Metic thread identification chart

A screw thread in conformity with this International Standard is designated by the letter M followed by the values of the nominal diameter and of the pitch expressed in millimeters separated by the sign x.
Example : M 8 x 1.0 (Fine pitch 1.0)
The absence of the indication of pitch means that the coarse pitch is specified.
Example : M 8 (Coarse pitch 1.25).
Get detailed chart on http://www.brassnutbolt.com/din/technical/information/tech_thread_id_metric.html