Special purpose fasteners are used to connect various designs, as well as in complex mechanisms where standard fastening elements are not suitable. They are made from high quality solid steel that can withstand high mechanical loads. Special fasteners, like regular fasteners, have threads made in metric or inch format.

What kind of special fasteners are there?

In fact, there are not so many special fastening elements. All available products can be divided into two categories - rigid fixation and rigging.

Rigid fixation elements are used to connect stationary products, and rigging elements are used to secure cables or ropes. Special fasteners are presented on the market in a wide range of different variations that have the simplest design, but differs in dimensions and other things essential characteristics, which allows you to group them into categories.

Rigid fixation fastener

Rigid fixation fasteners include only three categories of products:

• Hairpins.
• Fitting.
• Lugs.

Hairpin

A hairpin is a metal rod with a thread. Such fasteners happen various sizes and is made from metals with wide range hardness, therefore differs in physical and mechanical properties. Large studs are used for foundation works. With their help it is attached metal carcass to concrete, and also the stands of advertising billboards are fixed to the blocks. There are only two main categories of studs:

• With double-sided thread.
• Full threaded.

Double sided The studs have a clean area in the center without threads. There is a right-hand thread on one end of the stud, and a left-hand thread on the other. This design is often used to mount the cylinder head in a car. Part of the fastener is screwed into aluminum block engine, and a head is threaded onto the free end, which is clamped with nuts.

Full threaded The studs have one type of thread that runs from edge to edge. You can screw a nut onto them and scroll along the entire length. Classic threaded clamps work on this principle. Such studs are widely used in construction to create various structures. In particular, they are used for installing sandwich panels, etc.

Union

A fitting is a common special fastener that is used to connect pipes to pipes or hoses. The main condition is the presence of threads on at least one element. They are usually used in water and gas pipelines. Also, household appliances that use water or gas are connected using fittings. There are fittings on washing machines and dishwashers, gas stoves, boilers, etc.

There are four categories of fittings:

• Connecting.
• Welded.
• Rotary.
• Transitional.

Connective The fitting is a metal tube of various lengths, on both ends of which an external thread is knurled. The fitting is inserted between two pipes with prepared internal threads and screwed onto them. Since the threads are opposite, when the fitting is turned it enters both ends of the pipes simultaneously. In its center there is a groove for a wrench. There are also fittings with internal threads, which, on the contrary, are screwed onto the tubes.

Welded The fitting is a metal tube, on outside one of the ends of which is threaded. The clean edge is welded to the pipe, which has no threads, using electric welding. Another threaded pipe is screwed onto the second end of the fastener. Using such an element allows you to make a water or gas branch, or simply extend the pipe. Often such fasteners are not metric, but inch thread, which is used in engineering systems.

Turning the fitting has a movable design that allows the flange intended for mounting the hose to rotate. The use of such fasteners is very convenient in cases where it is not desirable to allow the hose to be screwed in when twisting the fitting.

Transitional The fitting is almost the same special fastener as the connecting one, but with a slight difference. Its ends have different diameters. This makes it possible to connect pipes of different thicknesses.

Lugs

The boss is a similar design to the connecting fitting, but still has some differences. It is a tall nut that is screwed onto a tube - for example, to connect measuring equipment such as a pressure gauge. There is a hexagonal groove along the entire surface of the boss for tightening wrench. The connection thread is located inside the tube. Diameter of outlet holes with different sides fasteners may vary. The thread for connecting to the pipe is often made in inch format, and for the pressure gauge in metric. The bosses are made from of stainless steel, or copper alloys.

Rigging fasteners

Special rigging fasteners are more diverse than classic ones:

• Brace.
• Lanyards.
• Carbines.
• Hooks.
• Clamps.
• Koushi.
• Blocks.
• Swivels.
• Eye nuts and bolts.

Bracket It is a curved rod, the edges of which are connected with a pin or a transverse bolt and nut. This is a very common fastener that allows you to reliably connect the cable to various supports. It is made of solid steel and coated with a layer of zinc. There are both small staples and quite large ones.

