All about dowels for hollow structures

Hollow Brick, MDF, Gypsum, Puzzle Plates have special properties, and when it is necessary to attach any design to them, a simple dowel cannot be achieved high-quality fasteners. Porous or hollow base does not allow you to withstand large mechanical loads. As a result, the self-tapping screw or other inappropriate fasteners can simply fly out of the nest, leaving behind a torn hole. In work with similar bases, use special fasteners – dowels for hollow structures.

Features and destination

The uniqueness of such a dowel is that it has a multisective structure of the sleeve. In the fasteners initially there is a metric carving screw and a head with a cross-shaped slot, ring and similar.

Dowel for hollow structures Easy to mount. This can be done with a screwdriver or mounting ticks. Due to use in hollow materials, fasteners have a large area of ​​revealed stubborn wings than the reliability of fixation is achieved. Provides reuse of the screw after it is extracted from a dowel. The remaining dowel does not lose fasteners.

Assortment of dowels for hollow walls has more than a dozen species. A non-specialist is difficult to make a choice, if he does not know what it is for him in a particular case.

Some of them require preliminary deployment, others have self-tapping type.

For hollow walls

Such a dowel is made of nylon, zinc alloy with aluminum, galvanized steel. Fastening technology, this is:

  • programmable deformation;
  • thread and programmable deformation;
  • Thread plus swivel element.

Some species can be reused, but most have one-time use.

To install a dowel with preliminary severity use drill (drill or screwdriver).

For a puzzle plate

This type of fasteners is also performed from metal or nylon, has a design of two parts – spacer and unspoken. The spacer changes the configuration during installation. Dowel of this kind may have a limitation in the form of a cylindrical cylindrical cuff, which will not allow him to fall into the hole. By way of installation, fasteners are divided into clogging and twisting. Dowels for PGP through-type have an elongated unspoken part. Position type are installed in the wall for the entire length.

Types of fastenings for a block of gas silicate, foam concrete and aerated concrete:

  • frame;
  • nylon;
  • plastic;
  • metal.

This choice allows you to apply a dowel in accordance with the upcoming load. For light designs, nylon or plastic will be the perfect choice. Heavy machinery and furniture are attached to metal dowels. This is the most durable and fireproof type of fastening.

Basically such fasteners have a protective cuff.

Review of species

The most common method of mounting the fasteners is fastening. When working with fiberboard or drywall plates, such a method is not suitable for other hollow materials. With plasterboard, the spacer technology will not work, and in the case of the PGP, you can miss and get into emptiness, and fixation will not happen. Therefore, they choose fasteners with the principle of action – fixing the form.

  • Metal Anchor Molly with Screw. Anchor is inserted into the knotted hole of the sleeve with slit petals, which are expanding when pulling the sleeve to the back surface of the panel.

  • Dowel-butterfly – polyamide and steel rod having metric threads. Petal screw spinning tighten and expand. The length of the screw allows the use of fasteners with thickened surfaces, with several sheets of drywall.

  • Dowel Fischer Pd It has a conical retire and attached to the PGP and panels. During screwing, the cone is tightened, and it is tightly “stuck”, at the same time expanding the petals. The choice in favor of this type of fasteners makes working with a sheet material from 6 mm.

  • Metal dowel for suspended structures – chandeliers, paintings, shelves, light wall cabinets and much more. Fastep according to the thickness of the material and the unspoken zone. Install with dumping or special ticks. Perhaps reuse. Consists of a collet with spacer and unspoken zones, as well as a screw with a metric carving, ring or semiring.

  • Special dowel. His appointment is a fastener of light structures in hollow bricks, porous concrete grounds. It has a polypropylene sleeve with a secret side, notches over the entire surface and spacer mustache. Metal nail has threads.

  • Dowel nail refers to special purpose dowels, used for fasteners of structures and items to full-scale materials – brick, concrete. Clogged not only in a dowel, but also directly to the base. More often used under the finish line for mounting auxiliary regions.


For high-quality installation it is necessary to choose fasteners of the correct sizes. Standard dimensions are 4, 5, 6, 8 mm. 10 mm fastener is used much less. The length of the product depends on the diameter: if with a diameter of 10 mm it is equal to 100 to 200 mm, then with a diameter of 6 mm, it will, respectively, will be from 35 to 80 mm. Each manufacturer has its own sizes, but the common values ​​are still available. They are shown in the table and will help to navigate the choice. In addition, the fastener was fixed firmly, its size should approach the size of the plate or brick.

Metal dowels with marking M6x52, M6x65 belong to fastening hardware. Their appointment is the installation of light structures, drywall, chipboard to full-fledged brick, wild stone and concrete. They have a restrictive side, sharp teeth and slit elements of the sleeve.


Experienced specialists use a proven installation method. Celebrate places of future holes under fasteners. Can do it with a handle or pencil. Then, with the help of the knife is on these marks, small deepening. They will help the drill do not jump from the mark. The diameter of the drill is selected in accuracy with a dowel diameter so that it is tightly entering the hole. Freely located fasteners – this is a sign of poor quality editing.

Similarly, the depth of the opening and the length of the fastener element must be approached, the same criteria are shown and dowel. Holding a drill at an angle of 90 degrees, on a low speed with an unstressed way to drill a depth of 1 cm. Then increase the rev. If the drill does not have a depth limiter, then on the drill itself put a mark of the desired length.

Ready hole blows, cleaning from dust and crumbs. The dowel is neatly clogged using a hammer as a shock tool. During the installation of the fastener element for mounted cabinets when screwing the bolt leave a gap in 2 mm. For other types of fasteners, shovel with a surface.

Compliance with all necessary conditions will allow you to spend high-quality and reliable installation of structures.

About what kind of dowel to use for the hollow brick, you can learn from the video below.

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