The waterproof joint of the metal waterproof cable joint comprises a screw sleeve having an inner hole having a top external thread and a second external thread on the outer circumference of the screw sleeve, the outer thread of the top thread is threaded with a fastening nut, and the inner hole is provided with a waterproof sealing ring. The middle part of the hole has an inner shoulder, and the inner end of the waterproof sealing ring abuts against the inner shoulder. The inner hole is further provided with a pressing bushing, and the inner end of the pressing bushing is inserted in the outer circumference and the inner hole of the waterproof sealing ring. Between the hole walls, the outer annular end surface of the compression bushing is provided with a plurality of circular arc grooves, and the inner end surface of the annular shoulder of the outer end of the fastening nut has a plurality of inwardly convex convex points, and the fastening nut In the tightened state, the outer annular end surface of the compression bushing is in close contact with the inner end surface of the annular shoulder of the fastening nut, and the bump is located in the circular arc groove. The waterproof sealing ring exerts a counter-effect force on the pressing bushing, so that the circular arc groove in the pressing bushing locks the convex point on the fastening nut, thereby preventing the screw of the fastening nut from loosening due to the arrangement of the oscillation, thereby stopping Retreat effect.
The waterproof joint comprises a waterproof bolt and a waterproof nut. The waterproof bolt comprises a hollow external thread coupling, a boss disposed at the center of the external thread coupling, a clamping claw disposed at one end of the external thread coupling, and a lower end surface distance of the boss a plurality of top limit stop blocks are disposed, a plurality of claw portions are disposed at one end of the clamping claw away from the boss, and a gap is formed between the adjacent two claw portions, and the waterproof nut comprises a hollow and is provided with an internal thread. The body and the hat-shaped head extending downward from the lower end of the body, the end face of the body is disposed with a plurality of second limiting blocks, the inner wall of the cap-shaped head is provided with a plurality of stopping blocks, and the waterproof nut is screwed into the external thread connection The upper end surface of the waterproof nut body is in contact with the lower end surface of the waterproof bolt boss, and each of the top limit blocks is located between two adjacent second limit blocks, and each of the stop sliders is clamped into the clamping claws. In the vacancy between the adjacent claws, the waterproof nut can be prevented from slipping and retracting.