Lanyard is a screw tie that allows you to create a strong tension with minimal effort when rotating. This element is a frame or ring into the body of which metal rods are screwed. One of them ends with a hook, and the second with a ring. When the frame rotates, the rods are screwed inward, which creates tension. This is a reusable system that can work just as well as a hydraulic jack, but for pulling, not lifting.

Carbine is an element for quickly connecting chains and cables. It is a metal rod bent and connected at its ends, at one end of which there is a special spring mechanism that holds a removable segment. By moving the segment aside, you can insert a cable ring or chain link inside the carabiner.

Hook It is a metal rod, one end of which has a thread, and the other is unscrewed into a semi-ring. He screws himself in various materials, such as wood or dowel, and holds suspended elements. There are also designs in which a ring is used instead of a hook. Such special fasteners must be used with caution, since the hook can bend under the influence of heavy weight.

Rope clamp It is a metal plate into which a rod bent in the form of a bracket is inserted. Nuts are screwed on its ends. The clamp allows you to create a reliable cable loop that will not break. It is enough to insert the doubled cable into the holes of the clamp and tighten the bolts.

Koushi They are an insert made of a metal rod bent in the shape of a triangle or drop. They are used to increase the bend radius when creating cable knots. Thimbles are an alternative to clamps in creating loops. They are cheaper and, when knotted correctly, provide a stronger connection. Their only drawback is that you need to use quite a lot of cable to prepare the knot. Often thimbles are used in conjunction with clamps when guaranteed strength is needed.

Block is a special fastener that is used for lifting operations. Its design includes a pulley into which a cable or rope can be inserted. By obtaining an axis of rotation, it is easier to apply effort to lift weights.

Depending on the design, the block can be solid or folding. If it is solid, then to carry out the work it is necessary to first insert the end of the cable like a thread into the eye of a needle. IN folding design everything is much simpler. On its side there is a special segment that can be moved aside to wind a rope or cable without having to look for the end, which is especially convenient if a long coil is used.

Swivel It is a steel ring with a metal rod inserted into its side hole, with a small ring at the end. Using a swivel helps prevent the cable or rope from twisting. This fastening element allows you to extend the service life of the used coil and dampen swaying. When the cable is unscrewed, the swivel simply turns, thereby compensating for such actions and preventing it from breaking. Similar to a rigging swivel, but in miniature, you can find it on dog walking leashes and bags. The swivel is also used in fishing gear.

Eye bolts and eye nuts They are a bolt or nut to which a ring is welded. This design has much in common with a rigging hook, but is more reliable. All its elements are firmly welded together. This eliminates the bend from straightening out, which is a common hook problem. Eye nuts and bolts come in a variety of sizes. They are always made only from steel.

Without reliable fasteners, it is impossible to build a house or renovate an apartment yourself, or with help. You won't be able to attach a rafter to a beam, you won't be able to hang a shelf, you'll never be able to assemble furniture. Here is an incomplete list of what you cannot do without having a nail, screw, self-tapping screw or bolt at hand. Many will say, what will this article be about if you just listed all the popular fasteners. In principle, all that remains is to add anchors, rivets, dowels, confirmations and screws. That's all, in fact, these are just names of hardware, and fasteners have a slightly different classification.

Most likely, this concept was invented artificially in order to combine all the details that can be used to connect various building elements and.

This group of fasteners includes screws, self-tapping screws, nails, dowels, etc. There are also types of construction fasteners, namely dowels, anchors, metric products and self-tapping screws.

Stainless steel fasteners stand out as a separate group. As a rule, it is manufactured according to the DIN standard (Germany). Such fasteners have an almost unlimited service life, since they are not exposed to precipitation and are quite resistant to chemical reagents. Moreover, the aesthetic appearance of this fastener will not be spoiled.

