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What are the Different Types of Flange Screws?

Flange screws, also known as OEM/ODM flange bolts, are widely used in various industries for their unique design and functionality. These screws come in different types depending on their specific applications and requirements. Let's explore some of the most common types of flange screws:

1. Hex Flange Bolts: Hex OEM/ODM flange bolts are the most commonly used type of flange screws. They have a hexagonal head that allows for easy tightening with a wrench or socket. The flange on these bolts acts as a built-in washer, providing additional support and distributing the load evenly.

2. Torx Flange Bolts: Torx OEM/ODM flange bolts feature a star-shaped head with a built-in flange. The Torx design provides improved torque transmission and reduces the risk of cam-out or stripping. These bolts are commonly used in electronics, automotive, and aerospace industries.

3. Slotted OEM/ODM flange bolts: Slotted flange bolts have a slotted head that can be tightened or loosened using a flathead screwdriver. The flange under the head provides stability and prevents the bolt from rotating during installation.

4. Socket OEM/ODM flange bolts: Socket flange bolts have a cylindrical head with an internal socket for turning the bolt. These bolts are commonly used in applications where a low-profile head is required, and access is limited.

5. Shoulder Flange Bolts: Shoulder flange bolts have a smooth cylindrical shoulder between the head and the threaded portion. The shoulder acts as a bearing surface, reducing the stress concentration and providing better load distribution.

6. Button OEM/ODM flange bolts: Button flange bolts have a rounded, dome-shaped head with a built-in flange. These bolts are used in applications where a smooth and aesthetically pleasing finish is desired.

How to Choose Bolts for Flanges?

Choosing the right bolts for flanges is crucial for ensuring a secure and reliable connection. Here are some factors to consider when selecting bolts for flanges:

1. Material: It is important to choose bolts made from a material that can withstand the intended operating conditions. Common materials include stainless steel for corrosion resistance, carbon steel for strength, and alloy steel for high-temperature applications.

2. Bolt Grade: Bolts come in different grades, which indicate their strength and performance capabilities. Common grade classifications include grade 2, grade 5, and grade 8. Higher-grade bolts offer increased strength and durability but may also come at a higher cost.

3. Size and Length: The size and length of the bolts should match the flange specifications. It is important to ensure that the bolts have the correct diameter, thread pitch, and length to securely fasten the flange assembly.

4. Flange Design: Consider the type of flange being used and its design requirements. Different flange designs may require specific bolt types, such as hex OEM/ODM flange bolts or socket OEM/ODM flange bolts. Additionally, the flange design may specify the number and spacing of the bolts required.

5. Load Capacity: Determine the load capacity or strength requirements of the application. The bolts selected should be able to handle the expected load without the risk of failure or loosening.

6. Environment: Consider the environmental conditions the bolts will be subjected to. Factors such as temperature, moisture, chemicals, and vibration can affect the performance and durability of the bolts. Choose bolts that are suitable for the specific environmental conditions.

In conclusion, flange screws or OEM/ODM flange bolts are available in various types to suit different applications. When choosing bolts for flanges, it is essential to consider factors such as material, grade, size, flange design, load capacity, and environmental conditions to ensure a secure and reliable connection. By carefully selecting the right bolts, you can ensure the longevity and performance of your flange assemblies.