Dowel for concrete and brick wall: dimensions and installation

Installation of dowel nails using a special gun

All the previously described options for driving dowel fasteners imply that the nail is driven into the dowel. But there is another way to install the mount in question, which involves using a construction gun. This modern installation device allows you to “shoot” the structure being fixed to the base using a dowel-nail.

In this case, a special dowel fastener is used, which by and large does not involve the use of the dowel itself. The presence of a special washer on the nail ensures a tight fit of the fastener into the solid material.

The essence of the technology for operating the gun is that after shooting the dowel-nail, the washer on its tip moves to the head of the fastener and is tightly fixed there.

This dowel-nail is used when fastening metal structures to solid bases made of natural stone, concrete, steel with low carbon content, and brick. The gun and the described type of fastener are very often used when installing canopies on the balconies of buildings.

They produce “nails with washer” with a length of 30 to 80 millimeters, a cross-section of 4.5 and 3.7 millimeters from steel coated with zinc. It is extremely rare to find nails with a cross-section of more than 4.5 millimeters on sale.

I think you already understand how to use a dowel-nail. Humans do not encounter any particular difficulties with this fastener.

In this case, it is very important to choose the right type of fastener, since dowel-nails, which, for example, perfectly connect the surface and the concrete base, are absolutely not suitable for fastening chipboard or plasterboard

It is enough to contact the consultants (sellers) of a hardware store that sells various types of fasteners (for example, slate nails or finishing nails) to obtain comprehensive information about the types of dowel devices.

They will also advise you on how to use dowel nails. However, after carefully reading the article we have prepared, you will probably no longer need this information. You can easily mount fasteners into any type of surface without outside help!

Dowel nail

Needless to say, trying to hammer an ordinary nail into concrete is unlikely to be successful? To work with this dense building material, special nails made from special grades of steel are used. Also, nails for concrete, which are also called dowels, have a special shape - they are thicker than usual, have a massive head and, very often, a notch - longitudinal or spiral. Dowels for construction guns, produced in recent years, can also be equipped with a special ballistic tip, which facilitates the penetration of hardware into the thickness of dense material. Many types of dowel-nails are produced with a washer pressed onto the rod.

Depending on the shape of the working part, nails for driving into concrete and brick can be of the following varieties:

Grooved - for the heaviest concrete;
Flat – for fixing parts of small mass;
Round is the most common classic type;
Square - used when performing specialized work.

Hardened stainless steel is most often used as a material for dowel-nails, so corrosion is not a problem for such fasteners. Fastening using concrete nails is extremely durable, provided the installation technology is followed. A dowel hammered into a wall can perform its functions without reducing its load-bearing capacity for decades, even in the open air. It should also be mentioned that removing a nail, especially one hammered by mechanization, is a very difficult and time-consuming task. During dismantling, there are often cases of serious damage to the surface around the fastener, therefore, when choosing a place for the dowel, you need to be extremely careful.

Distinctive features of dowels for brick and concrete

A clear definition for fasteners is the fundamental principle that you will choose the right fastener and, accordingly, get the expected result after its installation. In practice, dowels for hard materials are not very advisable to use on brickwork. Moreover, if such a wall consists of bricks with voids inside. A fastener for concrete foundations is not at all what you need in this situation.

For such a base, there is a special dowel for bricks with voids inside; it has a special structure and, accordingly, installation specifics. First of all, it is an elongated plastic or metal bushing, the structure of which has a double thrust system mechanism. This design guarantees reliable fastening only for the reason that one of the spacers in any case ends up on a solid base, where it is fixed.

A threaded rod of the appropriate diameter, a self-tapping screw and other anchor fastening elements can be used as a rod, which plays the role of a spacer element. It all depends on what exactly you need to mount on the wall, and how much force a particular device will exert on the mount. Naturally, an important point before installation is the choice of the length of the fastening element. But you should not choose fasteners that are too long; in the future, difficulties may arise when installing the fastening device.

But the dowel-nail for concrete is technologically designed to work on a completely different principle. For example, in a hollow material it will never create a strong fastening connection, no matter how long we use it. The process of installing such fasteners itself involves driving it into the hole, which significantly speeds up installation work. In loose materials, using this technology, we will simply destroy the mounting hole and will not achieve high-quality fastening.

Alternative to plastic wall plugs

Most often, craftsmen use plastic fasteners for household work. They are easy to find at any hardware store. If you need a dowel at a certain moment, but you don’t have it at hand, you can make your own fasteners.

