This standard gives the designation, diameter-pitch series and main dimensions of the is metric triangular thread. It applies to single and multiple threads. In the first case it is sufficient to consider the values given for the pitch as those of the helical pitch and in the second case, as those of the profile pitch.
NBN E 03-003-1984 history
1984NBN E 03-003-1984 ISO metric triangular thread. Overview and main dimensions