If there is a need for reliable fastening anything, then anchors will come to the rescue. An anchor is special kind fastener consisting of two parts, a pin or core and a sleeve. Application anchor fasteners not regulated, but, as a rule, builders use anchors for greater reliability of fastening. So, if you need to secure a heavy element to a hollow base or concrete, then an anchor is perhaps the only way to do this. You can often see the use of anchors when PVC installation windows Depending on the problem that needs to be solved with the help of an anchor, the necessary or most suitable anchor is selected - a frame anchor, an anchor with a hook, a driven anchor, an anchor with a ring and an anchor bolt.

There are also dowels that have the same purpose as an anchor, but are used for lighter loads.

Chemical anchors stand in a separate group - these are devices that are structurally different from the classic anchor. A chemical anchor is more of a method of attaching a pin to a base. As a rule, such anchors are used when maximum loads, which ordinary anchors cannot withstand. To secure the anchor, a hole of the required diameter and depth is made. The dimensions of the holes are strictly regulated by the manufacturer of the chemical anchor. Then, using a special gun, a certain amount of chemical glue is placed into the hole, then the anchor itself is inserted into the hole filled with glue. As a result chemical reaction glue with the base and body of the anchor, mutual penetration of one into the other occurs. The end result is a permanent connection that can withstand enormous shear, torsion and bending loads.

High strength fasteners

By and large, anchor fasteners can be classified in this group. However, it all depends on the grade of steel used and production technology. Required mechanical properties of high-strength fasteners class 8.8. 10.9 and 12.9 is achieved by sequential heat treatment, a combination of heating and cooling (quenching and tempering). Also, high-strength fasteners have greater resistance to precipitation, chemical exposure compared to usual.

Inch fasteners

In English-speaking countries - Great Britain, Australia, and the USA - inch fasteners with threads of various pitches (large - UNC and small UNF) are widely used. The only difference between this fastener and the metric one is that the unit of measurement is inch, not mm. Those. We receive fasteners that meet the standards of the countries listed above.

Almost all of its types listed above can be safely classified as furniture fasteners. There are also nails, bolts, and screws. Only screeds are specifically used. This compound is not used anywhere else except in furniture production.

Welded fasteners

This type of fastener is used for various technologies welding Structurally, nails, bolts, bushings, and threaded rods are used for welding.

Brass fasteners

The main advantage of this fastener is its low cost compared to stainless steel fasteners. At the same time, the products withstand aggressive influences much better external environment. In addition, like stainless steel fasteners, brass has the same decorative qualities. It is also worth noting the absence of magnetization, as a consequence, the absence of interference when used in electronic devices.

A special group stands out for rigging fasteners. This is a fastener that is used for rigging and lifting operations. These are staples, thimbles, lanyards, belts.

Requirements for construction fasteners.

1. Securely fasten structures.

2. Have a convenient and easy way to use.

3. Fasteners must be maximally protected from aggressive environmental influences and have excellent decorative properties where it is needed.

Types of metric fasteners used in construction and repair
Vibrating slats: types and purpose

Fixed connections widely used in mechanical engineering are divided into two types: detachable (made mainly using threaded fasteners - bolts, screws, studs and nuts) and permanent (made by various types of rivets, welding, soldering, gluing).

Threaded and riveted connections are widely used in all branches of mechanical engineering, and they account for up to 35% of the total labor intensity of assembly work. The range of fasteners used is large and tends to grow. This is due to the fact that the creation of new progressive products, which are usually more expensive, does not exclude the possibility of using traditional cheap fasteners (bolts, screws, nuts, rivets, washers) in simple light-loaded units, guaranteeing the required consumer qualities cars For example, the US industry produces more than two million types of fasteners, including more than 50 thousand standard (in US terminology), totaling several billion dollars a year.