The simplest option is wooden blocks or matches, which are considered the predecessors of dowels. They are universal and can be used for all types of surfaces. The bars are easy to install yourself. Even such fasteners can withstand heavy loads. A prerequisite for this will be an accurate calculation of the configuration and selection of material. It is best to use hardwood. The diameter of the hole should be smaller than the chop. The dowel is driven in with hammer blows. If you incorrectly calculate the length of the dowel, you can cut it off with a sharp knife.

Wall dowels are considered popular products for creating strong and durable connections. You can choose the appropriate option based on the type of product, its weight and surface. The installation itself is quite simple, but requires care and compliance with the described rules.

What is a dowel-nail

A dowel-nail is a special product used to perform fastening work. It consists of two elements - a special nail and the dowel itself, and is used for mounting objects to concrete, brick, stone, and other solid, dense materials. There are also types of the described fasteners designed to work with chipboards and drywall.

The design of the dowel-nail is very simple. It is made in the form of a cylindrical rod, which consists of a spacer part (it expands during installation and allows for reliable fastening) and a nail that is familiar to everyone.

In some cases, the fastener we are interested in may be additionally equipped with a special cuff that acts as a limiter that does not allow the fastener to fall into the hole made. The shape of this cuff can be different, for example, cylindrical or hidden.

Also, modern industry produces dowel fasteners with a thread applied to the nail and a slot, which is located on the head of the product. This element can be mounted using a screwdriver. Working with it is quite simple, since the process of inserting a nail into a dowel is made easier due to the presence of a “smoothed” thread in the product. Let us add that the top of the thread of this mounting device is directed towards the head. Purely externally, the dowel-thread is no different from the standard thrust thread.

Most often, dowels are made from polyethylene, polypropylene or polyamide. But the dowel-nail itself is made from steel alloys with a zinc coating. To be fair, we note that there are many fasteners of the described type on the market without additional coating. Standard dowel diameters are 5, 6, 8 and 10 millimeters, and their length ranges from 30 to 160 millimeters.

Material for making dowels

Most dowels are made from polymer materials - polyethylene, polypropylene and polyamide. Such elements are characterized by high performance, availability, ease of installation (there is no need to make significant efforts to attach them) and low cost.

Common materials for making dowels are polyethylene, polypropylene and polyamide

Products made from polypropylene are hard, wear-resistant, and resistant to high temperatures. Such elements are intended exclusively for indoor installation, which is due to their sensitivity to sub-zero temperatures. During long-term operation with temperature fluctuations, deformation of the dowels and the appearance of cracks may occur.

Polyethylene dowels are characterized by low weight, ductility, ability to operate at low temperatures and low cost.

The most reliable and durable products are dowels made of polyamide or nylon. They are characterized by high wear resistance, resistance to mechanical stress and temperature changes.

Dowels can also be made of metal. For this purpose, stainless steel, galvanization, alloys based on bronze or brass are used. Iron dowels are distinguished by high strength qualities, rigidity, the ability to withstand large mechanical loads and durability without compromising the integrity of the structure.

Important! The surface of the metal dowels has a special galvanized coating that prevents the formation of corrosion.

Metal dowel

Dowel-nail how to use it when working with brick and concrete

If you are installing a fastener in a brick structure, you should follow these steps:

We choose the optimal place for the dowel (usually this is understood as the center of the brick).
Using an impact drill, we begin to drill into the material. This process must be performed very carefully (especially when starting drilling) so that the masonry does not crack under the influence of the tool. You can increase the speed of the drill after about 10 millimeters of brick have been drilled.
From the resulting hole, we blow out brick crumbs and the resulting dust with a vacuum cleaner, after which we boldly hammer in the fastener using a hammer.

When working with concrete surfaces, the fasteners are mounted as follows:

A hole is marked with a punch and a hammer. A hole of the required depth is punched (with a hammer drill). Please note - the marking of the dowel-nail, which indicates its cross-section, must coincide with the marking of the drill

It is also important that the length of the dowel is 5–6 mm shorter than the hole being punched. Using a vacuum cleaner, concrete dust is removed, and then the dowel cartridge is deepened with a hammer. After all these steps, the nail is driven in. It is advisable to leave 2-3 millimeters of free space from its head, which will be required for hanging.

Basics of secure fastening

By inserting itself into the concrete, the dowel-nail compacts it, due to which additional mechanical stress is created in the hole area. In addition, the frictional force that occurs when the dowel enters creates heat (the temperature reaches 900 ° C), due to which the material of the base and the body of the dowel sets. This combination of tension (thrust and compaction) of concrete and diffusion processes allows the dowel to be securely fixed in the base material.

