Screws vs Bolts – What’s the Difference

differences between bolts and screws

Bolts and screws are different mechanical fasteners used to connect two or more components. Many believe a bolt and a screw are the same fastening hardware because they look and function similarly. Even with the naked eye, the difference between a bolt and a screw appears insignificant. However, there are distinctions between bolts and screws in engineering applications and understanding.

What is Bolt?

Bolt is a ride-hailing platform and electric scooter rental service owned by the Estonian company Bolt Technology OÜ. It connects customers with drivers who provide cars, motorcycles, or electric scooters for hire. It provides an alternative to traditional transportation solutions such as public transit and private taxis. Bolt works in over 100 cities worldwide, connecting millions of riders with reliable transportation options. The electric scooter rental service offers a convenient way to travel short distances in urban areas without owning a car or using public transport. The platform also features parking spots where riders can leave their rides when not using them, making it easier to get around town quickly and efficiently.

What is Screw?

A screw is a type of fastener consisting of a cylindrical helical shaft with threads that interlock when rotated, allowing one object to be rotated relative to another. It has many uses, such as in household appliances like light switches and door handles, industrial machinery such as engines and conveyors, and construction for assembling building components. The most common use for screws is fastening two objects together by placing the screw head into a pre-tapped hole or setting it against an unthreaded surface before tightening it firmly with a wrench or other tool.

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Difference Between Bolts and Screws

Bolts and screws are used to join two objects but are not the same. Bolts have external threads that require a nut for installation, whereas, with screws, the threads are on the inside of the fastener, so no extra hardware is needed. Screws tend to be smaller than bolts and don’t require a lot of torque for installation, while bolts need more torque to properly tighten them. In addition, bolts may have different head designs depending on their application, while most screw heads are similar in shape and size. Finally, when it comes to strength and durability under heavy loads or vibrations, bolts usually perform better than screws since their design allows them to spread out forces over larger areas compared to screws.


If you use screws or bolts, the idea is everything. Remember that bolts have much-holding power, whereas screws are in the middle. Screws are best suited for light to medium construction projects like fencing or framing. The bolts are ideal for your heavy-duty projects.

Furthermore, bolts perform better where the finished product is intended to be quickly installed and disassembled.


When budgeting a project, the cost is often a factor, especially if many fasteners are required. Although using bolts is more expensive, choosing the right fastener will save you money in the long run. If you must repair the project because you used the incorrect fastener for the material or application, going the cheaper route will not save you any money.


Bolts are typically constructed with partially threaded uniform cross-sections, whereas screws can have tapered shafts. As a result, the cross-section may vary depending on the length of the screws. Additionally, screws are threaded the entire length.

Clamping Power

The nut and bolt assembly exerts a strong clamping force, compressing the member in between. Screws, on the other hand, are used where a low clamping force is required.

Capability to Carry Loads

Bolted joints are extremely reliable. Bolts can support heavy loads. Larger-size bolts are used in the construction industry to increase load-carrying capabilities. Screws, on the other hand, have a lower load-carrying capacity and are unavailable in larger sizes. Screws have a moderate level of dependability.



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