Self-drilling screws are a special type of fastening. They are most often used in special cases, for example when hard and thick elements are to be connected to each other. What else should you know about such fasteners, and where do self-drilling screws prove useful?
What are self-drilling screws?
Self-drilling screws differ in their structure from standard fastenings. They consist of cylindrical or tapered, threaded shanks and heads with a groove, with which it is easier to place the fastener in the substrate. Such screws are made of high quality carbon or stainless steel (A2), and are usually galvanised against corrosion. The most often met self-drilling screws have got tapered, cylindrical, cup-shaped, washer-like or hexagonal heads. How do they differ from other fastenings? No holes need to be drilled during assembly works; with their profiled tips the screws penetrate the substrate themselves.
The application of self-drilling screws.
The application of these elements is determined by the specific type of the surface with which the elements integrate best. The following self-drilling screws for steel structures are most often used – their characteristic features and advantages are provided by www.rawlplug.pl. Steel is a very demanding material; therefore, fastenings in steel should be strong and durable in order to ensure the permanent connection of such elements.
Self-drilling screws are also used to connect wooden or even concrete surfaces. Thanks to such different applications, self-drilling screws have become almost universal fastenings.In addition, it is not necessary to drill holes before assembly with self-drilling screws, which is their unquestionable advantage. Self-drilling screws are used, for example, in the assembly of ventilation channels or in PVC throttle mechanisms.
The advantages of self-drilling screws.
Self-drilling screws greatly simplify and accelerate construction works. The screws are simple to use in assembly and also in disassembly works if any error in assembly has been identified or if a need has simply emerged to change something in a given design. The mounting of such screws does not result in many contaminations, either; the substrate remains clean during assembly works. The reliable connection of elements is also a great advantage of the screws. Thanks to such fastening systems the connection of elements is strong and, first of all, durable.
How to choose self-drilling screws.
There are numerous types of self-drilling screws available at DIY shops and markets. When it comes to their selection it is good to know their size and dimensions. Their length usually ranges between 9 and 25 mm. On top of that, some screws may additionally have a pressure collar with which the pressure force will be increased in the course of screwing in. Besides the collar, there are also other elements, such as washers or seals. While selecting appropriate self-drilling screws it is necessary to remember the type of substrate in which they are going to be used. It may turn out that different fastenings are suitable to connect metal elements, while other fastenings are proper for wooden or concrete surfaces.