Application of industrial bolts and nuts in industries

Industrial bolts and nuts are used in various industries because they are supplied to market in different shapes, sizes and special grades with chemical and mechanical capabilities. Although metal welds are used to connect parts, you should know that metal bolts also play an important role in tightening metal structures and plates together.

If you use improper bolts to connect the plates together, you may face a lot of damage and costs. But if you increase your knowledge about the use of industrial bolts and nuts, you can prevent many unwanted costs, so in present article, we will describe and introduce different types of bolts.

 

 

One can even bravely claim that using industrial bolts and nuts have much more advantages than using welding metals. Welding is usually applied when the joints are permanent and do not require to be re-opened or re-closed.

When you use bolts to connect surfaces, making multiple holes on surfaces is inevitable. These holes will increase their strength and will minimize the tensions, such as, shear, torsion and tensile.

In which grades are industrial bolts and nuts made?

Low-grade iron grades and high-grade steel grades are commonly used to make bolts. Stainless steel and titanium are also the most common materials that play an important role in mechanical and chemical bolts and nuts. It should be noted that you can use these bolts in various industries.

The beads are usually made in circular shapes and there are various types available in market. The most common shapes are round and polygonal, and in fact, the nuts are auxiliary tools for screws that help them fit more firmly in place.

Types of industrial bolts

Master Bolt

In the past, we published a complete series of articles about the introduction of Master Bolt and its applications, but in order to get better acquainted with these types of industrial bolts and nuts, you should know that they are usually available in form of full thread, even they are available in large threads in market and industries. Different grades, such as, steel and stainless steel can be seen in industry and market. The most common use of master bolts is for industrial valves used in petrochemical, oil and gas industries, water and sewage, and for the connection of pipes and flanges. Bolts and nuts are sometimes used for domestic purposes and are used to connect cabinet doors, windows and entrance doors.

 

Allen screw

This type of screw is one of the most modern industrial bolts and nuts which has a function similar to hexagon bolts and nuts. Allen screws are usually available in plated forms in market.

Hexagon bolts

These types of bolts and nuts are the most widely used industrial bolts and nuts that are produced in various grades and materials, some of which are all thread types and some are semi-thread.

Metric screws.

This type of industrial bolts and nut is very similar to master bolts’ however, they are less sensitive than master bolts and are supplied to market in different grades of plated stainless steel. Sometimes we also see stainless steel in market, usually these screws are used in the construction industry and are used for the connection of metal plates and channels.

If you have ever looked closely at a screw, you have noticed that the screws have spirals on their body that are aimed for making connections. Most screws are made of metal. In terms of appearance, it can be said that the screws are made in round, hexagonal or square shapes.

Common materials for making industrial bolts and nuts

Screws are made by different materials; the most common materials include:

• Berenj
• Iron
• Steel
• stainless steel
• Plastic
• Copper
• Titanium
• aluminum

The spirals which are seen on the body of the screw are called threads. These grooves usually start from the top of the screw to the end. Of course, it should be noted that some screws are available in market in semi-thread forms. The grooves on the screws are sometimes semicircular, square, triangular and trapezoidal.

Usually, project managers and engineers pay a lot of attention to the design of the screws, and plating and galvanizing are important to them. Hexagon bolts are commonly used in heavy industries because they are highly strong and you do not need much force to turn the nut. These made hexagon bolts are one of the most widely used bolts in the industry.

Hexagon bolts

Common standards for making screws

Note that the resistance level or the class of each screw is different and you have to choose the appropriate washers or nuts accordingly. There are several standard examples for screws, among which we can mention the following:

• DIN
• ISO
• ANSI
• ASME
• EN
• ASTM

Learn more about hexagon bolts

Wrenches, adjustable spinners or screwdrivers are usually used to open and close the hexagon nuts, and are generally divided into two groups of large or small screw flowers.

Obviously, hexagonal nuts are also used for hexagon screws. Hexagon beads are divided in different categories, the most important of which are:

• Slotted hexagon nuts
• Long hexagon nuts
• Locked hexagon nuts
• Hexagon nuts with washers
• etc.

These nuts help make screws easier to use, and ultimately give you stronger connections and better performance.

Applications of various bolts and nuts in industry

Bolts and nuts have different applications. For example, elevator bolts are used for conveyors and elevators and are usually called large head bolts. Stone screws are used to build tunnels and fix walls, and hexagonal screws have different applications in industry and construction. If you have ever used Chicago bolts, you know that they are available in male and female forms in market and Chicago bolts are used to connect the sheets properly.

Shoulder screws are also suitable to use in twisting parts of pulleys and gears. Anchor screws are used for connections to concrete, and you can use a screw to prevent rotation. These types of screws have a round and smooth head.

It is important to know that screw eyes with a circular ring are used to hold the chains. U-screws are also used for surfaces with two holes and their connection is done by U-screws.

Heating procedure of bolts and nuts

It is necessary to get acquainted with the heating procedure of bolts and nuts. This operation indicates that it improves the performance of bolts mechanically. generally, all bolts and nuts are inspected and controlled during the heat treatment of bolts and nuts. They are taken and their quality is measured. By this operation, we will increase the endurance and resistance of bolts to strikes.

The use of bolts instead of other connection techniques, such as, welding has some advantages, such as, being less expensive, the possibility of installation in small space, and resistance to high temperatures. Of course, this method of connection also has some disadvantages, the most important of which is that if holes are improperly made on plates or constructions of the building, you will suffer a lot of damage.

What are self-tapping screws and automatic screws?

Self-tapping screws

Most screws need a drill bit to make good connections. But there are also some types of screws that do not require a pre-determined hole. Their sharp heads act like drills and can make strong connections without any need to nuts. It is important to know that these screws are called automatic screws in the industry.

Tighten the screws clockwise or counterclockwise.

The method of tightening the screws is usually in clockwise and anti-clockwise direction. Of course, we see in industry that some screws are twisted counterclockwise, but of course they have their own uses.

Prices of all types of bolts and nuts

The price of different types of bolts and nuts depends on various factors. It should be noted that titanium screws are more expensive than screws, such as, steel and stainless-steel screws. So, you need to be careful when choosing the type and application of each screw and when you buy what you need.