What is the difference between square bolts and ordinary bolts?

Square bolts are significantly different from ordinary bolts in many aspects. The following is a detailed comparison of the two.

1. Structural design

The unique feature of the square bolt is that it has a square neck. This design not only allows it to be stuck in the groove during installation to prevent the bolt from rotating, but also allows it to move parallel in the groove to ensure the stability of the connection. Common square neck bolts such as semi-circular head square neck bolts (DIN603 standard) can also provide effective fastening solutions in limited space with a certain aesthetic and anti-theft effect.

‌Ordinary bolts usually only include a head and a screw part with an external thread, without a square neck design. Ordinary bolts have various head shapes, such as hexagonal heads, round heads, etc., and are mainly used to connect two or more parts together through nuts.

2. Application scenarios

As square bolts have excellent anti-rotation performance and stability, square neck bolts are often used in connection scenarios that require high strength and stability, such as machinery manufacturing, transportation engineering, aerospace and other fields. Especially under dynamic load or vibration environment, square neck bolts can effectively prevent loosening and ensure the stability and safety of the connection.

Ordinary bolts have a wider range of applications, covering almost all areas that require bolt connection. However, in connections that require particularly high strength and stability, ordinary bolts may not meet the requirements.

3. Performance characteristics

The square neck design gives the bolts excellent anti-rotation performance and stability, making them an ideal choice for connecting parts. In addition, square neck bolts usually have high corrosion resistance and aesthetics to meet the use requirements in different environments.

The performance characteristics of ordinary bolts mainly depend on their materials and manufacturing processes. Generally speaking, ordinary bolts have low performance indicators such as hardness, strength, and tensile strength, which are suitable for general connection needs.

4. Material selection

Square bolts have a variety of material options, including high-strength alloy steel, stainless steel, etc., to meet the corrosion resistance and high strength requirements in different environments.

The material selection of ordinary bolts is relatively simple, and they are usually produced using ordinary screw wire, and their performance indicators such as hardness and strength are low.

In summary, square bolts and ordinary bolts are significantly different in terms of structural design, application scenarios, performance characteristics and material selection. When selecting bolts, the most suitable bolt type should be determined based on specific usage requirements and scenarios.