COUPLING BOLT FOR PREVENTING NUT FROM BEING RELEASED FROM BOLT

摘要

PURPOSE: A coupling bolt is provided to prevent a nut from being released from the coupling bolt by coupling a retainer ring to an upper end of the coupling bolt. CONSTITUTION: A coupling bolt(100) includes a cylindrical bolt body(110) formed at an upper end thereof with a screw section(111). A nut(130) is screw-coupled with the screw section(111) of the cylindrical bolt body(110). A retainer ring(120) is coupled to an upper end of the bolt body(110) so as to prevent the nut(130) coupled to the screw section(111) from being released from the screw section(111). The retainer ring(120) is formed at one side thereof with a cutting portion(121) so that the retainer ring(120) is flexibly expanded and shrunk. An insertion slot(112) is formed at an upper end of the bolt body(110) so as to receive the retainer ring(120).