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Rivet nut is a compact and convenient screw sleeve. The riveting nut is widely used in the plate connection of various industries such as shipbuilding, vehicles, aviation, electrical appliances, appearance, metal cabinets, elevators, etc. It is easy to operate, reliable and beautiful in connection, low consumption and high efficiency. The deformation of the clinch nut is similar to the expansion deformation process of the simple part or the bureaucratic part, and the expansion deformation degree is generally expressed by the expansion coefficient. Next, we will introduce several methods for the surface treatment of the clinch nut!   1、 Plating and plating   The electroplated part is immersed in an aqueous solution containing the deposited metal compound, and an electric current flows through the plating solution to precipitate and deposit the electroplated metal on the part. Press riveting nut post is also known as press riveting stud or nut post, which is a kind of applied to sheet metal, sheet metal, crate and cabinet. One end of the press riveting nut post is in hexagon shape, the other end is in cylindrical shape, the hexagon side and the middle of the cylinder are provided with a screwdriver slot, the internal shape is internal thread, the hexagon head is pressed into the preset hole of the sheet through the press machine to cause plastic deformation around the hole, and the deformed part is squeezed into the screwdriver slot of the press riveting nut post, so that the press riveting nut post is riveted on the sheet, thus forming an effective fixed internal thread on the sheet.     2、 Mechanical Plating   The product surface is impacted by particles of coated metal and the coating is cold welded to the product surface. There is no unified national standard for riveting screws, only industrial standard. Commonly used in electronic, communication, electrical appliances, chassis, cabinet, metal plate and other industries.   3、 Hot Dip Galvanized   This is done by immersing carbon steel parts in a bath of molten zinc at a temperature of about 510 ° C. Press riveting screws can be divided into fast cutting steel press riveting screws, stainless steel press riveting screws and copper and aluminum press riveting screws, which shall be used in different environments. Generally, specifications from M2 to M6 are mostly used. There is no unified national standard for riveting screws, only industrial standard. Commonly used in electronic, communication, electrical appliances, chassis, cabinet, metal plate and other industries. As a result, the Fe-Zn alloy on the surface of the steel gradually becomes passive zinc on the outer surface of the product.

The clinch nut is the next generation of rivet fasteners on the market. It changes the traditional way of mounting parts on plates and is a new breakthrough in the plate connection process. Currently, in the sheet metal industry, riveted rivet nuts are widely used to secure threaded nuts to sheet metal parts.   There are two riveting methods and tools. One is riveting with riveting gun, mainly used for riveting sheet metal parts with less varieties and maintenance; The other is sheet metal punching die riveting, mainly used for riveting a large number of single varieties of sheet metal parts. Both riveting methods have fatal disadvantages such as low production efficiency, high labor intensity and poor riveting quality stability. Another riveting method is automatic riveting. The riveting method is simple in operation and can compensate for the above two methods.   1. Rivet gun riveting method   Riveting steps of riveter: remove parts → insert nut → screw rivet head into nut → pull rivet → screw rivet head out of nut → finished product   Disadvantages of riveting method of riveting gun: complicated steps, low efficiency of manual insertion and placement of nuts, low production efficiency, high skill requirements for employees, short service life of riveting gun and short service life of riveting gun head.   2. Die riveting method   Die riveting steps: take part → insert nut → position on die → press riveting → finished product, defects of die riveting method: complicated steps, low manual nut insertion efficiency, low production efficiency, poor compatibility between fixed stroke riveting method and nut length deviation, unstable riveting quality.   3. Automatic riveting scheme design   Automatic plug-in equipment has been widely used in the metal plate industry, and the technology has been fairly mature. However, since the rivet nut used by the automatic insertion device is a clinch nut, there is no precedent for the use of a rivet nut. Compared with pull riveting, press riveting still has the following disadvantages:   (1) For rivet nuts of the same specification, the cost of the compression nut is higher than that of the rivet nut (according to the market price).   (2) Pressure riveting has strict requirements on plate thickness (material thickness ≥ 1.0mm), so it is not applicable to parts requiring thin material (material thickness<1.0nm). If the thickness of the plate is increased to accommodate the riveting, the production cost will be greatly increased. Meanwhile, the structural parameters of rivet nuts for different plate thicknesses are different. If rivet nuts are used in production, the variety and size of nuts will increase, resulting in increased production and quality management costs.     Most rivet nuts used in the sheet metal industry are hexagon nuts. At present, universal automatic insertion equipment cannot be used for hexagon rivet nuts, mainly because automatic insertion cannot realize the directional drive of hexagon rivet nuts. The issue of directional delivery of riveted nuts can be solved by replacing hexagonal riveted nuts with cylindrical riveted nuts. However, there is a risk of rotating quality when screwing in the screw after the cylindrical rivet nut has been riveted.   At present, the design principle of riveted connection structure adopted by the metal plate industry is that the riveted hole and riveted nut have the same shape. For example, a square rivet nut hole matches the square rivet nut and a round rivet nut hole matches the round rivet nut. If this principle is applied to a round rivet nut hole with a round rivet nut, there will be serious rivet quality problems. When the screw is screwed into the clinch nut, the nut rotates and the part cannot be assembled and secured. The main reason for rotation of the rivet nut is that the circular rivet nut cannot form a structure preventing rotation after being riveted.

