Flange nuts are a type of nut with a wide flange face, which can increase the force-bearing area, distribute loads, and reduce wear on connected components. They are often used in conjunction with bolts in occasions requiring stable connections. The following introduces several common types of flange nuts.
Plain Flange Nuts
Plain flange nuts are characterized by a smooth, untextured flange face, which is integrated with the nut body. The internal thread precision meets general standards, and the material is mostly carbon steel or stainless steel. The surface can be galvanized, chrome-plated, or otherwise treated to enhance rust resistance.
Its advantages lie in that the flange face can effectively distribute pressure, protect the connected surface from damage, adapt to bolts of various specifications, and is easy to install with low manufacturing costs and strong versatility.
It has a wide range of applications, suitable for pipeline connections, metal frame fixing, mechanical equipment assembly, and other occasions with basic requirements for tightness and uniform force distribution. For example, it is commonly seen in the node fixing of building scaffolding and component connections of ordinary machine tools.
Serrated Flange Nuts
Serrated flange nuts are characterized by evenly distributed serrated grooves on the flange face. The serrations can enhance friction with the connected surface. The nut body and flange face are integrally formed, and the internal thread is consistent with that of plain nuts of the same specification.
Its advantage is that its anti-loosening performance is better than that of plain flange nuts. After the serrations are embedded into the connected surface, they can effectively resist vibration and impact, reducing the risk of loosening, especially suitable for dynamic load environments.
Application scenarios are mostly in occasions with continuous vibration, such as automobile chassis component connections, vibrating screen fixing, and hydraulic pipeline joints of engineering machinery. It can maintain stable fastening effect under high-frequency vibration.
Flange Nylon Insert Lock Nuts
Flange nylon insert lock nuts are characterized by a ring of nylon inserted at the threaded end of the nut. The flange face can be smooth or with shallow teeth. When tightened with a bolt, the nylon ring is squeezed and deformed, closely fitting the thread to form an anti-loosening effect, while the flange face undertakes the role of distributing loads.
Its advantages are that it combines the uniform force distribution of the flange face and the anti-loosening performance of nylon locking. It can be reused after disassembly, and the nylon material causes less wear to the bolt thread, making it suitable for connection parts requiring frequent maintenance.
Application scenarios include the fixing of electronic equipment casings, connection of medical device components, pipeline joints of precision instruments, and other occasions requiring anti-loosening performance and protection of the connected surface, especially suitable for environments without high temperature or strong corrosion.
Flange Metal Lock Nuts
Flange metal lock nuts are characterized by achieving anti-loosening through metal deformation (such as necking, knurling) at the threaded end of the nut. The flange face can be serrated or smooth. The material is mostly high-strength alloy steel, which has high strength after heat treatment and can bear large loads.
Its advantages are stable and long-lasting anti-loosening effect, resistance to harsh environments such as high temperature and oil pollution, excellent shear and impact resistance, and more suitable for heavy-load working conditions compared with nylon lock nuts.
Application scenarios are mainly concentrated in heavy machinery assembly, boiler pipeline connections, bridge steel structure nodes, internal combustion engine block fixing, and other high-temperature, heavy-load, or difficult-to-maintain occasions, which can ensure the reliability of connections under harsh conditions.
Different types of flange nuts have different focuses on anti-loosening mechanisms and applicable environments. When selecting, factors such as vibration intensity, temperature conditions, and maintenance frequency should be considered to achieve a balance between connection stability and economy.
Conclusion
The above are relatively typical flange nuts. In addition, the selection of flange nuts also depends on factors such as thread, performance level, surface treatment, and application scenarios. If you currently need flange nuts but are unsure how to choose, please contact us and let us know your usage requirements - we will match the perfect flange nut according to your needs.
