Bronze nut

The bronze nut is a premium, high-quality fastener. Thanks to its alloy of copper, tin and other components, it has high strength, corrosion resistance and antifriction properties — that is, low adhesion and the ability to operate in a lubricated environment under friction and sliding. It is resistant to aggressive media, seawater, acids and solutions. Bronze nuts have a yellow color and are used in mechanical engineering, shipbuilding and industrial manufacturing. Depending on the conditions of use, bronze nuts can be substituted with: stainless steel nuts, polyamide nuts, brass nuts.

The quick-release nut is an item of industrial hardware. It is used in machine fixtures at auto service shops. Nuts with a diameter of M=36, M=40 mm are used for fast centering and securing of wheels in tire fitting. Such nuts consist of two parts joined by a spring. The parts are spread apart and fitted onto a threaded rod. The nut is tightened by a rotating motion without a wrench. This method of securing the part is reliable.

The hot-dip galvanized nut is used in heavy-duty operating conditions, providing a long service life for the product. Hot-dip zinc coating gives good anti-corrosion properties — corrosion progresses more slowly than with electro-galvanized products: the coating thickness with hot-dip galvanizing is 45–65 microns, compared with 5–20 microns for electro-galvanizing. Other advantages of hot-dip galvanized fasteners include: increased service life (more than 5 times longer), high resistance to coating damage, and self-healing of the coating.

The dielectric nut is made of polyamide and has insulating properties — it does not conduct electric current. It is non-magnetic, has a low coefficient of friction and good mechanical characteristics. Polyamide nuts are suitable for installing and assembling light structures. They retain their properties across temperature swings from -40 to +120 °C. Varieties of dielectric polyamide nuts include: DIN 439 low hexagon nut, DIN 934 hexagon nut, DIN 1587 cap nut.

The contact nut is made of brass or bronze. It is used for connecting busbars and wires, as well as for spark plugs (wing nut type) on older car models. It has high strength, corrosion resistance and antifriction properties, with high resistance to aggressive media, acids and solutions. It retains its properties when operated at temperatures below 0 °C. It provides a secure hold.

The wing nut is an item of industrial hardware. It comes with or without a hole in the wings (barashek). It is used mainly in shipbuilding. It is made of various grades of stainless steel. A diameter from M=5 to M=24 provides a reliable grip. The neck of the nut can be turned down to a diameter of M=20 mm. It has high strength and corrosion resistance. The thread can be coarse or fine pitch. It is edged with plastic. It complies with GOST 3032-76.

The clamping nut is made of steel, copper and brass. It is used to connect mixer taps to water supply pipes, cartridges, and angle grinders. It has high strength, anti-corrosion properties, and high resistance to aggressive media, acids and solutions. It clamps the part from the opposite side of the attachment. Only a fine thread pitch is used, which prevents unscrewing or shifting. The most common size is a nut with a diameter of M40.

The rectangular channel nut is made of zinc-plated steel, with diameters M8, M10, M12. It is used in engineering structures, construction, road barriers, and the installation of ventilation and piping systems and heating systems. Its highly reliable fastening allows it to be used in both light and relatively heavy structures. It has an electroplated zinc coating. It has high strength, anti-corrosion properties, and high resistance to aggressive media, acids and solutions.

Special-purpose nuts include: cap nuts (GOST 11860-85), wing nuts (GOST 3032-76), and round nuts with an end-face hole (GOST 6393-73). They are used for joining parts on shafts of various diameters. Simple and reliable in use, they are mainly used where frequent hand-tightening or hand-loosening is required, without a wrench. They have high strength, anti-corrosion properties, and high resistance to aggressive media, acids and solutions.

The construction nut (tie nut) is made of high-strength cast iron. It is used to secure formwork during the construction of structures. It is simple to use and reliable. It has a special seating area through which the threaded rod passes, which increases the contact area with the formwork panel and strengthens the structure. It has high strength, anti-corrosion properties, and high resistance to aggressive media, acids and solutions.

