English to Spanish Tech/Engineering Mechanics / Mech Engineering tornillos

Loose-proof screw bolt
A loose-screw bolt is disclosed. The screw bolt comprises a pad, a bolt and a nut, wherein the pad is a flat surface and the flat surface is provided with at least a V-shaped slot arranged radially. The V-shaped slot includes a sloping face and a vertical wall, and the sloping face is along the tightening direction of the bolt. When the screw nut rotates counter-clockwise, the frictional force of the pad at the sloping face and the surface of a work piece will increase with respect to the anti-clockwise rotation of the screw nut.