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Measuring NH (National Hose) and NST (National Standard) ThreadingsNH threads are commonly used in firefighting equipment due to their reliability and durability. Here’s how to measure NH threadings effectively: Thread Pitch: Use a thread pitch gauge or ruler to measure the distance between the crests (high points) of adjacent threads. NH threads typically have a standard pitch depending on their nominal size.Thread Diameter: Measure the outside diameter (OD) of the male thread and the inside d …