Uploaded February 2025 | Updated September 2026, 1 week ago

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Brian Silvestri, Metrology Sales Engineer at OptiPro, performs a quick dimension check on the Starrett HDV 400 by generated a line on both sides of the thread. Brian set the lines to be at the least material condition – that way the lines were placed at the bottom (root) of the threads. Then he took a distance between the 2 lines to get the root diameter. @starrett_tools