TPI stands for "Threads Per Inch." It is a measurement commonly used to indicate the number of threads or spirals present per linear inch on a threaded screw, bolt, or other threaded fastener. TPI is an essential specification for determining the compatibility and fit of threaded components.
In practical terms, TPI determines the pitch or distance between adjacent threads. A higher TPI translates to a finer thread pitch, meaning the threads are closer together. Conversely, a lower TPI indicates a coarser thread pitch, with larger gaps between threads. The TPI value directly influences the ease and speed of screw insertion or removal.
TPI is a critical parameter in applications where tight tolerances and precise threading are required, such as in manufacturing, automotive, construction, and engineering industries. It affects the functionality, strength, and durability of threaded connections. Choosing the appropriate TPI ensures proper engagement, load-bearing capacity, and resistance to loosening or stripping.
TPI is usually expressed as a whole number, such as 10 TPI or 24 TPI, but it can also be specified using fractions or decimals for finer resolutions. The TPI value depends on factors like the material, thread type (e.g., metric or imperial), and the specific requirements of the application at hand.
In summary, TPI refers to the number of threads per inch on a threaded fastener and plays a crucial role in determining the compatibility, strength, and effectiveness of threaded connections.
