标准摘要
[中文适用范围]： 本文件规定了符合ISO 261标准的ISO通用公制螺纹（M）的大径、中径和小径尺寸限制，且其基本型和设计型符合ISO 68-1的规定。本文件适用于ISO 965-1中推荐的十种公差等级（4H、5H、6H、7H、6G、4h、6h、6g、6f和6e）的公制紧固螺纹。 [外文原描述]： This document specifies the limits of sizes for major, pitch and minor diameters of ISO general purpose metric screw threads (M) conforming to ISO 261 and having basic and design profiles in accordance with ISO 68-1. This document is applicable to the metric fastening screw threads with the ten tolerance classes (4H, 5H, 6H, 7H, 6G, 4h, 6h, 6g, 6f and 6e) recommended in ISO 965-1.
英文名称ISO general purpose metric screw threads — Tolerances — Part 6: Limits of sizes for internal and external threads (fine and medium tolerance qualities, first and second choices)