The optimal penetration depth of the dowel, ensuring high quality of the connection, for building foundations made of concrete is 17-27 mm, brick - 25-40 mm, and for a steel base (usually up to 12 mm), the dowel must go through and come out at least by 5 mm. To meet these requirements, the dowels have high dynamic strength, longitudinal stability, hardness HR-Се 53–56 and high ductility.

How to drive a dowel nail into drywall, ceramic or tiles

When installing drywall, you should take into account in advance the weight of the load that is attached to it. In cases where the weight of the load is quite high, it is impossible to use a dowel fastener, since it will simply destroy a fairly light plasterboard surface. In other situations (light load weight), driving a dowel-nail is a very simple procedure:

a hole of the required cross-section is made in the drywall;
the fastener is inserted all the way into the hole (in this case, you should not hit the fastening element with a hammer with all your strength, but only lightly tap);
The screw is tightened manually or using a screwdriver.

When working with tiles made of tiles or ceramics, installation of fasteners is also simple, but the work should be done with extreme caution, given its high fragility. The fastening diagram is as follows:

a marker marks the point of entry of the fastener into the tile (this can be either a seam or the surface of the material);
Lightly tapping a metal screw using a self-tapping screw makes a hole on the surface of the enamel (up to 0.5 millimeters), and only after that use an impact drill, which drills through the tile (ceramics) to its entire thickness.

Do not forget that you will also need to make a hole under the tile in accordance with the instructions for brick or concrete (they are outlined above), and then install the fastening device into the tile and brick or concrete surface.

How to drive a massive nail into a plasterboard interior partition

Drywall is a soft material. It is important to ensure a reliable connection. To secure lightweight objects, use fasteners designed for this material. The workflow consists of three stages:

A mark is applied with a marker.
Use a drill to drill a hole of the required diameter.
Insert the fastening element. For reliability, glue is used.

Special fasteners for plasterboard profiles

Why do you need a dowel?

A dowel is a specialized fastener designed for installation and connection of various structures. There are a huge variety of different types of dowels, each of which is suitable for a particular material: concrete, stone, drywall, wood and others.

This fastening is most often used when there is no access to the edge of the connecting rod of a conventional screw. That is, when it is necessary to make a non-through hole, for example, to install a cabinet in the kitchen or a shelf in the living room. Also, dowels are ideal for hollow walls. Other fasteners in this situation will simply be ineffective.

The principle of operation of the dowel is very simple. A dowel is a kind of buffer between the self-tapping screw and the wall, fixing the entire structure due to the presence of special ribs and “hooks”. That is, it works like a spacer.

A dowel is a cylindrical rod made of polypropylene, nylon, polyethylene or even metal. Structurally, the dowel has two parts: an expansion one - it expands during installation, securely fastening into the working material, and also a non-expansion one. Some types of dowels are equipped with a limiter cuff that prevents them from falling into the drilled hole.

Features of using dowels

When choosing a dowel, it is not enough to focus on its shape; it is also important to know what size (length, diameter) to choose. For each working surface you need to select your own fasteners

The “six” dowel (6*40) is suitable for installing profile structures in cinder block houses. By choosing a different size, it will not be possible to make repairs, since all the fasteners will simply fall out of the drilled holes.

For panel houses (as well as those where there are no voids in the walls), the best option for dowels is 6*60 or 6*80. With them, everything will be securely fastened, nothing will fall through or fall out even on the ceiling.

When choosing the length of the dowel, it is worth remembering the load that the fastener will be subjected to in the future during operation. The shorter the dowel and self-tapping screw, the less load it will withstand. The diameter is also important. For ordinary housework (hanging a cabinet, mirror or wall unit), dowels with a diameter of 8-10 mm are sufficient.

The only difference is the depth of the hole being drilled, since the load on the dowel is different. For a cabinet, 3-5 cm is enough, and for a wall unit or a heavier cabinet or shelf - 8-10 cm. Another important question that arises before the master is what kind of drill is needed for the dowel.

To answer this, you first need to know what surface will be drilled and what load on the structure is planned in the future after the work is completed.

How to choose a drill for a dowel?

The most important rule is that the drill number must match the number (size) of the dowel. T

That is, ideally, the dowel should be difficult to hammer into the wall, otherwise, a situation is possible when the dowel simply falls out or fails. As for the quality of drills, experienced craftsmen advise using pobedit ones, since buying more expensive ones does not make much sense.