Rivet nuts are fast connectors used to fasten thin plates or connect two objects, and are widely used in many mechanical equipment and automobile manufacturing industries.   When using the clinch nut, pay attention to the following items:   1. Select the appropriate size of the clinch nut. Size of the riveting nut shall be selected according to the thickness of the object to be connected. If the size of the nut is too large or too small, the fixing effect may be poor.    2. Position the clinch nut. Before installing the clinch nut, its position shall be determined to ensure that no error will occur during installation.   3. Precautions for operation. When tightening bolts or nuts, operate according to the specified torque value to ensure the fastness of the connection.      4. Suitable environment. When installing the clinch nut, provide an appropriate environment for the operator to avoid safety problems.    5. Check the installation results. Upon completion of installation, the fixing effect of the clinch nut shall be checked to ensure its tightness with the object to be connected.

Rivet nut is a kind of fastener widely used in the field of mechanical manufacturing and assembly. It is fixed on thin workpieces such as thin plates and thin-wall pipes by pressure to realize reliable connection. Compared with the traditional threaded connection, the riveting nut has the characteristics of fast, convenient and efficient, significantly improving the assembly efficiency and product quality. First, the clinch nut allows quick connection.   The traditional threaded connection requires the screw tightening process, while the clinch nut is fixed in the workpiece by pressing method. This press-in method is a very fast and simple operation without tedious rotational action, greatly saving assembly time. In the industrial environment of batch production, the fast connection characteristics of clinch nuts can greatly improve the production efficiency.     Secondly, the connection effect of the riveting nut is reliable. During the pressing process, the nut bottom is deformed, forming a good occlusion connection with the workpiece, so as to ensure the fastness and stability of the connection. In addition, the riveting nut can also form an internal locking device during the connection process to prevent loosening and falling off and improve the reliability of the connection. This reliable connection effect is suitable for various application scenarios with vibration and impact loads. In addition, clinch nuts are widely used. It can be used for the connection of various thin workpieces such as plates and pipes, such as metal plates, aluminum alloy plates, plastic plates, etc. Whether in automobile manufacturing, electronic equipment, mechanical equipment, furniture assembly and other industries, you can see the rivet nut.   Moreover, a wide variety of sizes and types of clinch nuts can meet different connection requirements, providing flexibility and customization. To sum up, the clinch nut is a fast coupling tool that improves assembly efficiency and product quality. Its fast connection, reliability and wide application make it widely used in the field of mechanical manufacturing and assembly. As an innovative connection solution, clinch nuts provide convenience in driving industrial production and become an important tool to improve assembly efficiency.

As a quick connector, rivet nuts have the following advantages:     1. The fastening effect is good. The objects connected by rivet nuts are tight and not prone to loosening.     2. Easy to install. Rivet nuts can be quickly fixed using specialized tools, with fast and simple installation speed.     3. Widely applicable. Rivet nuts can be used to connect objects of different thicknesses or materials, and are suitable for use in various mechanical equipment and automotive manufacturing industries.     4. Strong anti vibration ability. Due to its good fastening effect, rivet nuts can be used in environments with high-frequency vibration and impact. Rivet nuts have a wide range of applications, including the automotive industry, aerospace industry, military industry, construction industry, etc., and are suitable for mechanical equipment in various fields. When using rivet nuts, it is necessary to choose the appropriate size and matching tools according to different connection situations to ensure their fixing effect and service life.

As a fixed connection technology, welded nuts play an important role in metal manufacturing and structural engineering. They provide a reliable solution for building high-strength, durable and stable connections by directly welding nuts to the surface of metal components.   1. Working principle   Welding nuts are fixed to metal plates or other metal components using methods such as arc welding, gas shielded welding, or laser welding. During the welding process, the metal on the surface of the nut and substrate melts and combines, forming a metallurgical bond after cooling, ensuring extremely high connection strength and durability.     2. Advantages   (1) High strength connection   The connection points formed by welding can withstand great tensile and torsional forces, making them suitable for high load applications.     (2) Anti loosening measures   Welding nuts are almost impossible to loosen due to vibration or external forces.     (3) Wide applicability   Can be used for metal parts of various thicknesses and materials, including but not limited to steel, stainless steel, and aluminum.     (4) Simplify assembly   Pre fixing welding nuts reduces on-site assembly steps and accelerates production speed.     3. Application Fields   (1) Building Structure   Reinforcement connections in bridges and steel structures.     (2) Automobile manufacturing   Fixing of vehicle body frame and chassis components.     (3) Heavy Machinery   Assembly of heavy equipment such as cranes and excavators.     (4) Railway transportation   Connection of structural components of rail vehicles.     (5) Electrical equipment   Tightening of internal structures of distribution cabinets and control boxes.     4. Selection and Welding Techniques   (1) Nut selection   Select appropriate materials and specifications for welding nuts based on the application environment, such as stainless steel nuts suitable for corrosive environments.     (2) Preprocessing   Clean the nut and substrate surface before welding, remove oil stains and rust, and ensure welding quality.       (3) Welding technology   Choose appropriate welding methods and parameters to avoid thread damage or deformation caused by overheating.     (4) Cooling treatment   After welding, cool appropriately to avoid cracks caused by thermal stress.     (5) Quality inspection   After welding is completed, check the integrity of the weld seam and the availability of the threads, and perform non-destructive testing if necessary.     Welding nuts have become an indispensable fastening method in many industrial fields due to their strong performance and reliability in metal component connections. The correct selection and welding process are key to ensuring its performance.

