Thread Pitch gauge is in the 1st set of the Smart Tools collection (screws, nuts, bolts, pipes).How did you gauge thread pitch of screws? Paper? Ruler? Now, you can search it easily with this app.Usage is simple: Open it and measure it on the screen. The width of your devices had been calibrated automatically.- US thread sizes- Metric thread sizes- NPT (National Pipe Tapered thread)- BSPT (British Standard Pipe Taper)* Do you want more tools?Get [Smart Ruler Pro] and [Smart Tools] package.For more information, see the manual, Youtube video and the blog. Thank you.** Special thanks to Bill Kreutinger at Fastenal for thread pitch gauge templates.