Special-shaped nut with looseness prompting function

The utility model belongs to the technical field of nut installation, particularly relates to a special-shaped nut with a looseness prompting function, and provides the following scheme aiming at the problem that an operator does not prompt the situation that the nut is not tightened in the prior art: the special-shaped nut comprises a nut body, and a polygonal outer edge is arranged on the outer side of the nut body; a gasket is fixedly installed at the bottom of the nut body, an arc-shaped sealing cover is arranged at the top of the nut body, a threaded groove is formed in the bottom of the nut body, an indicator lamp for prompting screwing of the nut body is fixedly installed at the top of the arc-shaped sealing cover, and a power-on assembly for controlling power-on and power-off of the indicator lamp is arranged at the bottom of the nut body. The special-shaped nut body designed by the utility model has a loosening prompting function, so that an operator is reminded to tighten the special-shaped nut body