It’s easy to make a hole for a dowel (for example, let’s take dowel 10): First, take a smaller drill, for example a 8-piece. Make the hole slightly smaller in depth than necessary using the impact mode.

How to hammer dowels into a wall

1 Type of dowels
2 The process of hammering the dowel
3 Videos

When performing many repairs, it is often necessary to use dowels. When this part is driven into the wall surface, a reliable fastening unit is created that can withstand heavy loads. A correctly driven dowel is almost impossible to remove from the body of material in which it is fixed. Let's figure out how to drive dowels into a wall correctly.

Dowel fastener. Types of products

These products are divided into categories according to:

fastening method

The design features, as well as the base material, are taken into account. If the base is of high density, which causes certain difficulties in the process of fastening various elements, you should use dowels for brick or concrete

To work with such surfaces, you can choose: Expansion dowel. Depending on the manufacturer, the product may differ in shape, as well as in the number of teeth, ailerons, and spikes. Universal fastener. In solid materials it manifests itself in the same way as the spacer type, but in hollow materials it shows different qualities. Facade dowel and frame. The products are designed for fastening into dense bases, even if they are classified as slotted. Nail type. Designed for mass quick installation. Most often requires the use of a mounting gun. If the work will be carried out with loose or hollow materials, then in these cases it is better to choose a universal option, frame (can be used when installed in a foam concrete base during the installation of plastic door and window structures), driven (for aerated concrete), as well as screw-on, panel and sheet dowel.

type of installation

In this case, it is not the method of immersing nails into dowels that is taken into account, but the installation of the dowel itself. Today there are two methods: Pre-installation

The fasteners are fixed into the base. The attached element fits as tightly as possible to the “body”. The largest percentage of types of dowels work exactly according to the mentioned principle (universal, nail, spacer). Through installation. Before fastening into the base, the fastener must pass through a void area or a certain layer of intermediate material. To carry out this process, a product with an elongated non-expanding part is used. We are talking about frame, facade, and roofing dowels. In addition, there are models of fasteners for insulation. They can be either spacer or non-spacer. They are distinguished by the presence of a rather large cap (diameter - from 45 to 90 mm), which allows them to hold loose material, as well as soft ones.

material. Most often, dowel fasteners are made using plastic. This is explained by the fact that the level of installation strength is determined by the ease, as well as the force of deformation. Plastic is endowed with elasticity and viscosity, which allows it to deform more easily than other materials. At the same time, the plastic does not lose its characteristics. Thus, today there are dowels made from the following materials:
Polypropylene. It has high hardness and wear resistance, but cannot be used at very low temperatures. But it performs well at high temperatures (deformation is observed at +140 °C or more).
Nylon or polyamide. Products made from this material are endowed with a high level of rigidity and strength. They are resistant to mechanical stress and vibration processes, and are durable. A nylon dowel is recognized as a more reliable fastener, but it is not recommended to use it in frosty or humid weather.

Main types of dowels

Dowels are classified not only by the material used for their manufacture. They also differ in the installation method. One fastener can be installed into the created holes using only a hammer, while other dowels can be installed using only a special gun. This is exactly the tool that is used when deciding how to hammer a nail into a concrete wall.

When choosing dowels, you always pay attention to the material of the dowels. Plastic products are inexpensive. They are used when mounting non-heavy objects. For heavier structures, metal elements are used.

Plastic dowels Source tildacdn.com

On a note! Metal nails for concrete surfaces have a smooth surface. There is no thread on it. They are difficult to dismantle. They are used when it is necessary to perform fastenings for a long time.

Metal nails for concrete Source 9.allegroimg.com
Spacers are common fasteners. They have a cylindrical shape. They are driven into the created recesses. Often, the design of such fasteners contains spikes. They improve the reliability of fixation.

Dowel with a spacer structure, antennae and spikes Source dgural.ru

There is a fastener, the fixation of which is similar to the principle of operation of the “butterfly”. Such dowels are universal elements. Therefore, they are used in different designs. They seem to open up on each side.

A plastic sleeve that expands to the sides when a screw or self-tapping screw is tightened. Source wkret-met.com

Another type is façade fasteners. It is used when installing frame structures on walls. The facade fastening element has almost the same structure as the product in the spacer design. However, it is distinguished by its longer length and massive cap.

