Technical content and structural features of special grade screws foot screws

　　Special ScrewsTechnical content and structural features of foot screws

The structure of the super-grade screw foot screw mainly includes the bottom plate, the bolt rod and the nut matching the bolt rod thread. The bottom plate and the bolt rod are connected as a whole through a round screw seat and a round rod, and the nut is composed of a cover plate and a cap.

The cover plate is a circular plate, and the surface layer at the bottom of the plate has a circular groove and protrudes from the surface layer of the bottom plate. The center of the cover plate is a round hole, which has the same diameter as the center hole of the hexagonal head on the upper part of the cover plate, and is connected with the round hole of the round cover plate and the round hole of the hexagonal head.

The base plate of the special-grade screw foot screw is a flat base plate. The shape of the bottom plate is determined according to the actual requirements of various products and product accessories. The entire part of this special anchor screw is made of steel. The bolt rod is located above the round screw seat and the round rod, and the round rod is located above the round screw seat; the center of the end face of the bolt rod is provided with a hexagon socket. The diameter and rod length of the whole bolt (including round screw seat, round rod and hexagonal hole in the center of bolt end face), the size and depth of hexagonal hole in the center of bolt end face, and whether hexagonal hole is set shall also be determined according to the actual requirements of products and product accessories. Generally, it is only limited to large, medium and small special foot screws, depending on the length, diameter and product accessories of special foot screws actually required by the product.

The nut is an independent metal component, the nut includes a cap plate and a cap head, and the cap plate and the cap head are integrated metal components; the nut cover plate is a round plate, the center of the cover plate is a round hole, and the bottom of the cover plate is round concave sandalwood and Convex layer wire, the center hole of the cover plate is a wire hole, which is integrated with the wire hole in the center hole of the nut hexagon cap head. The shape and thickness of the nut cap plate and cap head should also be determined according to the actual requirements of the product and product accessories combined with the diameter of the bolt rod.

The nut is composed of a cap plate and a cap head as a whole, which can be loosened along the bolt shank. The cover plate is a circular silk hole cover plate, the bottom layer of the plate is cast with silk patterns, and the structure of the cover head is the outer hexagon of the garden silk hole.

This kind of super-grade screw foot screw installation sets the product as the whole of the connection between the flat-bottomed clamping foot screw of the preset hole and the nut plate solid. It is due to the type of screw that the base plate bolt and nut of the base plate and the cap are separated. The original bottom screw, bolt, nut, and cap head are respectively changed to form a strong and powerful stable connection, which not only cannot be damaged, but also has a strong seismic and compressive effect, and increase the service life.

Special grade screw foot screw model specifications. It should be determined according to the size of the special foot screw hole reserved for the product and its accessories and the actual needs of each product and its accessories. In use, special foot screw holes are reserved through products and product accessories to produce models, specifications and dimensions, and reserved holes for product accessories. The special bolts for products and accessories that meet the actual requirements are installed in the reserved aperture, and then the caps and gaskets of the same model and size are used for matching installation. After installation, the nuts are re-tightened to make the products and product components firmly connected with the special screws. Therefore, the model and size of the special foot screws are selected according to large, medium and small categories. When using the special special grade screw foot screw of this new type, gaskets with different structures and properties can be used. The gaskets are round rubber foils, and the quality meets the requirements of national regulations.