Classifier state standards fasteners for general machine-building applications belongs to the GZ group, which includes the following classes: G31 - bolts; G32 - screws, studs; GZZ - nuts; G34 - rivets; G36 - washers, cotter pins; G37 - pins; G38 - other industrial hardware. Currently, many types of progressive fasteners that are not included in the Classifier of State Standards have been developed and mastered in various branches of the machine-building complex. The variety of fasteners based on structural, technological, functional and other characteristics makes it difficult to comprehensively classify and describe them. However, all fasteners can be divided into five groups. The basis of the classification is one of the most characteristic feature, which determined the name of each group, namely: fasteners for mass use; high strength threaded fasteners; fasteners for single-sided installation and impact-free riveting; fasteners for high-life and sealed connections; fasteners for joining polymer composite materials.

The convention of the proposed classification lies in the fact that each group has a certain range of fasteners that can be classified into another group. For example, in the group of fasteners for single-sided installation and non-impact riveting, some bolt rivet designs are intended for high-life connections or for connections of composite materials. At the same time, each of the groups includes fasteners of several classes according to the Classifier of State Standards. For example, the group of high-strength fasteners includes classes of bolts, screws, nuts, and the group of high-resource fasteners includes classes of bolts, rivets, etc.

However, the proposed classification allows designers and technologists to relatively easily understand the wide variety of fasteners and take into account their specific features when designing and developing technological processes assemblies of detachable and permanent connections, and will also provide assistance to specialists involved in the design and organization of specialized production of fasteners.

It is often very difficult to name a fastener correctly. What is this?

Bolt or screw, anchor or dowel. Considering the wide variety of this class of products and the complexity of their correct names, we turn to GOST, which regulates names and terms.

Below are some of the most commonly used terms and definitions in accordance with GOST 27017-86 for fasteners and their structural elements. Next to the terms there are synonymous terms that are unacceptable for use with the designations “inadmissible!”

Types of fasteners

To details from the outside work surface should include nails, screws, screws, bolts, studs, rivets. The nuts have an internal working surface that determines their functionality. Anchors and dowels have both external and internal working surfaces. The classification below does not pretend to be absolute - it is rather a guide to the range of fasteners indicating their features (definitions from GOST 27017-86 are used), specifics of application and the most commonly used types at present.

Nails

This class of fasteners does not require a detailed description, since it is well known to everyone, but deserves a more detailed description, which is not within the scope of this material, with one exception. This is a nail-shaped screw for a nail dowel - a threaded nail that works in conjunction with plastic dowel. During installation, such a product is driven in like a nail, and if disassembly is necessary, it is unscrewed like a screw. Used for installing skirting boards and fastening light wooden structures.

Bolts

A bolt is a fastener in the form of a rod with an external thread at one end and a head at the other, forming a connection with a nut. The bolt may be threaded throughout the shank (full thread) or on the tail (partial thread). As a rule, the bolt has a hex head, less often an internal hex head. There are bolts with T-shaped, semicircular and countersunk heads, as well as hinged, butt and anchor bolts. Some bolts have a spike or tongue on the bearing surface of the head, which serves to prevent turning. Used for bolted connection, that is, in the absence internal thread in connecting parts and the need for repeated assembly and disassembly.

Screws

A screw is a fastener for forming a connection or fixation, made in the form of a rod with an external thread at one end and a structural element for transmitting torque at the other. The structural element for transmitting torque has several varieties. The most common of them is the slot. A spline is a specially shaped recess at the end of the head of a bolt, screw or screw. The simplest slot has the form of a straight through or non-through slot. In addition, a Phillips slot is common (including Philips and Pozidrive variants). There is also a six-point Torx slot. An internal hexagon is also a spline by definition. In addition, the screw can be equipped with a hexagonal head. The screw head can be cylindrical, rounded cylindrical, semicircular, countersunk, semi-countersunk or lenticular in shape. There are self-tapping screws (with a sharp or flat end), which, during the screwing process, create a thread in the material being connected. A screw with an internal hexagon wrench is indispensable in cases where it is necessary to fasten it in a cylindrical recess. Screw connections are used when there is an internal thread in the materials being connected without the use of a nut and do not require frequent assembly and disassembly. From an aesthetic point of view, screw connections (especially when using parts with a countersunk head) compare favorably with bolted connections.