Facade extended dowel with spacer hardware Source a-krep.ru

Dowels are also made exclusively for aerated concrete. They are distinguished by the presence of wide threads. It is this that ensures their reliable fastening in a material with a porous structure. This fastener is designated by the abbreviation KVT.

Fasteners for lightweight concrete Source chelyabinsk.energogradek.ru

Manufacturers also suggest using plastic concrete dowels, used in polystyrene concrete blocks. This type of sleeve is not much different from spacer products. They have a spiral design. This dowel can withstand significant weight. It is often used during the installation of various cabinets, exhaust systems, for attaching shelves and many household items. The abbreviation GB is used to designate the product.

Fasteners for polystyrene concrete Source hubo.be

How to hammer a nail into a concrete wall without a hammer

Nails for aerated concrete or concrete differ significantly from products intended for fastening other bases. In order not to make a mistake when installing them, it is worth learning a little more about these rod elements.

Types of fasteners for concrete

Trying to hammer in an ordinary construction nail, it becomes obvious: the idea is bad - it does not go into the wall, but only bends. Classic wire hardware is made of low-carbon steel, which is characterized by low strength. In the case of elements intended to be embedded in concrete, the material used is distinctively different. Only high-carbon metal that has undergone heat treatment, that is, hardening, is used.

Related article: Do I need a primer before painting walls?

The fact that the nails are made of stainless hardened steel makes it unnecessary to cover them with a protective layer. However, in some situations it is important to use additional thickness.

traditional (simply hardened) – applicable for any external/internal work, with the exception of structures with excessively high humidity;
galvanized (minimum zinc layer 5-6 microns) – used in damp rooms and production facilities;
brass - have an aesthetic golden hue, the highest resistance to moisture and acids, they should be installed in places where exceptional anti-corrosion is required (for example, in shipbuilding).

The shape of the rod can be:

flat – suitable for holding lightweight structures;
round – standard option, capable of withstanding high loads;
square - in terms of functional qualities they are not inferior to “cylinder nails”, but have a different cross-section;
grooved - used when it comes to particularly dense material - heavy concrete.

Speaking about parameters such as weight, length, diameter, the range here is incredibly wide. Why is there no single standard size? For various designs, it is necessary to select elements of suitable sizes.

The classification according to the material from which the dowel is made deserves special attention. This spacer provides secure fastening of the nail and is usually made from:

plastics (polyamide, polyethylene, polypropylene);
metal

In the first case, it is a hollow cylindrical rod that expands from the middle during installation. The top is specially equipped with a cuff to avoid falling into the drilled hole. Fasteners of this type have threads on the surface, and their heads are characterized by the presence of a slot - a recess in the head. All this makes installation easy, even with the use of a screwdriver. You will find more recommendations on choosing dowels for a gas block in this article.

Unlike fasteners with plastic dowels, metal ones have a rod with a smooth surface, without threads. Expansion occurs when driven into the wall. The reverse process - dismantling - is quite complicated, so it requires long-term operation. They are important to use when working with very hard, solid materials.

A type of metal fasteners are those that require fixation using a pneumatic gun. Their base is a thick rod pointed at the end with an enlarged cap that prevents it from falling through. A lock washer is included in the package. Installation with a pneumatic gun is the fastest, least labor-intensive process necessary to create structures of the highest strength. However, such elements are not intended to be reposted.

Installation features

If you carefully study the technique, you can make high-quality fasteners on concrete at home. Naturally, it is not easy to do this if you do not have the proper experience, but there is a simple and effective method for installing dowels, which can be applied to brick structures. Installers of heavy structures successfully use this method.

To prepare, you will need some tools: a hammer drill, a drill for it, dry glue, a dowel. An electric drill may come in handy.

Dowel-nail installation diagram.
First you need to carefully drill a round hole (the size of the drill must match the size of the dowel fastener). Afterwards, you need to thoroughly clean the “hole” where pieces of material and construction dust could remain, and get rid of all kinds of obstacles that the dowel entering the hole may encounter. Then you should apply glue using either a nail or a long pencil, and after there is enough glue, insert the dowel. You need to wait about a day for the glue to set around the fastener.

When the glue dries, you need to start the actual installation. The fastener must fit snugly against the walls of the hole so that the bolt used for installation can be tightened with some effort. This guarantees the strength of this type of connection. A similar method of constructing fasteners is successfully used when working with other materials. For example, if metal dowels are glued to aerated concrete, they will hold on to this surface remarkably well.

