Home > categories > Hardware > Screws > Engineering argument, usually referred to as the M3 screw, M refers to what is the meaning? The Please instruct the engineering staff.

Question:

Engineering argument, usually referred to as the M3 screw, M refers to what is the meaning? The Please instruct the engineering staff.

Answer:

M is the large diameter of the screw, the diameter of the screw top of the bolt, or the diameter of the screw bottom of the nut

International Metric Thread System: The national standard CNS adopts the thread. The crest is flat and easy to be turned. The tooth bottom is rounded to increase the thread strength. The thread angle is 60 degrees. The specification is expressed by M Metric thread can be divided into two kinds of coarse and fine teeth, such as M8x1.25 (M: code: 8: nominal diameter .1.25: pitch).

M: ordinary thread;: screw that thread diameter (ie, the top of the thread) is 3mm, nuts that thread diameter