介绍了常见的用于紧固联接英寸制螺纹和用于管道连接英寸制螺纹的牙形、配合和标识，以及管螺纹的密封特点。
The tooth shape, fit and mark of clamping connection and pipe connection inch threads commonly used are introduced and their seal features.
特别适用于中空管状螺纹加工，如油管接头、自行车、汽机车零件、散热管、牙管等滚牙加工。
Especially for tubular thread processing, such as pipe fittings, bicycle, motorcycle parts, heat pipes, tubes and other dental rolling processing.
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