Stainless steel captive spring combined screw

The invention discloses a stainless steel captive spring combined screw. The screw comprises a bolt body. A spring fixing ring sleeves the bolt body, the outer surface of a spring mounting ring is provided with a protruding second thread, and a spring is arranged between the spring fixing ring and a bolt head. The spring mounting ring sleeves the spring fixing ring, the edge of the spring mountingring is rolled inwards to wrap the spring fixing ring, and the spring fixing ring and the spring mounting ring are rotatably connected. A groove is formed in the surface of an upper circular ring ofthe spring mounting ring, and a protruding block matched with the groove is arranged on the lower surface of the bolt head. The screw is easy and convenient to install, the structure of a plate is protected, the using function of the plate is guaranteed, and it can be guaranteed that the screw cannot be disengaged in the dismounting process with the help of the spring. 本发明公开了一种不锈钢松不脱弹簧组合螺丝，包括螺栓本体；螺栓本体上套有弹簧固定圈，弹簧安装圈的外表面具有凸出