What is the main difference between half-thread carriage bolts and full-thread carriage bolts?

The main difference between half-thread carriage bolts and full-thread carriage bolts lies in the design of the thread and the use scenario.
Half-thread carriage bolt: The thread of this bolt only covers a part of the screw, that is, only a part of the tooth gap. This design makes the bolt more flexible when connecting parts with irregular surfaces and can adapt to different shapes of connection surfaces. It is often used to connect parts with irregular surfaces or large gaps. They are widely used in mechanical engineering, forging processes, casting processes and other fields.
Full-thread carriage bolt: The thread of this bolt covers the entire screw and has a complete tooth gap. Its thread height is consistent and the spacing is equidistant. It is suitable for connecting parts with flat surfaces and can provide a tighter and more reliable connection. It is often used in mechanical connection fields that require high reliability, such as automobile manufacturing, railway vehicles, etc. Specific application examples
Standard and specifications

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