Confused about the threading of your bolts? How about the naming conventions surrounding bolts and screws? Let us help clear it all up! In this video we explain Threads per Inch (TPI), Thread Pitch, and how both are measured and notated in fastener sizes.

In short, Thread Count, also known as TPI (Threads Per Inch), is a form of measurement exclusive to American bolts, screws, and fasteners. Thread Count is as simple as it sounds: the number of threads per inch measured along the length of the fastener.

Thread Pitch, on the other hand, is for Metric fasteners and defines the distance between threads expressed in millimeters along the length of the fastener.

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