When it comes to choosing cap screws, Screw Distributors are suppliers of high quality fasteners. Additionally, our knowledgeability and experience in the fastener industry means we are also able to offer sound advice when it comes to choosing the right cap screws that meet your needs and specifications.

Deciding between flat head cap screws, hex head cap screws, or round socket cap screws is an endeavour that requires an understanding of what you intend to use them for. Expensive mistakes are commonplace, and more often than not, the reason is the wrong choice and application of fasteners. The frustrating hind sighted element of this is that a rudimentary knowledge of the different types of cap screws would easily prevent this setback from occurring.


Flat head cap screws are designed with a thin, level head. Their ideal application is when the fasteners that are bonding two object together need to lie level, or flush with the surface it’s screwed into. In other words, if the application requires that there are no protrusions on its surface, a flat head cap screw is the way to go.

As an example, an object that is regularly exposed to rough conditions, with scrapes being commonplace, is where a flat head cap screw would best be applied. Another example is an aircraft body, where protrusions on its surface would result in increase air resistance. In this case, a flat head is also the most useful.


Hex head cap screws are some of the more common types of cap screws available. Their name is self-explanatory, given that the head is hexagonal in shape. They are best used in heavy duty applications in which it is essential that an item remains screwed together, or for items that are exposed to considerable forces.

When purchasing hex head cap screws, it’s important to note the extent of the force that is likely to be applied to them, and presenting this information to the fastener supplier. They will likely be able to offer the best possible advice on what size would be appropriate for the application, as well as the optimal screw material.


Round socket head screws have a smooth, round head, as the name suggests. They are available in either “high” or “low”, referring to the size of the screw head itself. Naturally, the low head screws have a near flat head, while the high head screws are more protruding.

This screw has numerous applications, one of which being that they are useful in holding electronics together. They are also considered to be tough and durable, hence they can also be used as security fasteners.


Screw Distributors stock a range of cap screws, available for the applications described above, as well as many others. As well as this, we are also able to deliver directly to your chosen address.

For further queries regarding our fasteners, feel free to contact us.