Clip nut   The rapid installation innovation in fasteners is gradually changing the operation mode in the traditional assembly field. This cleverly designed fastener, with its simple and fast installation characteristics, has become the preferred solution for many industries to improve assembly efficiency. The card nut achieves a firm bite on the fixed substrate through its unique card slot or expansion structure, without the need for additional tooling or complex operations, and can be quickly tightened with one hand, greatly saving labor and time costs.       It has a wide range of applications, from furniture assembly and electronic products to automotive manufacturing, construction and other fields, and can be seen with snap nuts. There are various materials available, including plastic materials that meet general strength requirements and metal materials suitable for high-strength requirements, ensuring reliable fixation in different usage environments. Especially for application scenarios that require repeated disassembly and assembly, the reusability of snap nuts is a major highlight, which extends the product's service life and also conforms to the modern design concept of resource conservation.     With the transformation of manufacturing towards automation and intelligence, card nuts are also constantly evolving, developing products more suitable for automated assembly lines, such as self-locking card nuts used in conjunction with robots, further improving production efficiency and quality control levels. In short, as an innovation in fastening technology, snap nuts not only simplify the installation process, but also promote industrial upgrading in various aspects, making them an indispensable fast installation solution in the modern manufacturing field.

Different materials of rivet nuts have significant differences in performance, and understanding these differences can help select the appropriate rivet nut according to specific application needs. The following are performance comparisons and selection suggestions for common materials such as rivet nuts:       1. Performance comparison of rivet nuts made of different materials   Steel (carbon steel and alloy steel)   (1) Carbon steel   Performance: High strength, low cost, but poor corrosion resistance.   Application: Commonly used in general mechanical assembly and fixing situations.   Attention: Rust prevention treatment is required to extend the service life.       (2) Alloy steel (such as 10B21, 20CrMo):   Performance: Higher strength, good wear resistance, and some alloys also have good high temperature resistance.   Application: Used in situations where high loads and stresses are applied, such as automobiles and heavy machinery.   Attention: The price is relatively high and usually requires heat treatment to increase performance.       (3) Stainless steel   Type: 304, 316, etc   Performance: It has excellent corrosion resistance and high temperature resistance, with moderate strength.   Application: Suitable for humid and highly corrosive environments, such as chemical, food processing, and marine applications.   Attention: Although the cost is high, its excellent corrosion resistance can reduce maintenance requirements and replacement frequency.       (4) Aluminum alloy   Performance: Lightweight, corrosion-resistant, good thermal conductivity, but low strength and hardness.   Application: Used for applications with high lightweight requirements, such as aerospace products.   Attention: Due to its low strength, it is usually used in situations where the load-bearing requirements are small.       (5) Brass   Performance: Good corrosion resistance and conductivity, moderate strength, easy to process.   Application: Commonly used in electrical connectors and situations requiring good conductivity.   Attention: Relatively expensive, suitable for applications that require high conductivity or corrosion resistance.       2. Choose Suggestions   When selecting the appropriate material for rivet nuts, comprehensive consideration should be given to the specific application environment, performance requirements, and cost budget       (1) Consider environmental factors   Corrosive environment: If the application environment is humid or highly corrosive, stainless steel or aluminum alloy materials should be selected.   High temperature environment: Alloy steel or high-temperature corrosion-resistant stainless steel may be more suitable in high temperature environments.       (2) Evaluate mechanical load   High load: For applications that require high loads, such as heavy machinery and automobiles, it is recommended to choose alloy steel or high-strength steel.   Light load: For applications with lower loads, aluminum alloy or brass materials can be considered.       (3) Economic considerations   Cost budget: If the budget is limited, carbon steel rivet nuts may be a more economical choice, but their corrosion resistance needs to be considered to meet the requirements.   Long term use: If long-term use or use in harsh environments is required, it may be necessary to invest in more expensive materials such as stainless steel to reduce maintenance and replacement costs.       (4) Processing and installation   Processing difficulty: Some materials (such as aluminum alloy) are easier to process, while others (such as stainless steel) are more difficult to process. When selecting materials, it is necessary to consider the processing equipment and technical capabilities.   Installation tool: Ensure that the selected material's rivet nut is compatible with existing riveting tools to avoid difficulties during installation.       3. Summary   Different materials of rivet nuts have their own characteristics in terms of performance, and when selecting, factors such as application environment, load requirements, cost budget, and processing difficulty should be comprehensively considered. By understanding the advantages and disadvantages of various materials, material selection suitable for specific applications can be made to ensure the long-term stability and reliability of rivet nuts.

