Bolts and screws look similar. They even have identical characteristics. That’s why many assume that they refer to the same fastening hardware. But if you look at them keenly, you will notice a clear difference between bolt and Screw. They are two unique fasteners manufacturers with different and individual application.

Do you seek to know the difference between bolt and Screw or nuts? Get on board by going through this article. You will note the critical difference between the two types of fasteners that sets them apart. If you know the difference between bolt and Screw, it will be easy to pick the right option based on the intended application.
Different types of fasteners make every part that surrounds you. It may be a motorcycle, mobile car, and even your laptop. Even giant automobiles like rockets, tanks, and airplanes, you will never fail to find industrial fasteners like screws, bolts, and nuts.
Even yourself, you have interacted with different types of fasteners. But you may not have taken an interest to know the difference between bolt and Screw. The table you use, the seat you have always sat on, and various items you use daily have made of bolts, screws, and nuts.

Before getting the difference between bolt and Screw, it is vital to understand what the two are.

What is bolt?

difference between bolt and screw-What is bolt

It’s among the types of fasteners that have a threaded shaft. If you have two parts of a given material with aligned holes and you seek to join them, bolts are the best industrial fasteners to use for that purpose. They will provide better holding strength if you compare them with other types of fasteners.

The threads of the bolts are what gives them an unmatched level of holding power. But you will need a washer and nuts to install them. Do you seek to buy bolts? Ensure you get them from known industrial fasteners manufacturers to avoid the low quality industrial fasteners. That’s why Kaloti india will be your best choice supplier if you want quality and durable types of fasteners.
For all industrial fasteners manufacturers, you will visit, ensure the difference between bolt and Screw if they are types of fasteners you want to buy. Below are the different types of bolts you will find in the market.

Types of bolts

1. Anchor bolts

It’s among the types of industrial fasteners that allow you to attach objects to concrete. You are required to place the bolt head in the concrete before it has cured so that the threading head of your fastener is visible and ready for use.

2. Carriage bolts

They possess a smooth rounded head and a square section to keep the bolt against turning. Carriage bolts also have a threaded part using a nut. You can use them to fix metal to wood.

3. Hex bolts

They are a popular form of bolts. You can get them in metric sizes and standard dimensional inches.

4. Round Head Bolts

They are industrial fasteners that appear Similar to carriage bolts but don’t have square taper beneath the domed bolt head. You can apply them to join wood.

5. U-Bolts

These are types of fasteners with the shape of a U letter. They have a threaded section on each end. You are supposed to mount attachment nuts and plate bracket the threaded ends when fastening materials using this tool.

What is a Nut?

difference between bolt and screw-types of nuts

Nuts are industrial fasteners with a threaded hole. You can attach them to bolts, screws, or studs to offer holding force and thwart axial movement. A good example is where you insert a bolt through two parts that have aligned holes. Then you screw a nut onto the bolt. The bolt’s shaft will help to prevent radial movement of those parts. On the other side, the bolt’s head and the nut will help eliminate any axial motion.

Types of Nuts

You will find nuts in a variety of threat patterns, materials, sizes, and shapes. The choice of nut you wake will constraint the materials where you are going to use the nut. But ensure to look at the size and threading of the nut. That way, you will be able to select nut head shape and the material suitable for your application.

Here are the types of nuts fasteners industrial make.

1. Locknuts

Do you seek to buy lock nuts? You will get them in a wide range of shapes. You can use them to secure other nuts. Besides, they are good to use if you want to prevent other nuts from becoming loose. There are different types of lock nuts, including nylon inserts, serrated hex flange, and metal locknuts.

2. Coupling nuts

It is a long and cylindrical nut used to join two male threads. You can also use it to add length to an installation.

3. Flange nuts

These features around the flange. They act as external washers. Flange nuts allow more even load distribution.

4. Hex nuts

They are hexagonal. Hex nuts are versatile and require a wrench for installation. There are different types of hex nuts. They include slotted hex, heavy, hex jam, hex flange, semi-finished hex, and finished hex.

4. Wheel nuts

There is a wide range of wheel nuts. They have applied in automotive while applications.


What are Screws?

difference between bolt and screw-what are screws

They are part of mechanical industrial fasteners with a threaded shaft. You can use them to screw into the material you want to fasten. They include self-tapping screws and wood screws. The tapered shaft in screws has sharp threads meant to cut the mating thread in the material you seek to fasten. They also include machine screws which resemble bolts. But they got their whole shaft threaded.

Different types of screws

1. Wood Screw

It is a prevalent type of Screw. They are not made of wood even though they are called wood screws. If you seek to join two or more wooden parts, this will be the best type of fastener to use. They have a sharp point you can use to dig into the wood. They are appropriate types of self tapping screws to use in woodwork applications.

2. Lag Screw

They are also called coach bolts or lag bolts. They are jumbo-sized and coated in zinc. The zinc layer helps to prevent these screws from rusting and corrosion.

3. Twinfast Screw

These are unique bolt vs nut screws with two threads instead of one. Their two thread nature makes it easy for you to drive them into an object faster than traditional screws. You can use them for hanging drywall and installation.

4. Security Screw

They have been made to protect against tampering or removal. Compared to other self-tapping screws, this one has no head that you can operate if you seek to reverse and remove it from joined parts. But in case you want to remove it, you will require specialized tools such as a square driver or a spanner. That’s why they are suitable industrial fasteners for security applications.

Difference Between Bolt And Screw


• Industrial fasteners manufacturers only produce small and large-sized bolts.
• Bolts are more reliable.
• If you join parts using bolts, they will have greater strength compared to screws.
• Bolts don’t have a tapered shank.
• Bolts have a spiral thread structure.
• You will find bolts with a uniform cross-section.


1. You will not find screws in larger sizes. They are smaller or of medium size. That’s a notable difference between bolt and Screw since bolts are available in small and larger sizes.
2. Screws are among the less reliable industrial fasteners.
3. If you join parts using screws, they will have less strength compared to bolts.
4. Screws have pointed or tapered shank.
5. Screws have helical structure threads.
6. The cross-section of the Screw is non-uniform.



While numerous times people assume no difference between bolt and Screw, that difference exists. Any time you go to artificial fasteners manufacturers or distributors dealing with different types of fasteners, insure to ask the nut and bolt difference before buying. Through continuous durability and invention, we seek in-depth cooperation with guests and make a better future grounded on equality and collaborative benefit. Kaloti Group focuses on erecting long-term connections with its guests.