Hexagonal Flanged Cap Nut

The hexagonal flanged cap nut is a common fastener. The following will introduce it from several dimensions including its structural features, performance advantages, application fields, and relevant standards:

Structural Features of the Hexagonal Flanged Cap Nut

Hexagonal Head: It is convenient for installation and disassembly using conventional tools such as wrenches. It can maintain stable fastening when a large torque is applied, ensuring a firm connection between the nut and the bolt.

Flange Surface: Located at one end of the nut, it is similar to a widened washer. It increases the contact area between the nut and the connected component, making the pressure distribution more uniform. Thus, it reduces the pressure concentration on the surface of the connected component, lowers the possibility of component damage, and also enhances the anti-loosening effect.

Cap: At the other end of the nut, it plays a role in sealing and protection. It can effectively prevent harmful substances such as rainwater, moisture, dust, and corrosive substances from infiltrating the connection part of the nut and the bolt, prevent the nut and the bolt from rusting, and extend the service life.

Threaded Hole: It runs through the nut body and the cap, and is used to cooperate with the bolt to achieve a fastening connection.

Performance Advantages of the Hexagonal Flanged Cap Nut

Good Sealing Performance: The design of the cap enables the nut to effectively seal the end of the bolt after it is tightened, preventing the entry of external moisture, dust, and corrosive media, protecting the threaded connection from erosion, and improving the reliability and durability of the connection.

Enhanced Anti-loosening Performance: The presence of the flange surface increases the friction between the nut and the connected component, making the nut less likely to loosen under vibration or impact loads. In addition, some hexagonal flanged cap nuts may also have a serrated flange edge, further improving the anti-loosening effect.

High Strength and Stability: It is usually made of high-quality metal materials such as carbon steel, alloy steel, stainless steel, etc. Through appropriate heat treatment and processing technology, it has high strength and hardness, can withstand a large axial tensile force and torque, and ensures the fastening performance under various working conditions.

Application Fields of the Hexagonal Flanged Cap Nut

Automotive Industry: It is used for the fixation of components such as automotive engines, suspension systems, and chassis, ensuring that the connections of various components are firm and reliable during the driving process of the vehicle, and can withstand the vibration and impact generated during the vehicle's operation.

Aerospace: Due to its high strength, lightweight, and good corrosion resistance, it is suitable for key connection parts in aerospace vehicles, such as the connection between the wing and the fuselage, the fixation of engine components, etc., which is crucial for ensuring the safety and reliability of the aircraft.

Mechanical Equipment: It is widely used in the assembly and fixation of various mechanical equipment, such as generators, compressors, pumps, machine tools, etc., which can ensure that the relative positions of various components remain unchanged during the operation of the equipment and ensure the normal operation of the equipment.

Petroleum and Chemical Industry: In the fields of petroleum exploration, production, and chemical production, it is used for fixing equipment such as transportation pipelines, storage containers, and reaction kettles, and can withstand the effects of high temperature, high pressure, and corrosive media to ensure the safe operation of the equipment.

Railway Industry: It is used for the fastening of railway track connectors, railway vehicle accessories, etc., and can adapt to the vibration, impact, and harsh environmental conditions in railway transportation, ensuring the stability and safety of railway facilities.

Relevant Standards of the Hexagonal Flanged Cap Nut

GB/T 802.3-2009: It specifies the welded hexagonal flanged cap nuts with thread specifications ranging from M4 to M24, performance grades of 6, 8, A2-50, A2-70, A4-50, and A4-70, and product grades of A and B. Among them, Grade A is used for nuts with D ≤ 16mm; Grade B is used for nuts with D > 16mm.