Double headed bolt, also known as double headed bolt or double headed screw, is a cylindrical fastener with threads on both ends. Its main features and application scenarios are as follows:
main features
1. High connection strength: Due to the threads on both ends, it can provide a large clamping force to ensure the firmness of the connection.
2. Easy to install and disassemble: In some situations where it is difficult to directly connect with bolts, double headed bolts can be connected by first screwing in one end and then installing the nut, making the operation relatively convenient.
3. Adjustable: Different lengths of double headed bolts can be selected according to the thickness and installation requirements of the connecting components, with a certain degree of adjustability.
4. Wide applicability: Widely used in mechanical manufacturing, construction engineering, automobile manufacturing, shipbuilding, power, chemical, oil refining, valves and other fields, used to connect various materials and shapes of connected parts.
Structural characteristics
1. Two end threads: Both ends of the double headed stud have threads, which can be in the same or opposite direction, depending on specific requirements.
2. Non threaded in the middle: The middle part of a double headed stud usually has no threads and is a smooth cylindrical section called a smooth rod.
3. Diverse specifications: Double head bolts come in various sizes, with thread diameters typically ranging from M2 to M100 millimeters, and lengths can be customized according to user needs. Threads are divided into two types: coarse threads and fine threads. Coarse threads are represented by M and nominal diameter, while fine threads are represented by M and nominal diameter multiplied by pitch.
Materials and Surface Treatment
1. Common materials: Common materials for double headed bolts include carbon steel (such as Q235, 45 # steel, etc.), alloy steel, and stainless steel. Different materials have different mechanical properties and corrosion resistance, making them suitable for different working environments.
2. Surface treatment: In order to improve the corrosion resistance and aesthetics of double headed bolts, surface treatment is usually required. Common surface treatment methods include electroplating, blackening, oxidation, phosphating, and non electrolytic zinc coating treatment.
Application scenarios
1. Large equipment connection: Double headed bolts are commonly used to connect large equipment such as bridges, automobiles, mining machinery, boilers, etc. The accessories of these devices usually require frequent disassembly and replacement, and the use of double headed bolts can facilitate disassembly and installation.
2. Thick connectors: When the thickness of the connector is large and ordinary bolts cannot meet the connection requirements, double headed bolts can be used. One end of the double headed bolt is screwed into a thicker connector, and the other end is fastened to another connector with a nut.
Double headed bolts are important fasteners with high connection strength, easy installation and disassembly, strong adjustability, and wide applicability. In practical applications, it is necessary to select suitable double headed bolts according to the specific working environment and connection requirements
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