Anti -theft bolt

The utility model relates to an anti -theft bolt. Including spiral shell headrest piece, nut washer and elastic component, what spiral shell headrest piece and spiral shell head all were equipped withmutual interlock each other on two terminal surfaces of laminating and on nut washer and nut two terminal surfaces of laminating each other prevents moving back the line, be equipped with " T " shapeannular groove on the right -hand member face of spiral shell head and the left end face of nut, elastic component includes the dead lever, the fixed head, spring and transfer ball, all be equipped with two foretell dead levers on spiral shell headrest piece and nut washer's the outer lane at least, the fixed head is fixed and is served at one of dead lever, transfer ball sets up on the fixed head side that deviates from mutually with the dead lever, the fixed head stretches into the interior card of " T " shape annular groove and establishes in " T " shape annular groove. This anti -theft bolt makes anti -theft bolt