Flange Bolts

Description

Flange bolts are a specialized type of fastener designed to provide a secure, uniform clamping force while simplifying assembly and improving load distribution.

A flange bolt is essentially a hex-head bolt that has an integrated washer-like flange beneath the head. This flange is typically circular and has a slightly larger diameter than the bolt head itself. The purpose of this built-in flange is to distribute the clamping load over a larger surface area, reducing the risk of damage to the bolted material and improving joint stability.

Flange bolts are designed to eliminate the need for separate washers, which simplifies assembly processes, reduces part counts, and enhances overall efficiency in fastening applications.

Design and Features of Flange bolts

The key design element of a flange bolt is the integral flange beneath the head. This flange acts like a washer by spreading the load and increasing the bearing surface. In many cases, the flange also has a serrated or knurled surface that bites into the material it fastens. These serrations provide resistance to loosening due to vibration and movement, making flange bolts an ideal choice for applications that experience dynamic loads, such as in engines or heavy machinery.

Flange bolts are available in different thread types, including coarse and fine threads, and they come in various materials, such as carbon steel, stainless steel, and alloy steel, depending on the requirements of the application. Some flange bolts are also coated with protective finishes like zinc plating, black oxide, or galvanization to enhance corrosion resistance and longevity.

Applications of Flange bolts

Flange bolts are used across a wide range of industries due to their ease of use and reliability. Some of the most common applications include:

1. Automotive Industry: Flange bolts are extensively used in automotive engines, transmissions, exhaust systems, and suspensions. Their ability to withstand vibration and provide uniform clamping makes them ideal for these applications.

2. Machinery and Equipment: Flange bolts are used in heavy machinery and industrial equipment where high-strength fastening is critical. The flange design helps distribute the load evenly across surfaces like machine casings, frames, and structural components.

3. Construction and Steel Structures: Flange bolts are employed in structural steel connections, flanged joints in piping systems, and heavy-duty construction where strong, stable fasteners are required.

4. Pipeline and Flange Connections: In piping systems, flange bolts are used to secure flanged pipe sections together. They ensure a tight, leak-free seal that can withstand internal pressure, thermal cycling, and vibration.

 

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