Metric thread, also known as the metric screw thread, is an internationally recognized standard for threads. Its core feature is that the pitch and diameter are measured in millimeters (mm). The following are its key characteristics and applications:
Thread profile and angle: It adopts an equilateral triangular thread profile with a thread angle of 60°. The thread crest is flat, and the thread root is designed as an arc to enhance strength.
Parameter representation:
Pitch: It is directly marked in millimeters (mm), for example, in M10×1.5, "1.5" indicates a pitch of 1.5mm.