The sealing nut is used in hydraulic, pneumatic and fuel systems. It provides a leak-tight seal against gases and liquids under high pressure. It retains its properties when operated in the range +40…+110 °C. Diameters range from M6 to M16. It creates a leak-tight seal against many oils and solvents. It has high strength, corrosion resistance and antifriction properties — low adhesion and the ability to operate in a lubricated environment under friction and sliding. It is resistant to aggressive media, seawater, acids and solutions.

Heavy-duty nuts are used for joining metal structures and bridges. One of the common types is the GOST 5915 and GOST 5927 nut with a diameter of M20, used in mechanical engineering and construction. It retains its properties at operating temperatures up to +500 °C. These high-strength, reliable nuts are suitable where high rotational speed loads of up to 15,000 rpm are required. Such a nut allows the tightening torque to be increased by 75% compared with a standard nut.

The union nut (cap nut, known as ‘amerikanka’) is used in plumbing to join pipes, water meters and heating systems. It is available in cast iron, chrome-and-nickel-plated brass, and stainless steel versions. It allows work to be carried out in hard-to-reach places. The joint can be undone without a wrench, and the line can be dismantled without unscrewing the pipes. It is used with polypropylene pipes. The main models are: GOST 23353-78 and GOST 13957-74 nuts.

The cylinder nut (cylindrical nut) is used in furniture manufacturing for joints with metric fasteners. Common sizes are diameters M6, M8. It is installed on the face side of the part, into a pre-drilled round hole. It is used in joints with metal cabinets and wood products. It has strength, reliability and anti-corrosion properties, similar to body fasteners. The main model is the T410 series.

The press nut (press-fit nut) is used for joining sheet metal, creating a reliable threaded connection. It is available in zinc-plated and stainless versions. It has a toothed ring that provides a secure grip on metal parts and creates the press fit. It is used for joining sheets of different metals. It has high strength and anti-corrosion properties.

The flat nut (reduced-height lock nut) is used in mechanical engineering; it securely holds a device in a hole and prevents parts from loosening due to vibration. It is usually made of plain steel, and is often zinc-plated. The zinc coating improves wear resistance and provides high strength and anti-corrosion properties. It must not be used at temperatures above 170 °C. The main model is DIN 80705. Equivalents: DIN 80705 low nut and DIN 80705 lock nut.

The barrel nut (pin nut) is used for furniture assembly. It is made of zinc-plated steel. It is used together with furniture screws and is fitted into a pre-drilled round hole. It has high strength and anti-corrosion properties.

The screw nut (screw-and-nut drive) is used to generate force pressure, converting the rotation of one part into the linear push of another. It is used in presses, machine tools, screw jacks, machine feed mechanisms, and instrument adjustment devices. It provides slow movement and is capable of self-locking. It has low efficiency due to high friction losses. It has high wear resistance and reliability.

The tie nut is used for working with formwork: it rigidly secures the panels, preventing them from shifting during concreting. It provides a reliable support: three-prong nuts with a diameter of 90 mm and two-prong nuts with a diameter of 100 mm. It is tightened with a crowbar or a wrench. A long sleeve protects against panel displacement caused by vibration. It is cast from VCh-40 ductile iron. It has high strength and supports loads of up to 16 tonnes.

Formwork nut (tie nut) is used in the construction of buildings and structures made of iron. The reliability of the structure is achieved through the combined action of the screw and nut, ensuring a secure connection during concreting. Such panels are used to create partitions and walls. It is distinguished by high strength and durability. Cast from iron, coated with zinc. Provides a reliable support: three-pronged with a diameter of 90 mm and two-pronged with a diameter of 100 mm.

Locking nut is used for fastening pipes to a rail guide. Made of steel, coated with zinc. Has strong properties, reliability, and anti-corrosion properties. Used for pipes with external thread and other threaded connections for reliable fixation of elements. Main model: DIN 3015 T1.

Compression nut is used for connecting pipes in indoor cold water supply and heating works. Provides sealed protection against gases and liquids under high pressure. Retains its properties when operating at temperatures up to +120 °C. Made of brass. Has high strength and anti-corrosion properties.