🔍 Key Concepts

• Pitch vs. threads per inch (TPI) in screw thread terminology • Relationship between distance along the axis and the spacing of threads • Difference between angles (thread angle, taper angle) and linear measurements on a screw

💭 Think About

• Ask yourself: When machinists talk about "pitch" of a thread, are they usually referring to a distance between threads, or a count of threads? • Look at which choices describe a linear distance along the screw axis versus an angle or a ratio. Which best fits standard usage of "pitch"? • Compare the options that involve angles: which specific thread feature do those angles normally describe if not pitch?

✅ Before You Answer

• Identify which option describes a distance between adjacent threads measured parallel to the screw axis. • Separate out the choices that describe angles; pitch is not an angle. • Be sure not to confuse pitch with threads per inch (TPI) or "number of threads over a length"—those are related but not the same definition.