规定了具有ISO基本轮廓的三角形螺纹的单头平行公制螺纹的要求，包括直径为1 mm到355 mm（含）的尺寸范围。提供粗节距系列、细节距系列和恒定节距系列，后者用于粗节距系列或细节距系列不适用的应用。提供有关螺纹参数、公差、偏差、螺纹等级、名称和符号的信息。附录中给出了列表值的依据、计算未增白螺纹尺寸极限的指南（带示例）以及螺纹生产的注意事项。

Specifies requirements for single start parallel metric screw threads having the ISO basic profile for triangular screw threads, covering the size range from 1 mm diameter to 355 mm diameter inclusive. Provides for a coarse pitch series, a fine pitch series and a constant pitch series, the latter intended for use in applications for which either the coarse or fine pitch series are unsuitable. Gives information on screw thread parameters, tolerances, deviations, thread classes, designation and symbols. Appendices are included giving the basis of the tabulated values, guidelines (with examples) for calculating the limits of size of untabulated screw threads and notes on the production of screw threads.