How do you calculate threads per mm?
How do you calculate threads per mm? If you need to know the threads per inch of a metric fastener, first convert pitch from millimeters to inches (multiply by 0.03937), then divide 1 by that number. Or, use the table below……Table 1. Pitch (mm) Pitch (inches) Threads per Inch 1.0 0.0394 25.40 1.25 0.0492 20.32 […]