HOTLINE:0983 344 163
0941 636 369
An external tooth lock washer, also known as an external star washer or external serrated washer, is a type of washer used in various mechanical and fastening applications to prevent nuts, bolts, or screws from loosening due to vibrations or other external forces.
It has a distinct design characterized by serrated or toothed edges on one side of the washer.
Other names: external tooth washer, external star washer, external serrated washer
The structure of an external tooth lock washer is relatively simple, but its design is crucial for its function in preventing fasteners from loosening due to vibrations or other external forces. Here are the key structural features of an external tooth lock washer:
The serrated edges on one side of the washer are the critical feature that distinguishes an external tooth lock washer from other types of washers. These serrations dig into the surface material and create resistance to rotation, helping to prevent the nut or bolt from loosening over time.
When assembling a fastener with an external tooth lock washer, the serrated side should be placed against the surface material (e.g., metal, wood), and the smooth side should face the nut or bolt head. As you tighten the fastener, the serrations grip the material and resist any tendency for the fastener to rotate backward, thus providing a locking effect that helps maintain a secure connection.
Here’s how an external tooth lock washer works:
External tooth lock washers are commonly used in industries like automotive, construction, machinery, and manufacturing, where maintaining secure and stable connections is crucial to safety and performance.
It’s essential to choose the right size and type of washer for your specific application to ensure effective fastener locking and prevent unintended loosening.
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