can someone help me with a threading program for a m8 X1.25 and can I convert the code to standard to run on my cnc without switching to metric mode. I have fanuc ot controls and dont run much for metric.

One millimeter is 0.03937" so your conversion is simply 8 x 0.03937 to get the diameter in inches, and 1.25 x 0.3937 to get the pitch in inches.