Judging from the pitch of 2.0, this thread may be metric thread, which can be marked as M 190X2. Because the thread diameter is not marked with reference dimensions. Among the main parameters of external thread, outer diameter, middle diameter, pitch and fit tolerance, you only have pitch, outer diameter and small diameter. The parameters are incomplete.

In addition, the minimum pitch of metric thread with outer diameter of 190 in relevant standards is 3 mm