Rivet nut column, also known as rivet screw column or nut column, is a type of fastener used in sheet metal, thin plate, chassis, and cabinets. Rivet nut columns are divided into four types based on material and internal thread form: quick cut steel through-hole rivet nut column SO type, stainless steel through-hole rivet nut column SOS type, quick cut steel blind hole rivet nut column BSO type, and stainless steel blind hole rivet nut column BSOS type, which are respectively used in different environments.     Technical Guidelines for the Application of Rivet Nut Columns:   1. When selecting nut posts, it is necessary to determine the size range based on the thickness of the plate used. The hardness of low-carbon steel plate must be less than 70RB, and the hardness of stainless steel plate must be less than 80RB.   2. The surface of the easy to cut iron is treated, and the stainless steel maintains its original color. Users can order according to the model specifications in the table or customize according to their needs.   3. The hole size of the board must be processed according to the tolerance size of 0-+0.075mm, and it is recommended to punch.   4. Installation must be achieved through "riveting" operation, and must not be impacted or knocked in.   5. When selecting stainless steel as the material, the tail number should be indicated with "S".   6. The end face of the nut column with straight teeth is represented by "C".   7. The length of the through-hole nut column below 10mm is full thread, and above 10mm, it can be enlarged with hexagonal end face square (Type I) or circular end face (Type II).

In addition to the core process, there are also significant differences between electroplating and hot-dip galvanizing of rivet nuts in terms of processing equipment and process points, which directly affect the zinc layer thickness, bonding strength, and performance of rivet nuts       1. Details of hot-dip galvanizing process       The hot-dip galvanizing process involves more steps and requires strict pre-treatment of the rivet nut. It needs to go through multiple pre-treatment processes such as oil removal, acid washing, immersion, and drying before immersing the rivet nut into the molten zinc pool. The immersion time of zinc should be precisely controlled according to the size and thickness of the rivet nut to ensure uniform thickness of the zinc layer (usually the zinc layer is thicker, up to 85 μ m or more). For example, in the hot-dip galvanizing process of large-sized rivet nuts used in construction machinery, it is necessary to focus on controlling the galvanizing temperature and time to avoid thread blockage caused by excessive zinc layer, which may affect subsequent assembly.       2. Details of galvanizing process       Electrogalvanizing requires the use of professional electrolytic equipment for processing. After the rivet nut undergoes pre-treatment processes such as oil removal and acid washing, it is immersed in an electrolytic solution containing zinc salts. By connecting the positive and negative poles of the electrolytic equipment and utilizing the directional movement of current, zinc ions precipitate and deposit on the surface of the rivet nut to form a zinc layer. The zinc layer thickness of this process is relatively thin (usually 5-15 μ m), which can accurately control the uniformity of the zinc layer and meet the processing requirements of high-precision rivet nuts (such as micro rivet nuts used in electronic devices). It can effectively preserve the thread accuracy and dimensional tolerance of rivet nuts and avoid the influence of the process on assembly performance.       Differences in appearance and performance       The appearance of rivet nuts after galvanizing and hot-dip galvanizing is significantly different, which can be used as a visual reference for scene selection. The specific appearance features are as follows:       1. Appearance of hot-dip galvanized rivet nut       The overall appearance of hot-dip galvanized rivet nuts is slightly rough, and the surface will inevitably produce features such as process water marks and zinc droplets, especially at one end of the rivet nut (hanging plated end). The overall appearance of the zinc layer is silver white with low glossiness, but the zinc layer is fully covered without defects such as missed plating or exposed substrate, making it suitable for heavy-duty scenarios with low appearance requirements and emphasis on anti-corrosion performance (such as rivet nuts for construction and mining machinery).       2. Appearance of electroplated galvanized rivet nuts       The surface of the electroplated galvanized rivet nut is smooth and flat, without obvious process defects. The core appearance color is yellow green, and it can be presented in various colors such as rainbow, blue white, white with green light according to process requirements. The entire surface of the rivet nut is basically free of zinc nodules, clumps, and other phenomena. The threads are clear and complete, suitable for scenarios with high requirements for appearance accuracy and assembly accuracy (such as rivet nuts for automotive interiors and electronic devices).       Core recommendations for the selection of electroplated and hot-dip galvanized rivet nuts       The core difference between electroplating and hot-dip galvanizing of rivet nuts is essentially the process positioning difference between "light anti-corrosion, high precision" and "heavy anti-corrosion, strong tolerance". The adaptation scenarios of the two are clear, and the selection needs to be comprehensively judged based on the usage environment, assembly requirements, and anti-corrosion requirements of rivet nuts       If rivet nuts are used in heavy-duty, outdoor, humid, or acid alkali corrosion scenarios (such as engineering machinery, construction machinery, mining equipment), hot-dip galvanizing technology is preferred. Its thicker zinc layer can achieve long-term corrosion resistance and withstand complex working conditions impact;       2. If rivet nuts are used for light loads, indoor environments, and high requirements for appearance accuracy and thread accuracy (such as electronic devices, automotive interiors, and precision instruments), electroplating technology is preferred. Its smooth surface and precise size control can ensure assembly reliability and aesthetic appearance.       As a core fastener, the choice of galvanizing process for rivet nuts directly affects the operational stability and service life of the equipment. It is necessary to accurately control the core differences between the two galvanizing processes and make reasonable selections based on practical application scenarios in order to maximize the assembly value and anti-corrosion ability of rivet nuts, and provide core guarantees for the reliable operation of equipment in various industries.

