本标准提供了用于M系列公制螺纹的量规的基本规格和尺寸，并涵盖了表1和表2中列出的螺纹量规和测量设备的规格和尺寸。还描述了每个量规的基本用途和用途。为便于参考，公制表格的常规转换已作为附录D的一部分纳入。附录A至D包含有用的非强制性信息，这些信息是对本标准要求章节的补充。

This Standard provides essential specifications and dimensions for the gages used on M series metric screw threads, and covers the specifications and dimensions for the thread gages and measuring equipment listed in Tables 1 and 2. The basic purpose and use of each gage are also described. For easy reference, customary conversion of metric tables has been incorporated as part of Appendix D. Appendices A through D contain useful nonmandatory information that is supplementary to the required Sections of this Standard.