The hexagonal flange  nut for nuclear power water sluice gate mainly solves the problem that the nut used in the existing water sluice gate is an ordinary nut. After the sluice gate works for a long time, the nut is easy to loosen and fall off from the bolt, thereby causing a safety accident. , and the nut is easy to wear and rust after a period of use, thereby reducing technical problems such as service life. The utility model comprises a hexagonal nut body, which is characterized in that the interior of the hexagonal nut body is provided with a through hole, one end of the hexagonal nut body is provided with a flange surface, and the outer end surface edge of the flange surface is provided with flower teeth. The hexagonal flange surface nut with spherical cap comprises a hexagonal flange surface nut, and a hemispherical spherical cap is connected above the hexagonal flange surface nut. Compared with ordinary nuts, the hexagonal flange face nuts with ball caps are strong and firm, have good sealing performance, beautiful appearance, waterproof, dustproof, anti-collision, and anti-rust functions, and can be widely used in railways, wharfs, airports, chemical industries, etc. In special fields, it can reduce hidden dangers and be more safe and beautiful.

The hexagonal flange nut mainly includes a nut body, a flange surface is fixed at one end of the nut body, and a cap is fixed at the other end of the nut body; because the cap is set on the nut body, it has more advantages when using the hexagonal flange surface nut. Good sealing can effectively prevent rain, moisture, dust and other harmful substances from immersing in the nut body, prevent the nut body from rusting, and greatly extend the service life of the hexagonal flange nut. The size is basically the same as the thread specification, but compared with the hexagonal nut, it is an integrated gasket and nut, and there are anti-slip tooth patterns on the bottom, which increases the surface area contact between the nut and the workpiece, compared with ordinary nuts. The combination of adding a washer is more firm and has a greater tensile force.

Generally, the specifications of common flange nuts are generally below M20. Because most of the flange nuts are used on pipes and flanges, they are limited by the workpiece, and the specifications of flange nuts are smaller than those of nuts. Some flange nuts above M20 are mostly flat flanges, that is, there is no tooth pattern on the flange surface. Most of these nuts are used in some special equipment and special places, and the general sales manufacturers do not have stock.