High strength black hexagonal cylindrical screws are widely used fasteners in various fields such as mechanical equipment, furniture, electronic devices, and automobiles. The following is a detailed introduction to this type of screw:
1, Characteristics
1. High strength: High strength black hexagonal cylindrical screws are usually made of low-carbon alloy steel or medium carbon steel, and undergo heat treatment processes such as quenching and tempering to achieve high strength grades. The common strength levels are 8.8, 10.9, and 12.9, with 12.9 being the highest strength level.
2. Corrosion resistance: The surface of the screw is treated with blackening to form a dense oxide film, which improves the corrosion resistance of the screw and enables it to be used for a long time in harsh environments.
3. Inner hexagon design: The screw head is designed as an inner hexagon, which facilitates the use of an inner hexagon wrench or electric tool for tightening or loosening operations, improving work efficiency.
4. Cylindrical head design: The screw head is cylindrical and can be used in narrow spaces without damaging the appearance of the installation surface.
2, Specification and Model
There are various specifications and models of high-strength black hexagonal cylindrical screws to meet the needs of different occasions. Common specifications include M2, M2.5, M3, M4, M5, M6, M8, M10, M12, etc., with lengths ranging from a few millimeters to tens of millimeters. In addition, special specifications and models of screws can be customized according to customer needs.
3, Application scenarios
1. Mechanical equipment: High strength black hexagonal cylindrical screws are widely used in the assembly and maintenance of mechanical equipment, such as cars, motorcycles, bicycles, machine tools, etc., to ensure the stability and safety of the equipment.
2. Furniture manufacturing: In furniture manufacturing, hexagonal socket head screws are commonly used for assembling furniture such as chairs, beds, tables, etc., to improve the structural strength and stability of furniture.
3. Electronic devices: In the assembly of electronic devices such as computers, mobile phones, televisions, etc., high-strength black hexagonal cylindrical screws can provide reliable connections and occupy less space in compact spaces.
4. Construction engineering: In construction engineering, high-strength black hexagonal cylindrical screws are used to connect large mechanical equipment such as steel structures and bridges, ensuring the stability and safety of the structure.
4, Precautions
1. Choose the appropriate strength grade: Choose the appropriate strength grade based on the usage scenario and stress situation to avoid insufficient strength or waste.
2. Correct tightening torque: Use appropriate tools to tighten screws with the correct tightening torque to avoid problems caused by over tightening or over loosening.
3. Anti loosening measures: In situations where anti loosening is required, measures such as adding spring washers and applying anti loosening glue can be taken to improve the anti loosening performance of screws.
5, Price and purchasing advice
The price of high-strength black hexagonal cylindrical screws varies depending on factors such as specifications, models, materials, and purchase quantities. Generally speaking, screws with larger specifications, higher strength grades, and better materials are more expensive. It is recommended to purchase from reputable hardware stores, e-commerce platforms, or brand websites to ensure product quality and after-sales service. When purchasing, you can choose the appropriate specifications and models according to specific needs
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