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Thread pitch gauge
Also called: screw pitch gauge, thread gauge
A tool with toothed leaves that you hold against a thread to find its pitch (the spacing between threads). To know whether a nut fits, you also need the diameter and thread series.
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When you'd need this
- I don't know my bolt's thread pitch
- I want to check the spacing of the threads
Measure and check before you buy
- Metric or inch
- Range of pitches included
- Thread series and thread angle