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Fasteners
As one of the most common fasteners, the head shape of bolts plays a key role in different application scenarios. Whether in the assembly of mechanical equipment or the fixing of building structures, the choice of bolt head is directly related to the stability, use effect and safety of the connection. Common bolt head shapes include cylindrical head, flat round head, pan head and countersunk head.
Hexagonal Flange Bolt
Features:
Hexagonal flange bolts consist of a screw, a nut and a flange surface. One end of the screw is threaded, and the other end is connected to a flange surface with a larger diameter. The design of the flange surface increases the contact area, thereby increasing the friction between the bolt and the connected object and enhancing the tightening effect. The nut is usually hexagonal in design, which is convenient for tightening or loosening with tools such as wrenches.
Application scenarios:
Hexagonal flange bolts are widely used in various industrial fields due to their unique design and excellent mechanical properties, including heavy machinery, building structures, automotive industry, and aerospace, etc.
Countersunk Bolts
Features:
The head of the countersunk bolt is designed to be flat or slightly concave, so that the bolt can be completely embedded in the surface of the workpiece and flush with the surface of the workpiece after installation without any protruding parts.
Application scenarios:
Countersunk bolts are often used in situations where smooth surfaces are required, such as aircraft, building curtain walls, furniture and mechanical equipment. Since the countersunk bolt does not protrude from the surface after installation, it is widely used in applications that require high aesthetics and cannot have any protrusions, such as wood or metal structure connections.
Pan head bolt
Features:
The head of the pan head bolt is flat and slightly raised, presenting a "plate" shape. Compared with the flat round head, the head of the pan head bolt is slightly thicker and can provide greater tightening force.
Application scenarios:
Pan head bolts are widely used in electronic products, furniture assembly and mechanical structures, especially in those occasions where high-strength tightening is required but the bolt head is not expected to protrude too much. For example, pan head bolts are very common in some metal sheet connections or plastic parts assembly.
Cylindrical head bolt
Features:
The head of the cylindrical head bolt is cylindrical, with a smooth surface and good force-bearing performance. Usually in structural design, cylindrical head bolts are used in situations where there are high requirements for the appearance of the head and ease of operation.
Application scenarios:
Cylinder head bolts are commonly found in mechanical equipment, electronic products, and mold manufacturing, and are suitable for situations that require higher torque. Its smooth head is easy to tighten with a wrench or power tool, and is very suitable for applications with small spaces but high-precision operations.
The Importance of Selecting Bolt Heads
Different shapes of bolt heads directly affect the force-bearing mode, installation method and appearance of the bolts. Correctly selecting the shape of the bolt head can not only improve the firmness of the connecting parts, but also improve the safety and durability of the entire structure.
Use effect
By selecting the appropriate bolt head shape according to the specific scenario, you can ensure the best fastening effect and aesthetics during use.
Safety
Choosing the right head shape can effectively reduce safety hazards, such as reducing the risks brought by surface protrusions and improving the stability of the connection.
Hangzhou Jiangxin is a national high-tech enterprise and a Zhejiang science and technology enterprise. It is a professional fastener manufacturer integrating production, research and development, and sales. The company has ISO 9001 and IATF 16949 certifications, and has ERP and MES auxiliary production management systems. In terms of product supply and demand, our factory's non-standard customization accounts for a high proportion. At present, the product specifications involved in non-standard customized production and sales have reached more than 10,000.
Business scope: bolts (external hexagon bolts, internal hexagon bolts, carriage bolts, flange bolts, etc.), screws (machine screws, self-drilling screws, set screws, 12.9 grade plug screws, hexagonal wood screws, self-tapping screws), nuts (hexagonal nuts, K-caps, nylon, stamped metal self-locking nuts, hexagonal flange nuts, cap nuts, rivet nut series, etc.), others (semi-tubular rivets, step rivets and various non-standard fasteners).
