Rhombic Nut

Product introduction

The diamond thin nut is a special fastener whose thickness is significantly lower than the standard nut. Its name comes from its unique "diamond" cross-section design, which can reduce the height while still providing sufficient load-bearing strength and thread engagement length. This product is mainly used as a lock nut, used in conjunction with standard nuts to form a double nut locking structure. When installed, it acts as an auxiliary nut. By applying pre-tightening force to it, the threads of the upper and lower nuts closely fit the threads of the bolt, generating huge friction, thereby effectively resisting vibration and impact, and preventing the connection from loosening. It is widely used in areas with limited space and high requirements for anti-loosening performance, such as automobile chassis, fluid pipeline connections, mechanical equipment, aerospace and other fields. It is a key locking component.

 

Product Features

1. Excellent anti-loosening and anti-seismic performance: Its core function is to prevent loosening. By using in combination with standard nuts, the principle of "double nut top preload" is used to generate huge friction between threads, which can effectively resist long-term vibration, impact and load changes, prevent loosening of connections, and is extremely safe.

2. Compact and thin design: Compared with standard nuts, its height is significantly reduced. This feature makes it very suitable for occasions with limited installation space. It can achieve reliable locking function in a small axial space and solve many space layout problems.

3. Reliable secondary locking mechanism: As an auxiliary nut (also called a locking nut), it provides reliable secondary protection for the entire connection. After the main nut is initially tightened, tightening the diamond-shaped thin nut can effectively eliminate the thread gap and prevent the main nut from rotating due to vibration.

4. High strength and durability: Although thin in thickness, it is usually made of high-quality steel and heat-treated. It has sufficient mechanical strength and can withstand high preload forces, ensuring long-term durability under harsh working conditions.

5. Reusable and standardized: Its anti-loosening effect does not rely on wearing parts such as nylon and springs, but is achieved through mechanical principles. Therefore, it can be disassembled and reused multiple times. It is economical, complies with international standards, and has strong versatility.

 

Product application

1. Anti-loosening and locking of key structures: widely used in key parts such as building steel structure bridges, large equipment racks, bearing glands of heavy machinery, etc. It acts as an auxiliary nut and cooperates with the main nut to form a double nut lock, which effectively resists long-term vibration and alternating loads, prevents loose connections, and ensures structural safety.

2. Compact design with limited space: It is especially suitable for occasions with small axial installation space such as automobile chassis suspension systems, fluid pipeline connections, valve groups, and compressor interiors. Its thin design can achieve a reliable anti-loosening effect that cannot be achieved with standard nuts in a limited space.

3. Equipment that requires frequent adjustment and maintenance: often used for axial adjustment of machine tool screws, locking of tensioning mechanisms, adjustable connecting rods of automation equipment, etc. Its reusable feature facilitates precise adjustment of the equipment and re-locking reliably after maintenance.

4. Transportation and aerospace: It is also commonly used in some non-core parts of rail transit vehicles, heavy-duty trucks, and aerospace equipment that still need to be secured against loosening to meet high reliability requirements in severe vibration environments.

 

FAQ

Q: How does the diamond-shaped thin nut achieve the anti-loosening effect?

A: It does not play an anti-loosening role by itself. Its principle is to serve as an auxiliary nut, used in conjunction with the main nut. When installing, first tighten the main nut, then tighten the rhombus thin nut and align it with the main nut. In this way, the two nuts squeeze each other, causing the stress-bearing surface of the bolt thread to deviate and generate huge friction, thereby effectively resisting vibration and preventing loosening. This method is called "double nut top locking".

 

Q: Why is it thinner than a standard nut?

A: The thin design has two main purposes: Saving space: making it particularly suitable for compact structures with limited axial installation space.

Optimized force: As an auxiliary nut, its core function is to provide top pre-tightening force instead of bearing the main connection load. The thin design is adequate for its functionality and reduces weight.

 

Q: Can the diamond-shaped thin nut be used alone?

A: Absolutely not. Due to its thin thickness, the number of thread engagement turns is insufficient when used alone, and the bearing capacity and anti-loosening performance are extremely poor. It is easy to trip or loosen after being stressed, posing serious safety hazards. It must be used with a standard main nut.

 

Q: How is it different from spring washers and nylon self-locking nuts in anti-loosening methods?

A: The main difference lies in the anti-loosening mechanism: rhombus-shaped thin nut: using mechanical friction against the top, it is reusable and has stable performance. Spring washer: uses elastic force to compensate for loose gaps, but has limited effect under strong vibration. Nylon self-locking nut: Utilizing the elastic extrusion and friction of the nylon ring, the anti-loosening effect is good, but the nylon ring has a limited service life, and the anti-loosening performance will decrease after repeated disassembly.

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