本标准确立了MJ螺纹形状的基本三角形轮廓；提供一个命名系统；列出了直径为1.6至200 mm的标准系列直径/节距组合；并规定了限制尺寸和公差。它规定了MJ公制系列螺纹的特性，外螺纹根部的最小半径为0.15011P，外螺纹和内螺纹的小直径增加到ASME B1以上。13M公制螺纹:M型螺纹形状，以适应外螺纹根部半径。

This Standard establishes the basic triangular profile for the MJ thread form; provides a system of designations; lists the standard series of diameter/pitch combinations for diameters from 1.6 to 200 mm; and specifies limiting dimensions and tolerances. It specifies the characteristics of the MJ metric series of threads having a minimum 0.15011P radius at the root of the external thread, and also having the minor diameter of the external and internal threads increased above the ASME B1.13M-Metric Screw Threads: M Profile thread form to accommodate the external thread root radius.