Multifunctional nut

Abstract

The multifunctional nut comprises a head part, a screw rod part and a convex navel part which are integrally formed in sequence, wherein the head part is provided with an upper counter bore, and the upper counter bore is a polygonal counter bore; the lower end surface of the head part is also convexly provided with a sealing convex part; the screw rod part is provided with an internal thread hole and is also provided with an external thread; a sinking hole is formed in the convex navel part; the peripheral wall of the lower sinking hole is bent inwards, and a gasket mounting groove is formed in the lower sinking hole, so that the sealing gasket is tightly pressed in the gasket mounting groove; or the peripheral wall of the sunken hole is bent outwards to form a buckling part outside the sunken hole so as to buckle the metal plate. The multifunctional nut can bear large tightening force, is not prone to being damaged by screwing and is easy to machine. The self-tapping screw is good in self-tapping capacity, labor-saving and good in sealing and waterproof performance, a nylon gasket can be embedded, riveting can be carried out, and the fastening capacity is improved.

Description

technical field [0001] The invention belongs to the technical field of fastener manufacturing, and in particular relates to a multifunctional nut for automobiles. Background technique [0002] Fasteners are a type of mechanical parts that are used for fastening connections and are widely used. All kinds of fasteners can be seen on various machinery, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, meters and supplies. [0003] A self-tapping screw is a threaded fastener that taps and drills a matching internal thread in a prefabricated hole of a metal or non-metal material. Generally, it means that the external thread is self-tapping, which plays the role of self-tapping, and does not need to be used with nuts. It is mostly used for the connection between thin metal plates (steel plates, saw boards, etc.). [0004] At present, most of the self-tapping fasteners on the market are screws, and the sealing performance is poor; the top ...

AI Technical Summary

Problems solved by technology

[0004] At present, most of the self-tapping fasteners on the market are screws, and the sealing performance is poor; the top is a cross groove or a slot, and the position requirements are high when processing the groove, which is difficult to process, and the cross groove is difficult to withstand large tightening force, and the groove is easy to screw. Bad; this type of fastener has a single function and narrow application areas

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