Flange Bolt

What is Flange Bolt? Uses, Dimensions and Types

Flange bolts are fasteners that feature a built-in washer-like flange, which distributes the load over a larger area. The flanged head of the bolt reduces the risk of damage to any surface it may come into contact with. These bolts are used in many different applications, so let’s take a closer look at what they are and how they are used.

What is Flange Bolt?

A flange bolt is simply a regular hex head bolt with an integrated washer-like flange on one end. This type of bolt is designed to distribute pressure evenly over a larger area than just the point where the head of the bolt meets the surface. It also has an increased surface area which helps to reduce slipping or wobbling when tightening or loosening it. A flange bolt can be made from various materials, such as stainless steel, brass, and aluminium alloy.

Flange Bolts Uses

Flange bolts have many uses in various industries and applications. They are often found in automotive and mechanical engineering applications, such as engines and transmissions, due to their ability to distribute pressure evenly over a wide area. In addition, they can be used in construction projects, plumbing fixtures, and even furniture assembly because they do not require additional washers or nuts for installation like other types of bolts do.

Flange Bolts Types

Flange bolts come in two main types: socket head cap screws and hex head screws. Socket head cap screws have a cylindrical body that fits into a socket wrench, while hex head screws feature a hexagonal shape for wrenches without sockets. Both types of flange bolts come in various sizes and thread pitches, depending on your application needs. Also, both types offer varying levels of corrosion resistance depending on their material composition; for example, stainless steel offers more corrosion resistance than aluminium alloy does.

Flange Bolt Dimensions

Nominal Pipe Size
NPS
(inches)
Flange Bolt Dimensions
Diameter of
Flange
(inches)
No.
of
Bolts
Diameter of
Bolts
(inches)
Diameter of
Bolt Holes
(inches)
Bolt
Circle
(inches)
1/4 3-3/8 4 1/2 0.62 2-1/4
1/2 3-1/2 4 1/2 0.62 2-3/8
3/4 3-7/8 4 1/2 0.62 2-3/4
1 4-1/4 4 1/2 0.62 3-1/8
1-1/4 4-5/8 4 1/2 0.62 3-1/2
1-1/2 5 4 1/2 0.62 3-7/8
2 6 4 5/8 0.75 4-3/4
2-1/2 7 4 5/8 0.75 5-1/2
3 7-1/2 4 5/8 0.75 6
3-1/2 8-1/2 8 5/8 0.75 7
4 9 8 5/8 0.75 7-1/2
5 10 8 3/4 0.88 8-1/2
6 11 8 3/4 0.88 9-1/2
8 13-1/2 8 3/4 0.88 11-3/4
10 16 12 7/8 1 14-1/4
12 19 12 7/8 1 17
14 21 12 1 1.12 18-3/4
16 23-1/2 16 1 1.12 21-1/4
18 25 16 1-1/8 1.25 22-3/4
20 27-1/2 20 1-1/8 1.25 25
24 32 20 1-1/4 1.38 29-1/2

Conclusion

Flange bolts are versatile fasteners that can be used in various industries for many different purposes. They feature an integral washer-like flange that helps to distribute pressure evenly over a larger area while also preventing damage to surfaces during installation or removal. There are two main types of flange bolts—socket head cap screws and hex head screws—which come in various sizes and thread pitches depending on your application needs; some materials offer more corrosion resistance than others do as well. All in all, if you need strong yet reliable fasteners for your project or application, then consider using flanged bolts!

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