标准摘要
[中文适用范围]： 本文件规定了符合ISO 2902标准的ISO公制梯形螺纹（Tr）的公称直径、中径和小径的尺寸极限，其基本型和设计型符合ISO 2901标准。本文件适用于ISO 2903标准中推荐的七种公差等级（7H、8H、9H、7e、8e、8c和9c）的公制梯形螺纹。 [外文原描述]： This document specifies the limits of sizes for major, pitch and minor diameters of ISO metric trapezoidal screw threads (Tr) conforming to ISO 2902 and having basic and design profiles in accordance with ISO 2901. This document is applicable to the metric trapezoidal screw threads with the seven tolerance classes (7H, 8H, 9H, 7e, 8e, 8c and 9c) recommended in ISO 2903.
英文名称ISO metric trapezoidal screw threads — Tolerances — Part 2: Limits of sizes