Screw-lock wire thread insert is a new type of threaded fastener, which is a kind of concentric body of spring internal and external thread made of stainless steel wire with high precision diamond section. Screw-lock wire thread insert is to add one or several rings of locking rings on the basis of the ordinary type. Screw-lock wire thread insert is a new kind developed on the basis of the ordinary type wire thread insert. The middle part of the Screw-lock wire thread insert has 1 to 2 rings of pentagon or hexagon, when the bolt is screwed into the thread hole half, the bolt head meets the locking ring, then the wire thread insert applied by the tool is better than some other usual locking device locking performance, higher strength, but also can be removed repeatedly.