Overview
The External Tooth Lock Washer for M4 fasteners is a precision-engineered component designed to solve the persistent problem of fastener loosening in high-vibration and dynamic load environments. This washer functions by creating a permanent, biting lock between the fastener head and the bearing surface, maintaining critical clamping force and joint integrity where standard flat washers fail.
Key Features
Engineered to prevent loosening from vibration and rotation External teeth bite into both the fastener and the mounting surface Manufactured from high-strength 65Mn carbon steel Heat-treated to a minimum 400 HV hardness for durability Zinc plated finish provides a protective barrier against corrosion Ideal for use with standard M4 screws and bolts
Specifications
System of Measurement: Metric Thread/Size Compatibility: M4
Material
Carbon Steel Material Grade: 65Mn Finish: Zinc Plated Hardness: 400 HV Minimum Type: External Tooth Lock Washer Pack Quantity: 100
Applications
These lock washers are essential for assemblies subject to constant motion or shock. They are commonly specified in automotive sub-assemblies, electric motor mounting, heavy machinery, conveyor systems, and industrial equipment where vibration is a constant factor. They are also suitable for use in outdoor or mildly corrosive environments where the zinc plating offers added protection. For optimal performance, ensure the bearing surfaces are clean, flat, and capable of accepting the bite of the washer's external teeth. Always use with the recommended torque specifications for the associated M4 fastener.
