ISO 68-2:2023 ISO一般用途螺纹 基本和设计牙型 第2部分：英制螺纹

标准编号：ISO 68-2:2023

中文名称：ISO一般用途螺纹 基本和设计牙型 第2部分：英制螺纹

英文名称：ISO general purpose screw threads — Basic and design profiles — Part 2: Inch screw threads

发布日期：2023-10

标准范围

本文件规定了ISO英制螺纹（UN和UNR）的基本轮廓和设计轮廓。UN适用于内螺纹和外螺纹。UNR仅适用于外部线程。由于螺纹加工，为UN螺纹指定了平坦或圆形根部轮廓，而为UNR外螺纹仅指定了已定义的圆形根部轮廓。本文件适用于英制紧固螺纹。

This document specifies the basic and design profiles for ISO inch screw threads (UN and UNR).

UN applies to both internal and external threads. UNR only applies to external threads. A flat or rounded root contour, due to the threading process, is specified for UN threads, while only a defined rounded root contour is specified for UNR external threads.

This document is applicable to the inch fastening screw threads.

标准预览图