My memory does not hold this as i used to refer to a small pocket book that all toolmakers uses to carry it was called a ZEUS CHART. This held formulaes for most machining calculations.
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The proper thread notation for a 40 mm screw with a 14 mm thread and a 1.5 mm pitch would be M14x1.5. In this notation, "M" indicates a metric thread, "14" represents the nominal diameter of the screw in millimeters, and "1.5" signifies the pitch of the thread in millimeters. This notation is commonly used in engineering and manufacturing to specify the thread details of screws and bolts.
a roofing square is 100 sf. There are formulas out there that allow you to use the pitch and outer dimensions of the roof to figure out the number of squares. If not, calculate the square footage and divide by 100 - that's the number of squares you have...
It means that there is .5mm from a particular spot on one thread to the corresponding spot on the next thread
The site below that explains the pitch - how to measure it with a calculator to use with pitch and calculate the total footage of your roof
7200 Meters square