Stainless steel screws are a type of steel screw that can resist corrosion from gases, water, acids, alkali salts, and other substances. They are widely used in industries such as environmental protection machinery, medical equipment, and communication devices. However, when purchasing stainless steel screws, customers generally only focus on the specifications and models of the screws (such as 2, I3), and rarely mention the pitch of the screws. This article discusses the necessity of the pitch of stainless steel screws and the effectiveness of the pickling process.   The pitch of stainless steel screws is crucial for installation. If the pitch of the screw is not consistent with the pitch of the inner hole or bolt to be installed, installation cannot be carried out, and only screws, nuts or spare parts need to be replaced. When purchasing screws from screw manufacturers, some customers do not specify the tooth pitch of specific screws, and the manufacturer generally defaults to the tooth pitch of coarse teeth.     Therefore, if the pitch of stainless steel screws is special and does not match the coarse pitch, users should confirm the required pitch with the screw manufacturer before purchasing. Otherwise, it may not be properly assembled during use. Friends working in the field of metal products should be familiar with acid pickling. Acid washing is a process of removing the oxide layer on the surface of metal materials. In addition, a layer of polyphosphate plastic film is formed on the premise of removing the oxide layer, which plays a certain role in the later stage of electrostatic spraying and shaping.   Firstly, grasp the concentration and temperature of acid washing in the pool. Then place the screws waiting to be processed into a pre prepared pickling tank to remove the oxide layer on the surface of the metal material. Next, transfer the screws to the sewage well to eliminate the corrosive components on the surface. Then hydrochloric acid is used to enhance the metal activity and fully prepare for the next step of polyphosphate coating. The final step is the key step, which is to contact the surface of the metal material and produce a coating of polyphosphate salt to solve the problem. Acid washing is a key factor in the manufacturing of screws. Only by properly executing the entire acid washing process can the subsequent processing techniques be successfully carried out and meet certain quality standards.

Why can't excavators use regular bolts casually?   No matter how old you are, no boy can refuse an excavator! The strength of China's infrastructure construction is beyond doubt, and the technology components of Chinese control excavators are well-known to everyone. As an important engineering machinery equipment in construction projects, there is no need to say much about the necessity of excavators. So, what should be paid attention to when using various types of excavator screws on vibration control machines?     What are the consequences of using ordinary bolts directly on excavators? Many people have a mentality when maintaining excavators that if the screws of a larger excavator come loose, they will come to the original equipment for replacement. However, for some small bolts and screws that must be replaced, it is easy to find a replacement of the same model. It is precisely because of this mindset that excavators continue to experience frequent malfunctions even after maintenance. The main reason is that many excavator screws used on excavators have very high performance and quality requirements, and currently, randomly finding sonic bolts on the market may not necessarily meet specific practical needs. If there are many parts of the excavator that require the use of "fine buckle" bolts, electroplated copper bolts, and copper bolts, if bolts are directly used instead, it is likely to cause many problems such as loosening and difficulty in disassembly. Some bolts may also be stretched and deformed when used, and it is surprising that the excavator does not malfunction if they are repeatedly used.   In addition, there are some specialized bolts on excavators that have strict requirements for strength and ductility, which require unique materials and special manufacturing processes, such as engine crankshaft bolts, cylinder ginger bolts, connecting rod bolts, flywheel bolts, nozzle peripheral anchor bolts, etc. For example, the bolts connecting the excavator walking motor to the drive teeth are used in special places, and can be easily damaged if not careful. Therefore, high-strength bolts are needed to ensure the stability of tightening. In summary, every small bolt in the excavator is very important and must not be replaced casually.

