- Exclusive Interview with Industry Experts to Analyze Application Cryptography in Special Fields
A change in the shape of a bolt could reduce the weight of aerospace equipment by 10% and extend the lifespan of power transmission towers by 20 years. Recently, the patent of "A kind of special-shaped bolt Fastener" issued by Jingjiang Feitian Fastener Manufacturing Co., Ltd. has brought the "small part" of special-shaped copper bolts into the public eye. This type of fastener, which combines the characteristics of copper material with non-standard design, is becoming a "must-have" in special fields such as power, electronics, and aerospace. Journalists conducted exclusive interviews with industry experts to reveal its application advantages in high-end manufacturing. ​
Electric Power Engineering: The "Stable Anchor Point" in Harsh Environments
On the power transmission towers in the Gobi Desert of Xinjiang, special-shaped electroplated copper bolts are undergoing the dual tests of strong winds and salt and alkali. "Traditional steel bolts may rust and loosen within half a year, while custom-made special-shaped copper bolts, with their oxide protective layer, have three times the corrosion resistance of the former." " The technical director of the power accessory supplier in Handan, Hebei Province, introduced. ​
The advantages of this type of bolt stem from dual innovations: in terms of material, the resistivity of copper alloy is as low as 1.7×10⁻⁸Ω · m, ensuring stable conductivity in the grounding system; In terms of design, the shape can be customized according to the force-bearing points of the iron tower. For instance, a countersunk head structure can be adopted in a narrow junction box to avoid interference from tool operation. The patented products of Jingjiang Feitian Fasteners, through the design of sealing rings, achieve zero rainwater infiltration and have been applied in batches to wind power towers in the southern coastal areas. According to statistics, the market size of special-shaped copper bolts in the power sector will account for 22% in 2024, an increase of 15 percentage points compared to three years ago. ​
Electronic Manufacturing: The "Dual Role of Heat Conduction and Electrical Conduction" for Precision Equipment
In the RF components of 5G base stations, elliptical copper bolts are playing a crucial role. "The low-profile design of this bolt is 25% shorter than that of the hexagonal head, making it perfectly suitable for high-density circuit board layouts." " The test data presented by Li, an electronic component engineer, shows that the brass (H62) bolt not only has a conductivity of 58MS/m, but also its thermal conductivity of 386W/(m · K) can quickly dissipate the heat from the chip. ​
What is more worthy of attention is its anti-static and safety features. In semiconductor wafer equipment, custom hexagon socket copper bolts can prevent electrostatic discharge from damaging precision components. In medical equipment, beryllium bronze special-shaped bolts, with their non-magnetic characteristics, will not interfere with the operation of magnetic resonance devices. Data from 2024 shows that the manufacturing of electronic equipment has become the largest application field for special-shaped copper bolts, with a market size of 4.36 billion yuan. ​
Aerospace and High-End Machinery: "Customized Solutions for Extreme Scenarios"
Inside the aircraft engine compartment, custom-made copper bolts of 450mm in length firmly secure the turbine blades - this is a typical demand for irregular-shaped fasteners in the aerospace field. "Here, not only does it have to withstand a temperature of 500℃, but also weight reduction and energy consumption reduction are required. The high strength and lightweight characteristics of copper alloys are perfectly matched." " An aviation materials expert explained. ​
In civilian high-end equipment, such bolts are also indispensable: The bronze bolts of food processing equipment comply with FDA standards and can come into direct contact with food materials; The special-shaped copper bolts for chemical pipelines can operate stably in acidic and alkaline environments with a pH range of 2 to 12. The custom copper bolts of the ball mill, through a special thread design, increase the impact resistance of liner fixation by 40%. Industry comments point out that the ability to customize has become the core competitiveness of special-shaped copper bolts. Enterprises like Jingjiang Feitian are building technological barriers through patent layout. ​
Industry Upgrade: From "Standard Parts" to "Technology Carriers"
The value of irregular-shaped copper bolts has long surpassed their connecting function. A researcher from the China Fastener Industry Association stated that its integration of innovations in materials science and structural mechanics, such as the electrical conductivity of brass, the wear resistance of bronze, and the spatial adaptability of custom shapes, is driving the upgrading of downstream industries. Data shows that in 2024, the domestic market size of non-standard copper screws exceeded 12.8 billion yuan, with growth rates in high-end fields such as aerospace and medical care surpassing 8%. ​
With the advancement of Industry 4.0, experts predict that special-shaped copper bolts, which combine environmental protection attributes (with a copper recovery rate of nearly 80%) and functional diversity, will open up new tracks in fields such as new energy and intelligent equipment. This "revolution in fasteners" is tightening the "safety lock" for China's high-end manufacturing.