本文件的目的是提供标准，以适用于1/2、5/8、3/4、1、1/4、1/2、2、2 1/2、3、3 1/2和4 in.的正常尺寸，与家用、工业和一般用途软管直接连接的软管接头、阀门、喷嘴和所有其他配件的螺纹零件。与流动方向相关的正常连接顺序是从外螺纹接头到内螺纹接头。表1给出了基本尺寸，表2和表3给出了完整的详细尺寸和螺纹形式。

The purpose of this document is to provide standards for application to the threaded parts of hose couplings, valves, nozzles, and all other fittings used in direct connection with hose intended for domestic, industrial, and general service in normal sizes of 1/2, 5/8, 3/4, 1, 1 1/4, 1 1/2, 2, 2 1/2, 3, 3 1/2, and 4 in. The normal sequence of connections, in relation to the direction of flow, is from an externally threaded nipple into an internally threaded coupling. The basic dimensions are given in Table 1 while complete detailed dimensions and thread form are given in Tables 2 and 3.