Hairpins

A stud is a fastener in the form of a cylindrical rod with external threads at both ends or along the entire length of the rod. A pin connection is used when there is a thread in one of the materials being connected. Fixation is carried out using a nut (a washer is added if necessary). It should be noted that the use of studs does not improve the appearance of the connection.

Screws

A screw is a fastener in the form of a rod with a special external thread, a threaded conical end and a head at the other end, forming a thread in the hole of the wooden or plastic product being connected. At the same time, the special thread has a pointed triangular profile and a larger width of the cavity compared to the width of the tooth. This is the most commonly used class of fastener in construction and finishing works. Indispensable during installation plasterboard sheets on a metal (screw with a frequent thread) or wooden (screw with a rare thread) frame. Various types of screws are used when performing roofing, facade works, upon connection metal sheets. The roofing screw has a hex head and is equipped with an ordinary washer and a sealing washer made of weather-resistant, ageless rubber. It is produced painted (up to 18 colors), and therefore its use contributes to the creation of an aesthetically worthy appearance of the building. The structure of the splines and screw heads does not differ from similar elements of screws. Plumbing screws have a hex head.

Nuts

A nut is a fastener with threaded hole and a structural element for transmitting torque. Used in bolted and stud connections, often in combination with a washer. In addition to the usual ones, several special types of nuts are used. The cap nut (an element with spherical and flat end surfaces and a blind threaded hole) is used as a decorative one. The wing nut has flat projections to transmit torque and is hand-tightened. The self-locking nut has a nylon liner that prevents it from unscrewing spontaneously. A similar part is used under increased vibration loads. In addition, mention should be made of flange nut, castle nut, extended nut, slotted nut and weld nut.

Washers

A washer is a fastener with a hole placed under a nut or the head of a bolt or screw to increase the supporting surface and (or) prevent them from self-unscrewing. There are several types of washers. A flat washer has a flat bearing surface. A washer that serves to prevent self-unscrewing of fasteners using structural elements is called a locking washer. A spring washer (also called a Grover) is a split round washer, the ends of which are located in different planes, which serves to prevent self-unscrewing of fasteners through its elastic deformation under load. It is made of spring steel, like the locking washer (it looks like a Grover, but does not have a cut).

Rivets

A rivet is a fastener in the form of a smooth cylindrical rod with a head at one end, used to obtain a permanent connection due to the formation of a head at the other end of the rod by plastic deformation. Currently, traction rivets are used for work using plasterboard or metal sheets. As a rule, the leg of the rivet is made of steel. Installed using a special device.

Dowels and anchors

The basic principle on which the work of anchors and dowels is based can be demonstrated with a simple example. A hole is drilled in a concrete wall, a wooden plug is placed in it, and a nail is driven into it. It is the need for reliable fastening in solid foundations that caused the appearance of anchors and dowels. The anchor (dowel) fastening consists of two elements. First, there is a sleeve that fits into a pre-drilled hole. A frictional force arises between the sleeve and the base material. This occurs due to the mechanical expansion of the sleeve in the hole - which can be achieved different ways. A fastener is inserted into the sleeve - a bolt, a screw, a pin, a screw, a special nail. In addition, anchoring can occur due to external or internal stops. Anchors are designed to withstand high loads and are therefore made of metal. Dowels are designed for lighter loads and are made of plastic (nylon, polyethylene). From the regions practical application anchors installation should be mentioned door frames, special dowels are used to install window packages.

Fasteners (in most cases they are made of steel, including stainless or acid-resistant), as a rule, have special coatings that can be protective or decorative. Protective coatings protect the part from the corrosive effects of the external environment. Decorative coatings give appearance products of appropriate aesthetic quality. Zinc and chromium are mainly used for protective coatings. For decorative ones - copper, nickel and chrome.

