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引言 在不同国家制造的螺纹以及螺纹连接件,由于其牙型、尺寸规格等不同而不能通用,这影响着国际间经济、技术交流和设备的充分利用。近年来,通过推广度量标准,国际间统一螺纹标准的制定已取得了进展,但我国与美、英等国在螺纹标准方面仍存在着许多差别。本文着重介绍美、英、加三国通用的统一标准螺纹,即ABC标准螺纹,供各行业引进美、英等国机械设备的完好使用和维修以及我国普通螺纹标准的修订之
Introduction Threads and threaded connections made in different countries can not be used universally due to their tooth profile, size, etc. This affects the international economic, technological exchanges and the full utilization of equipment. In recent years, progress has been made in formulating the international unified thread standard by promoting the measurement standards. However, there are still many differences between China and the United States and Britain in terms of thread standards. This article focuses on the United States, Britain and Canada common universal standard thread, that is, ABC standard thread, for the introduction of the United States, Britain and other countries the perfect use of machinery and equipment and maintenance and revision of China’s general thread standards