M12x1.5 2a意思

"M12x1.5 2A" is a thread specification for a metric bolt or screw. Here's what each part of the designation means:

• M12: This is the nominal diameter of the bolt or screw in millimeters. In this case, the screw or bolt is 12mm in diameter.

• x1.5: This is the thread pitch, which is the distance between threads in millimeters. In this case, the thread pitch is 1.5mm.

• 2A: This is the thread tolerance class and thread form. The "2" indicates the tolerance class for the major diameter, and the "A" indicates the thread form. In this context, "2A" means that the thread has a normal tolerance class for the major diameter and is a standard right-hand thread.

So, "M12x1.5 2A" is a metric bolt or screw with a diameter of 12mm, a thread pitch of 1.5mm, and a standard right-hand thread with normal tolerance class for the major diameter.