请注意。附录和勘误表不得包含在本标准的翻译版本中。本标准规定了石油和天然气工业用带肩旋转接头的以下要求:螺纹和螺纹量规的尺寸要求、计量规程和量规规范的规定，以及螺纹接头检验的仪器和方法。这些连接主要用于钻柱组件。相关方可就特殊公差要求、鉴定、测试、检验和精加工商定其他补充规范。本标准既适用于新制造的连接件，也适用于维修后重复使用的连接件。应该意识到，recut连接需要进行额外的检查和测试——有关此类信息，请参考API 7G-2。本标准适用于以下首选旋转肩连接设计。 这些都可以追溯到国际支持的量规和校准系统，可以描述为数字（NC）式、常规（REG）式或全孔（FH）式。

Please note. Addenda and errata may not be included in translated editions of this standard.This standard specifies the following requirements on rotary shouldered connections for use in petroleum and natural gas industries: dimensional requirements on threads and thread gauges, stipulations on gauging practice and gauge specifications, as well as instruments and methods for inspection of thread connections. These connections are intended primarily for use in drill-string components.Other supplementary specifications can be agreed between interested parties for special tolerance requirements, qualification, testing, inspection, and finishing. This standard applies both to newly manufactured connections and connections that are recut after service. It should be realized that recut connections are subject to additional inspection and testing--the user is referred to API 7G-2 for such information.This standard is applicable to the following preferred rotary shouldered connection designs. These are traceable to an internationally supported system of gauges and calibration that can be described as number (NC) style, regular (REG) style, or full-hole (FH) style.