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Classic dowels for concrete surfaces

Naturally, dowel fastening of various objects on concrete must be of high quality. The classic option is a plastic bushing with notches along the length and so-called “whiskers” used to prevent the fastener from turning through the hole. The main element of such fastening is a special rod, which contributes to the strength of the fastening in the wall, because when it is used, the bushing in the mounting hole expands. The classic mount is also quite easy to remove. The notches on the rod make it easier to unscrew with a screwdriver.

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Types of fasteners

Today there are various types of these fasteners, each of which differs not only in material, but also in the principle of fixation. Not long ago, such fasteners were cut from pieces of wood and inserted into the hole. Today, hardly anyone uses these products. After all, nowadays you can find dowels on sale for almost all occasions. The materials of modern fasteners are plastic and metal. Drive-in nylon dowels are most commonly used. Together with self-tapping screws, they are indispensable for working with any materials.

Let's look at some types of dowels available for sale today:

Dowel for concrete. To manufacture such a fastening element, polypropylene or nylon is used. These dowels are still well fixed to stone and brick. In addition to the fasteners themselves, self-tapping screws are required. For ease of work, you can use a dowel gun.

The material for the manufacture of dowels intended for sheets of plasterboard or gypsum fiber is usually metal (in rare cases, plastic). These same fasteners hold well in cellular concrete. The use of these dowels requires the presence of self-tapping screws and construction screws. Metal dowels for drywall are equipped with a tip in the form of a sharpened drill. Thanks to this, they can be installed even without holes in the work surface.

To fasten materials into concrete, expansion dowels made of polypropylene are often used. Such fasteners have special spacers in their design, which improve fixation during installation.
Mounting dowel made of polypropylene. It is better not to use it for exterior decoration because... the material used may crack at low temperatures. As for nylon fasteners, they can be used in almost any conditions.

Dowel nail. For its manufacture, nylon or polypropylene is similarly used. As for the nail itself, it is usually steel. For retention, it has knurling in the form of reverse cones. Such fasteners are used when it is necessary to secure baseboards, metal profiles, window openings, slats, lathing, boards. The dowel-nail usually fits well into a wall made of stone, brick and concrete. As a rule, these products are used when quick and extensive installation of small structures is required. Next you can see the dowel nail in the photo:

Frame dowel. Made from metal. It is actively used as fasteners for window and door openings. In addition, it is used if it is necessary to secure elements of the thermal insulation layer and sheathing through a layer of plaster. They can be called dowels for thermal insulation. There are two types of these fasteners. The former are used to work with hard materials, and the latter - with soft materials.

Wall dowel (otherwise known as façade dowel). The main materials for them are nylon or polypropylene. These fasteners can be used to attach anything to almost any wall. You just have to additionally purchase screws with a diameter of 4 to 18 mm. In addition, you need to make a hole in the wall in advance for a dowel of a suitable diameter. The fastener is held in the hole due to the presence of directed antennae.
There is also an adjusting metal dowel, which is used to secure the sheathing slats at a certain distance from the surface. This distance is required in order to make the sheathing after some time. Thanks to separable dowels and screws, you can change the position of the slats at your discretion.

Metal “butterflies” are ideal for mounting in various hollow structures. It is important that these fasteners can withstand quite heavy loads.
To fasten window and door openings, a universal nylon dowel is often used. It is also suitable for fixing metal sheathing and slats. In addition, this dowel is used to secure interior finishing elements such as suspended ceilings.
To fix the mineral wool insulation, a plastic dowel or special fasteners made of a plastic base are also used. The material is fixed using a metal nail. For this fastener, a hole must be made in the wall. Fastening is carried out on brick or concrete surfaces.

The spacer has been successfully used as fasteners on hollow blocks and solid materials such as brick and concrete. Fixation is carried out using special antennae. They securely hold the fastener and at the same time do not allow rotation in the hole.
Dowel screws for mounting guns. These fasteners differ from standard dowels with manual installation. In some cases it is preferable to use them.
Expandable construction dowel equipped with a locking edge. Nylon is used for its manufacture. These fasteners are used in the installation of various building structures. The presence of locking edges prevents the fastener from falling into the hole. Therefore, they are often used for outdoor work.

Dowels without edges are made of high quality polyamide. This type of fastener in its design has a hole, a stationary upper part and longitudinal jumpers. This design makes screwing the self-tapping screw as easy as possible. Thanks to the presence of a non-separable upper part, it is possible to prevent shedding and cracking of the facing plaster on the surface into which the dowel is screwed. Such fasteners are considered more durable.