LOOSE PREVENTION APPARATUS OF BOLT AND NUT

摘要

PURPOSE: A loose prevention device for a bolt and a nut is provided to prevent bolt and nut from being loosed by permanently preventing bolt and nut from being loosed. CONSTITUTION: A loose prevention device for a bolt and a nut comprise an axis hole(13), an operating hole(14), a loose prevention pin(40), a recess(22) and a ratchet saw blade(23). The axis hole is formed at the inner center of a male screw(11). The loose prevention pin is installed to move on the axis hole in order to receive the elasticity of a spring. The recess is formed on the inside of the nut and contains the front end of the loose prevention pin. The ratchet saw blade is formed inside the recess to contact the front end of the loose prevention pin.