Gasket, bolt and nut combined unit special for granary door

The utility model discloses a special gasket, bolt and nut combination unit for a granary door, which comprises a nut, a screw I is arranged at the bottom end of the nut, a hexagon nut meshed with the screw I is sleeved on the screw I, and rotating rings movably connected with the hexagon nut and the nut are arranged on the sides, close to each other, of the hexagon nut and the nut. Corrugated pipes are arranged on the sides, close to each other, of the two rotating rings, and gaskets are arranged on the sides, close to each other, of the two corrugated pipes. The bolt has the beneficial effects that the rotating ring and the corrugated pipe made of the elastic steel are arranged, the two sets of gaskets are fixed to the hexagon nut and the nut correspondingly, the gaskets cannot rotate along with rotation of the hexagon nut and the nut, the corrugated pipe can slightly deform under high-strength extrusion, and therefore the tightness among the hexagon nut, the bolt and the gaskets is improved, and the servic