The Female Connector in aluminium compressed air piping is a pipe connector featuring threads on the inner wall of the pipe. The design of this type of fitting allows for a tight connection between pipes and tubes by means of a rotational and threaded fit. Female Connector is usually used to connect components such as pipe sleeves and crosses, and its connection structure is simple and easy to operate with small size. However, due to the relatively small force area of female threads, their upper pressure limit is generally low, making them suitable for low or medium pressure piping systems. In practice, when installing the Female Connector, care needs to be taken to keep the pipeline clean and ensure that the threaded portion is free from impurities or damage, so as to ensure the sealing and stability of the connection. At the same time, it is also necessary to properly control the rotational strength in the connection process to avoid over-tightening resulting in damage or leakage of the joint.