How are threads on bolts sized?

The sizing of threads on bolts is typically specified by measuring the diameter and the number of threads per inch. The diameter indicates the thickness of the bolt, while the threads per inch (TPI) informs how many threads are present along that length. This combination allows for a clear standardization in bolt sizing, ensuring compatibility with nuts and other threaded components.

This method of sizing is essential for applications where precise fastening is required, such as in aerospace and mechanical engineering, where the integrity of a connection can be critical.

An understanding of this sizing convention is important for selecting the right hardware for construction and repair tasks, as it ensures that the components will fit together securely and function as intended.