Let's look at the most commonly used types of coatings for fasteners. First of all, it is zinc protective covering, which comes in two variants. Hot-dip galvanized coating is obtained by immersing the product in molten zinc (temperature 450-480 degrees). The layer of such coating ranges from 50-150 microns. Electrogalvanized coating (thickness 5-35 microns) is formed by galvanization. The anti-corrosion resistance of a zinc coating can be increased by passaging the product in a solution of chromic acid, as a result of which a chromate film (a compound of zinc and chromium) is formed on the surface of the part. Even scratches do not affect the protective properties of this film. Products with such a coating are called yellow-passivated. If further painting or varnishing is planned, then it is advisable to use phosphated fasteners. This coating has good anti-corrosion properties and increases the adhesion of paints and varnishes.

This overview of fasteners is necessarily brief and, of course, far from exhaustive. It does not cover some special fastener parts, such as pins and cotter pins. A separate topic is also fastenings that involve the use of adhesives - adhesive anchors

Any product assembled from individual parts does not fall apart thanks to reliable fastenings, which are often hidden from view. These elements are usually inexpensive, but the strength and durability of the structure as a whole depends on them.

Take a look at the photo of metal fasteners, they are presented in a large assortment, they have modern design. Its role has increased due to the development of advanced technologies in construction and the emergence of new roofing materials: fasteners allow you to speed up finishing work.

Which fastener should I choose? Primary requirements

Fasteners for metal structures should be selected especially carefully; the safety of people often depends on this. It is necessary that the fasteners meet the basic requirements and have the following characteristics:

Strength. This parameter directly depends on the quality of the materials used in production; it is also important that the technology is strictly followed during production. An example of a product that meets the required quality standards is fasteners made of metal, TM “Zubr”.

Anti-corrosion resistance. Special protection is applied to the products; galvanized coating is considered one of the most common; it can be easily distinguished from others by its characteristic light silver color.

Zinc can be applied to the surface in two different ways: for obtaining hot-dip galvanized coating metal parts dipped into zinc at a temperature of 450-480 degrees, the layer of hot metal can be from 50 to 150 microns.

The second method is called galvanization; its essence is that an electrogalvanized coating is applied to the part by electrolysis; the thickness of the layer can vary from 5 to 35 microns.

Another common anti-corrosion protection is passivation in a special solution with chromic acid. Any fastener for a metal profile is dipped into the solution, due to which the surface of the part is completely covered with a thin oxide film, which has increased strength.

Scratches have no effect on the chromate film yellow color with a silver tint, yellow-passaged fasteners are not subject to corrosion.

You should choose the right types of metal fasteners; if you plan to subsequently paint or putty the building structure, buy fasteners with a corrosion-resistant coating that reliably adheres to paints and putty.

There are 2 methods of obtaining such a coating: phosphating and oxidation, the first method involves chemical treatment using depolarizers and phosphates, and the second using alkaline solutions.

In both cases, black products are obtained, which are sold in hardware stores along with fasteners that have only an anti-corrosion coating.

How do you know if a fastener is suitable for installation?

Suitability is influenced by 2 parameters: thoughtful design and production of the working profile with extreme precision.

The working profile is the shape of the surface of the tool, due to which force is transmitted from the tool to the fastener when unscrewing or tightening, and it is not at all necessary to have remarkable strength in order to work with it.

Manufacturers produce various working profiles; if the tip is inserted into the head of a screw or screw, this working profile is called internal; if we consider the external working profile, the tool covers the fastening head.

It is better to choose fasteners with a large total area, this means that the fastener and the working part of the tool have many “contact spots”.

The dynamics of growth of “contact spots” depending on the increase in load also plays an important role that should not be forgotten. It is recommended to use working profiles if their total area increases with the application of force.

Why does the fastener fail?

Metal or metal can be torn off by applying too much force when unscrewing or tightening bolts and other fasteners; there are cases when the fasteners become deformed.

