Do you understand hexagonal flange bolts?

Do you understand hexagonal flange bolts?

Hexagonal flange bolts are made of hexagonal head and flange, screw two parts of the integral bolt, and nuts used to fasten the connection of two through-hole parts.

Hexagonal flange bolts: hexagonal flange bolts by the hexagonal head and flange (hexagonal below the gasket and hexagonal fixed in one) and screw (cylinder with external thread) two parts of the integral bolt, need to cooperate with the nut, used to fasten the connection of the two through-hole parts, so the bolt connection belongs to the removable connection.

This kind of bolt is widely used in steel structure connections, and its performance grade can be divided into several grades according to different needs, such as 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9, and so on more than ten grades. The grade 8.8 and above bolts are made of low-carbon alloy or medium-carbon steel and are heat-treated (quenched and tempered), usually called high-strength bolts.

High-Strength Grade 8 Steel Flanged Hex Head Screws: Made from Grade 8 steel, these screws can be used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems. They are at least 25% stronger than medium-strength steel screws. The flange distributes pressure where the screw meets the surface, eliminating the need for a separate washer. The material meets SAE J429 specifications for quality. Dimensions meet IFI 111 specifications. Grade 8 steel hex head screws are marked with six radial lines. Head height includes the flange. Length is measured from under the flange.

Black-phosphate steel screws are mildly corrosion-resistant in dry environments. Zinc yellow-chromate plated steel screws resist corrosion in wet environments.

Match the thread spacing of mating components. Coarse threads are the industry standard; choose these screws if you don’t know the threads per inch. Fine threads are closely spaced to prevent loosening from vibration.

For high-quality Carbon Steel Flanged Hex Head Screws and professional technical support, don't hesitate to contact us at adelajonly@gmail.com or visit our website at [Juxin Fasteners]: https://www.juxinfasteners.com.

What are the characteristics of hexagonal flange bolts?

Ordinary bolts have thick nail heads, are difficult to deform, and are easy to loosen after tightening.

Compared with ordinary bolts, hexagonal flange bolts have a larger ratio of support area to stress area, higher preload, and better relaxation performance, with precise decoration, muscular endurance, and other characteristics. Hexagonal flange bolts-head more petite with holes, and with groove bolts, in the event of a slight deformation, can be locked more solid; flange according to industry needs, divided into the flat bottom and tooth shape, the latter is more able to play a role in fastening.

1. Simple structure: The hexagonal flange bolt structure is relatively simple and easy to process, manufacture, maintain, and replace. 2.

2. Stability: The bolt's interface joints are more stable, can withstand greater external vibration, and have a longer service life.

3. Easy to install: hexagonal flange bolts with a hexagonal head and body threaded structure are easy to fix to the connecting parts using pliers or wrenches.

4. Wide application: Hexagonal flange bolts are suitable for connecting flanges in various mechanical equipment, such as some vehicles and large mechanical equipment, and are widely used in various fields.

Why are hexagonal flange bolts hexagonal heads and not other shapes?

Many people will have the following question: Why are the bolts designed in hexagonal shape? And not others? Hexagon is the product of mutual compromise between side length and screwing angle.

The odd side length of the bolt means there will be two sides of the wrench that are not parallel to the phenomenon. Coupled with the very early only fork-shaped wrenches, the wrench head is mostly flared, and twisting the wrench is unsuitable for force. In addition, the screwing angle is also an essential factor to consider. If it is four angles, the wrench needs to be twisted 90 degrees to fix the screws, which is not conducive to the installation of narrow space; if it is octagonal or ten angles, the twisting angle is smaller, but the force is also small, easy to round. Therefore, a hexagonal shape is a more common choice for bolts.

1. the flange bolts must be placed on the flange holes before installing the flange ring to ensure each hole has a suitable bolt. 2.

2. before installing the flange ring, the flange bolts must be rotated back under the flange disk in the reverse direction before placing the flange disk over the flange bolts.

3. before installing the flange nut, the flange must be rotated 90 degrees to ensure that all flange holes are lined up.

4. Before installing the flange nut, it must be tightened in a sequence corresponding to the diagonal line, i.e., tighten hole #1 first, then tighten hole #4 to hole #1, then tighten holes #2 and #3.

5. Repeat until all flange nuts are tightened to standard torque.

Hexagonal flange bolts application fields

Hexagonal full-thread flange bolts are widely used in petroleum, chemical, electric power, metallurgy, shipping, pharmaceutical, and other industries. Especially in high-pressure, high-temperature, corrosive environments, the advantages of hexagonal full-thread flange bolts are more prominent. Flange bolts the hexagonal head and flange composition. Their "support area and stress area word ratio" is more significant than that of ordinary bolts so that this bolt can withstand higher preload; anti-loosening performance is also better and is widely used in automobile engines, heavy machinery, and other products. According to different places of use, hexagonal flange bolt type requirements are different. Generally speaking, hexagonal flange bolts are widely used in industrial and civil construction, cranes, excavators, and other heavy machinery. With the change in market demand, hexagonal flange bolts derive a variety of new varieties. Cross recessed concave protruding hexagon head bolts, hexagonal flange wood bolts, hexagonal flange triangular tooth self-locking bolts, hexagonal flange face self-tapping and self-drilling bolts, hexagonal flange face self-tapping and self-drilling bolts (coated + EPDM composite pads) and so on.