What materials and scenarios are rivet nuts suitable for?   Rivet nut is a commonly used fastener that is suitable for many materials and scenarios. Next, we will provide a detailed introduction to the materials and scenarios suitable for rivet nuts, and analyze their characteristics and advantages.   Firstly, rivet nuts are suitable for various materials. It can be used for metal materials such as steel, stainless steel, copper, aluminum, etc. These metal materials have high strength and corrosion resistance, and are widely used in fields such as machinery, automobiles, and construction. Rivet nuts are also suitable for some non-metallic materials such as plastic, rubber, etc. These materials can provide reliable connections and fastening effects by riveting fixed nuts.     Secondly, rivet nuts are suitable for various scenarios. Firstly, it can be used in scenarios where space is limited or difficult to access. The characteristic of rivet nuts is that they do not require insertion and fixation from the other side, only one side is needed for installation and disassembly. Therefore, in scenarios where equipment or structure is limited, rivet nuts can provide a convenient and fast fixing solution. Secondly, rivet nuts are suitable for scenarios that require frequent disassembly and reinstallation. Traditional threaded connections require the use of bolts and nuts, which require rotating the threads for fixation and can easily cause damage or wear. The rivet nut can be fixed by pressure without rotation, and can be reused multiple times, improving the efficiency and reliability of fixation. In addition, rivet nuts are suitable for scenarios with material limitations. Some thin-walled or brittle materials, such as glass, ceramics, etc., are not suitable for thread cutting, but can be fixed using rivet nuts. Rivet nuts can form a uniform fixing surface through pressure, dispersing force and reducing damage to materials.   Rivet nuts have many advantages. Firstly, it can provide a high-strength fixing effect. The design of the rivet nut enables it to withstand high pressure and tension, ensuring the safety and reliability of the connection. Secondly, it can provide good sealing performance. By using appropriate sealing gaskets, rivet nuts can provide a good sealing effect, preventing liquid or gas leakage. In addition, rivet nuts also have the characteristic of anti loosening. Under normal use and vibration conditions, rivet nuts can be prevented from loosening and falling off through the design of an internal clamping mechanism. Rivet nuts have a certain lifespan and reusability. Rivet nuts are usually made of high-strength stainless steel material, which has a long service life and can be disassembled and reinstalled multiple times to reduce material waste.   In summary, rivet nuts are suitable for various materials and scenarios, and have many advantages. It can provide high-strength fixing effect, suitable for scenarios with limited space or difficult to access, can be disassembled and reused multiple times, and is suitable for various metal and non-metal materials. In practical applications, we can choose suitable rivet nuts according to specific needs to provide reliable and convenient fixing solutions.  

Rivet nut is a type of fastener used for fixing connections, suitable for various industries and fields. Below, we will provide a detailed introduction to several major industries and fields.   1. Automobile manufacturing   Rivet nuts are widely used in the automotive manufacturing industry. In the body and chassis structure of automobiles, rivet nuts are used to connect metal plates, bolts, pipes, etc. They can provide a strong connection and have good anti loosening performance, effectively reducing the loosening problem caused by vibration during vehicle use.     2. Aerospace   The aerospace industry has extremely high requirements for connections, requiring the use of high-strength, high-temperature resistant, and corrosion-resistant fasteners. Rivet nuts precisely meet these requirements and can be fixed onto very thin sheets using the pressing method without causing any damage to the sheet. Therefore, rivet nuts are widely used in fields such as aircraft fuselage, engines, landing gear, and satellites.   3. Manufacturing of electronic devices   Rivet nuts also play an important role in the manufacturing process of electronic devices. For example, the casing of electronic products such as mobile phones, laptops, and tablets is usually made of metal or plastic sheets. Stainless steel threads can be firmly connected to the sheets through rivet nuts to protect the electronic components inside the device.   4. Mechanical manufacturing   The mechanical manufacturing industry is one of the main application areas of rivet nuts. Both small and large machinery require a large number of fasteners to secure and connect various parts. Rivet nuts can be used in mechanical manufacturing equipment such as machine tools, cranes, conveyors, and excavators to ensure their stability and safety during high-intensity operations.   5. Railway transportation   In the field of railway transportation, rivet nuts are also widely used. They can fixedly connect the steel rails and track bed, prevent the loosening or displacement of the steel rails, and ensure the safety and reliability of the railway line. In addition, rivet nuts can also be used to connect wheel rails and hinges, as well as some fixed parts inside train carriages.   In summary, rivet nuts are suitable for multiple industries and fields such as automobile manufacturing, aerospace, electronic equipment manufacturing, machinery manufacturing, railway transportation, etc. They play a crucial connecting role in these fields, with characteristics such as stability, reliability, and corrosion resistance, and have therefore been widely applied and recognized.

