ISO Metric Fasteners: Understanding Fastener Pitch

What is the definition and measurement of fastener's pitch in ISO Metric fasteners?

How is the pitch of a fastener in ISO Metric fasteners defined and measured?

Final answer:

In ISO Metric fastening systems, the pitch of a fastener represents the distance from one thread to the adjacent thread, being the number of threads per inch. It is expressed in millimeters, with a smaller pitch number denoting closely packed threads (fine threads), and larger pitch numbers indicating threads further apart (coarse threads).

Explanation:

In ISO Metric fastening systems, the pitch of a fastener is defined as the distance from one thread to its adjacent thread. This measurement is expressed in millimeters. For instance, in a 1.0 pitch metric fastener, every thread is 1mm from the next thread. When threads are closer together (denoted by a smaller pitch number), they make fine threads while larger pitch numbers denote coarse threads which have threads further apart. Pitch essentially represents the number of threads per inch.