The brass quick plug connector adopts an innovative 4-start thread design with a pitch of 6mm, which can achieve a longer screw-on length with fewer turns. It only needs one turn to complete the length of 4 turns of conventional thread screwing. It uses the combination of internal and external threads, inserts the pin into the hole in the external threaded connector, and seals with an O-ring to ensure that the connection process is stable and firm. This design can withstand high pressure and is not easy to loosen. It is suitable for occasions requiring high stability and sealing. During use, the surface of the external nut is equipped with a plastic sleeve, which greatly improves the user's operating experience. The plastic sleeve of the nut feels good, making tightening and loosening smoother, and also has an anti-scalding effect, especially suitable for piping systems with hot water or high-temperature fluids.