Nuts are mainly classified according to their properties, including national standards (GB), German standards (DIN), international standards (ISO), Japanese standards (JIS), American standards (ASTM/ANSI), and other standards. Among them, national standards, German standards, and Japanese standards are represented by M (such as M8, M16), while American and British standards are represented by fractions or # (such as 8 #, 10 #, 1/4, 3/8).     1. Common national standards for nuts   (1) GB41 Type I Hexagonal Nut - Grade C   (2) GB6170 Type I Hexagonal Nut - Grade A and B   (3) GB6171 Type I Hexagonal Nut - Fine Thread - Grades A and B   (4) GB6172 Hexagonal Thin Nut - Grades A and B - Chamfering   (5) GB6173 Hexagonal Thin Nut - Fine Thread - Grades A and B   (6) GB6174 Hexagonal Thin Nut - Grade B - No Chamfering   (7) GB6175 Type II Hexagon Nut - Grade A and B   (8) GB6176 Type II Hexagonal Nut - Fine Thread - Grade A and B   (9) GB6177 Hexagonal Flange Nut - Grade A   (10) GB55 hexagonal thick nut   (11) GB56 hexagonal thick nut   (12) GB1229 Large Hexagon Nut (High Strength for Steel Structures)

1、 Product Details   1. Waterproof nuts are divided into B type and BS type.   2. The B-type material is carbon steel, and the default surface treatment is blue white zinc.   3. The BS type material is stainless steel, and the surface treatment defaults to stainless steel natural passivation treatment. Made by forging SS304 or 303, it is used in rust proof work environments and has a sealing and waterproof effect.     2、 Attention:   1. Requirements for the board:   The hardness of carbon steel sheets should not exceed HRB70 °. Thin sheets cannot be subjected to heat treatment; The hardness of stainless steel plate shall not exceed HRV80 °.     2. Adaptation of Waterproof Nut and Board Material   (1) Type B corresponds to carbon steel thin plates.   (2) BS type corresponds to aluminum and copper plates, and it is not recommended to press stainless steel plates.     3、 Working principle of rivet nut   Waterproof rivet nut, also known as sealed rivet nut column or waterproof nut column, has a blind hole internal thread, and the head end is equivalent to an S-shaped rivet nut, which is riveted to the plate to form an effective internal nut. The blind hole design of waterproof rivet nuts can effectively prevent external substances from entering, and the rod of the product can be used as a positioning rod for installing other parts. The installation method combines the characteristics of rivet nut installation and rivet bolt installation, and waterproof rivet nuts are used in working environments that require closed bottom ends.

Loosening screws are also known as non loosening screws or loose screws. Everyone's habitual name is different, but in fact, the meaning is the same.   It is achieved by adding a small diameter screw, which is used to hang the screw on the connecting piece (or through a clamp or spring) to prevent the screw from falling off. The screw structure itself does not have the function of preventing detachment. The function of preventing detachment of the screw is achieved through the connection between the screw and the connected part, that is, by using a corresponding structure to clamp the small diameter screw of the screw onto the installation hole of the connected part to achieve the function of preventing detachment.     The front of the screw is threaded and the middle is a thin screw, cleverly using the thin screw to achieve imitation detachment.   It is mainly divided into the following categories:   1. Slotted disc head does not come out screw GB/T837   2. Hexagonal head non dislodging screw GB/T838   3. Wave head does not come out screw GB/T839   4. Slotted countersunk head does not come out screw GB/T948   5. Slotted semi countersunk head does not come out screw GB/T949     Due to the requirement that screws are not easily loosened in many industries, it is also important to choose a screw manufacturer. As a screw manufacturer with years of experience in customized production, we can customize suitable screws that do not come loose according to different usage scenarios. We can process and customize according to customer needs based on drawings and samples. Whether it's production technology or product quality, we ensure that you have peace of mind and peace of mind. If needed, please feel free to call for consultation.

As the name suggests, even if it is loose, it will not fall off. Loosening screws, also known as non loosening screws or anti loosening screws. Cross loosening screws are riveted or expanded on the mounting plate, and the position between the plates is fastened by screws. The biggest feature of the product is that the screws will not come off even if they are not tightened.     Cross loosening screws are suitable for:   1. Stainless steel plate, metal steel plate, galvanized steel plate, engineering installation.   2. Metal curtain walls, metal light partitions, and other indoor and outdoor installations   3. Generally, angle steel, channel steel, iron plate are installed in combination with other metal materials.   4. Assembly projects for automobile containers, shipping containers, shipbuilding industry, refrigeration equipment, etc.     The installation method of different types of cross shaped screws with a round head that cannot be loosened is also different. The installation method of the screws with a loose head that cannot be loosened is selected according to their application scenarios, as follows:   1. Self tightening (or press in) screws are relatively easy to install and can be operated in one step. They are commonly used in the metal plate industry.   2. The expansion (rupture) type screws that cannot be loosened require less installation force and are more suitable for installation in Zhejiang or thin panel installation.   3. Additional radial floating is required during the installation of floating screws to compensate for significant misalignment tolerances.   4. The snap in screw can be manually installed without the need for special tools.

