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前言国家标准总局已于一九八一年三月以(1981)081号文件批准发布了新的国家标准《普通螺纹》,并规定自一九八三年一月一日起开始实施。《普通螺纹》是一项保证螺纹零件具有良好互换性的基础标准,也是机械工业中广泛使用的一项重要标准。因此,国标螺纹的修订和重新发布,无疑将对我部螺纹的选用和生产会有很大的影响。为了帮助大家更好的学习和了解新标准的内容,便于在今后贯彻新标准过程中正确掌握和使用,这里就新国家标准普通螺纹及其在制订过程中的一些情况作比较详细的介绍,并对其中某些主要问题作一定的说明;和分析。
Introduction The National Bureau of Standards and General Administration of China approved the issuance of the new national standard “normal thread” with the approval of (1981) 081 in March 1981 and stipulated that it should come into effect on January 1, 1983. “Normal Thread” is a basic standard for ensuring good interchangeability of threaded parts and is an important standard widely used in the machinery industry. Therefore, the revision and re-issue of the national standard thread will undoubtedly have a great influence on the selection and production of the thread of our department. In order to help you to better understand and understand the content of the new standards so as to facilitate the correct understanding and use of the new standards in the future, we will introduce the new national standards of ordinary threads and some of the details in the process of their formulation. In addition, Some of these major issues for some explanation; and analysis.