Priority indicators of our civilization are systems: water supply, air conditioning, gas, hydraulic. Despite their unattractive shape, these are complex multicomponent systems. People working in the technical fields know how significant the small elements that are used to join two parts are - a union nut, a coupling or a fitting. Without these parts, it would be impossible to create aggregates, or cars, or conduct communication systems in homes.
The nut has a simple design
The simplest in its design and manufacture is the nut, which is used for axial and radial mounting. So what is a flare nut and how did it deserve its celebrity? The main function of the union nut is connecting, it is performed by winding, soldering or sealing. This is a ring or hollow rod with knurled threads in the inner cavity, and the outer part can be of different types, but they all have edges for gripping by the tool.
Made according to GOST
All types of nuts are made strictly in accordance with GOST, that is, all ratios of sizes have been worked out,manufacturing material. Such products fully meet all the requirements for testing, strength characteristics and correspond to their intended purpose. Modern union nuts are very functional: new materials are used for manufacturing, new shapes are given, alloying elements are used in alloys. Nuts with a protective function have already appeared, which can be used on very critical parts or systems.
The union nut can have two types of surface: cylindrical shape with perforated or smooth surface and petal. The most common and well-known shape is hexagonal.
As a connecting element, the flare nut is subjected to stress, which can cause distortion, displacement, leading to the destruction of the system. To reduce this factor, the length of the union nut can be equal to a maximum of 1.5-2.5 of its diameter. Union nuts for soldering have a smooth extension of a smaller diameter that is attached to the main body.
A bit of technology
Despite the simple geometric shape, the manufacture of nuts is a complex technological process that is divided into several stages and includes a combination of mechanical and thermal effects. The material or alloy from which the union nut is made complements the design capabilities, having properties such as corrosion resistance, softness, hardness, resistance to aggressive media, resistance to temperature extremes, as well as cold brittleness and red brittleness thresholds. Such diversityproperties can be achieved using different grades of steel and alloys, which, in turn, require different temperature conditions and processing. Nut steels: stainless steel, alloy steel, carbon steel. Alloys on the basis of which nuts with special properties are made are copper, brass, bronze, titanium, aluminum.
Destination
Due to its properties, the union nut is convenient for connecting in hard-to-reach and fixed parts. It is used for attaching thin-walled parts and withstands pressure from 0.9 to 18 bar. For installation and dismantling, you need a minimum of tools - just a key of a suitable number. All kinds of nuts have a long service life, most of them are corrosion resistant.