Sen Yi fasteners are various screws used on panels: non loosening screws, also known as spring screws. Loose screws can be riveted onto iron plates and can be screwed in and out And the integral part can be firmly embedded in the panel without detaching from the panel, so it is also called a non dislodging screw. The outer circle of the hand screw sleeve is usually pressed with straight teeth for easy hand tightening or manual tightening, so it is also called hand tightening screw or hand tightening screw.     Loose panel screws (spring screws) can be used to install PCB boards, occupying only a small space. The rivet sleeve of the hand tight screw has embossed teeth and is pressed into the chassis or thin plate hole (note: the drilling hole diameter of the thin plate corresponds to the pressing tooth diameter of the spring screw, please refer to the following technical parameters), forming an exposed spring screw that can be manually screwed on the other end (i.e. the hand screwed end) Because there is a spring fixed inside, the screw moves back and forth relative to the other end of the thin plate. This solution solves the problem of frequent disassembly of screws and is very convenient and practical.     There are many types of screws that cannot be loosened, and the following are the commonly used ones:   (1) PF09/PF10 hand tightening screws   (2) PF11/PF12 non loosening screws   (3) PF21/PF22 panel screws   (4) PF30/31/32 spring screw   (5) PFC2P spring screw   (6) PF41/PF42 screws that cannot be loosened   (7) PF16/PF26 panel screws   (8) PFS2/PFC2 does not come out of the screw   (9) PF50/PF60 spring screws   (10) PFHV rivet combination screw     Components of non loosening screws/spring screws:   1. Screw part: used to fasten the other end of the chassis thin plate, usually made of carbon steel and stainless steel, with a cross or straight groove on the head to facilitate tool tightening.   2. Hand twisted sleeve: usually straightened with patterns, made of aluminum, sometimes requiring aluminum oxidation blackening as needed.   3. Rivet sleeve: Rivet it to the panel and rely on it.   4. Spring: facilitates the extension and retraction of screws and prevents the entire component from coming out.   After each component is produced, it is assembled as a whole and the hand screw part is pressed together with the rivet part through a spring to form a complete and unbreakable spring panel screw.     Loose screws are suitable for:   1. Stainless steel plate, metal steel plate, galvanized steel plate, engineering installation.   2. Metal curtain walls, metal light partitions, and other indoor and outdoor installations.   3. Generally, angle steel, channel steel, iron plate are installed in combination with other metal materials.   4. Assembly projects for automobile containers, shipping containers, shipbuilding industry, refrigeration equipment, etc.   The panel screw is called a non loosening screw because the head of the product has a ring of embossed teeth, which will not fall off when screwed in or out of the thread after riveting installation, occupying very little space and filling the installation error between the base fitting holes. Due to its straight embossed design on the head, it can be tightened directly by hand, hence it is called a hand tightening screw.

      Loosening screws, also known as loosening screws, spring screws, or non loosening screws, are riveted or expanded on the mounting plate, and fastened to the position of the plate by screws. As the name suggests, screws that are not loose are easy to understand as being both loose and not falling off, and are commonly used in various fields such as power technology and switches. Loose screws are used to fix the position of the screw fastening plate to the plate by expanding rivets. When in use, they can be directly locked with tools or manually tightened to achieve convenient connection between plates without the need for additional separate screw assembly.   At present, the majority of screws on the market that do not come loose use a tight fit between plastic washers and threads to prevent detachment. This involves forcibly inserting the threaded part into the inner hole of a plastic washer that is smaller than the thread, and utilizing the elastic recovery of the plastic to prevent the screw from coming out.     This approach has the following drawbacks:   1. Forcefully assembling may cause plastic damage and pose a risk of detachment.   2. Plastic damage may lead to the production of plastic shavings and their attachment to threads.   3. The assembly method of plastic gaskets and outer sleeves is adhesive bonding. The adhesive backing method used for ordinary screws generally does not have high temperature resistance, while the operating environment temperature of electronic products can generally reach 60 degrees or higher, which may cause adhesive backing failure; There is also a risk of softening and deformation of plastics when used in high-temperature environments.   4. The market's demand for environmental protection of products is increasing day by day. From the control of cadmium free to flame retardant additives, to RoHS, to halogen-free requirements, the environmental risks of plastic products are far greater than those of metal structured products.   On the other hand, traditional screws that cannot be loosened are often unable to be tightened by hand due to insufficient friction, or require specific tools to lock, which limits their applicability.   Technical implementation elements:   The purpose of this utility model is to provide a non loosening screw, which replaces traditional plastic washers with an inner sleeve made of metal material, avoiding plastic damage caused by forced assembly and softening deformation during use in high temperature environments. The use of metal material reduces environmental protection risks; When in use, the friction is increased by straightening the pattern, which can be easily tightened by hand, locked with a straight or cross screwdriver, and even tightened with a pin as a lever, making it widely applicable.   In order to achieve the above objectives, the technical solution adopted by the present utility model is: a non loosening screw, comprising a screw, a spring, an outer sleeve, and an inner sleeve. The upper section of the screw is fitted with a spring, and the lower section passes through the cooperating outer sleeve and inner sleeve in sequence. The upper end of the spring contacts the screw head, and the lower end contacts the outer sleeve. The screw comprises a head, which extends downward to form a step, a rod, and a threaded part in sequence. The upper end of the head is provided with a screw groove, and the center position is arc-shaped concave. The screw groove is in a cross shape without edge sealing. The outer edge surface of the head is provided with straightening patterns, and the middle part is provided with a through pin hole.