures reliable performance in high-stress environments, reducing maintenance needs and downtime.
• Dual-sided serrations (top and bottom) provide enhanced locking grip, preventing loosening under dynamic loads and vibrations.
• Zinc-flake-coated steel construction offers excellent corrosion resistance, extending service life in harsh industrial conditions.
• High Rockwell C46 hardness delivers exceptional durability and wear resistance, maintaining integrity under repeated stress.
• Precise M20 metric sizing (0.84" ID x 1.21" OD) ensures easy installation and compatibility with standard fastener systems.
• RoHS 3 and REACH compliance guarantees environmental safety and regulatory adherence for global supply chains.
• Consistent thickness control (0.120-0.140") provides uniform load distribution, enhancing joint stability.

Professional Applications & Engineering Value

This M20 wedge lock washer is engineered to address critical challenges in industrial settings where vibration-induced fastener failure is a common issue. The zinc-flake-coated steel material provides robust protection against corrosion, making it ideal for outdoor machinery, automotive assemblies, and construction equipment exposed to moisture and chemicals. The dual-sided serrations create a powerful locking mechanism by biting into both the bolt and surface, effectively resisting rotational forces and shock loads. This design is particularly valuable in heavy-duty applications such as engine mounts, structural frameworks, and conveyor systems, where maintaining clamp load is essential for safety and operational continuity. By combining high Rockwell C46 hardness with precise metric dimensions, this washer delivers long-term reliability, reducing the need for frequent retightening and minimizing equipment failures in demanding environments.

Specification Summary & Compliance

This washer meets precise dimensional standards with an inner diameter of 0.84", outer diameter of 1.21", and thickness ranging from 0.120" to 0.140", designed for M20 screw sizes in metric systems. It adheres to industry-accepted manufacturing tolerances for consistent performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for use in regulated markets. The zinc-flake coating and steel material provide reliable mechanical properties, supporting applications that require high strength and environmental resistance.