Do not use tools with unsuitable profiles, another common reason is incorrect placement of the tool's working part in the fastener profile, and finally, do not work with low-quality tools.

The working profile must be carefully selected for each case, taking into account the operating conditions of the structure, how convenient access to the fasteners is, the condition environment depends on whether the fastener will be constantly exposed to moisture. Choose the right working tools, observing all the above conditions, and you won’t go wrong.

Photos of metal fasteners

Modern fasteners

IN last decade new ones came to us from abroad construction technologies and along with them modern building, facing and insulating materials. Unfortunately, much less is known about modern fasteners in our country.

General purpose fasteners

Designed for fastening to any building structures made of concrete and brick - solid and hollow (from hollow brick to hollow aerated concrete blocks). The fasteners include a dowel and a screw for wood or chipboard.

Hollow material fasteners

Used for fastening light elements - lamps, shelves, baseboards, switches, cornices, hangers, pictures, etc. to hollow (thin-walled) structures, such as plasterboard, gypsum fiber sheets (GVL), chipboard, sheet steel, hollow profiles , ceilings with voids, hollow doors, etc. The fastener consists of a special dowel for hollow materials and a screw.

Dowels for insulating materials

Intended for mechanical fastening hard and soft insulating materials in the form of a panel or sheet (rock wool, glass wool, polystyrene, polyurethane, polystyrene foam, fiberboard boards, coconut fiber mats, cork, etc.) on a plane of concrete, lightweight concrete, natural stone, solid and hollow bricks, hollow blocks and aerated concrete. For installation of some models of such dowels, additional nails and screws are not required. Other models come complete with a steel expansion nail. Leading fastener manufacturers use for these purposes only galvanized and passivated (with additional coating) steel nails with increased bending strength.

Dowels for aerated concrete

Already from the name itself it is clear that they are designed specifically for attaching windows, doors, grilles, consoles, pipelines, suspended ceilings, wood and metal structures to building structures made of aerated concrete, cable routes, plumbing equipment etc. They are used complete with a locking screw made of galvanized and passivated or stainless steel.

This is the most modern class of fastening systems. They are intended for mounting parts on structures made of heavy concrete, dense natural stone and other dense materials of equal strength in cases where an increased level of reliability and safety is required (including for fastening facade cladding And load-bearing elements structures - traverses, consoles, etc.). The principle of operation of chemical fastening systems is based on filling the prepared hole with a special two-component mixture, which, when hardened, “tightly” fixes an anchor or threaded rod in the hole (the outward end of the rod looks like an ordinary threaded rod). The mixture is in a glass cartridge, which is inserted into the hole. After this, a rod is screwed in, which crushes the glass, and the mixture fills the entire volume of the hole.

Injection fastening systems

They are a type of chemical fastening system. The difference lies in the method of filling the hole - in this case, by directly squeezing the mixture out of the cartridge, similar to the use of sealants. Such fasteners are used for the installation of gratings, fences and railings, pipelines, plumbing fixtures, etc. Depending on the material of the building structure - hollow or solid - the system is used with or without an anchor sleeve, respectively.

Used for fastening sinks, urinals, bidets, wall-hung toilets, water heaters to wall structures made of concrete, natural stone, solid brick gypsum boards, hollow blocks, aerated concrete (there are special models designed for fastening to walls made of plasterboard, gypsum fiber boards, chipboard). This fastener includes a dowel, a galvanized and passivated steel stud, a nylon flange nut and a metal decorative cap. Toilet fasteners are designed to secure toilets to concrete floors. It consists of a dowel, a brass screw, a locking sleeve and a decorative cap.

Fasteners for balcony structures

Designed for fastening wooden balcony cladding, polymer materials and metal, general cladding, small pieces of equipment, wire ties, building elements, etc. To structural elements balconies. Simply put, such fasteners are designed for fastening to thin-walled metal elements from which the balcony fence is assembled (pipes, profiles, sheets, panels and slabs several millimeters thick). The fastening consists of a nylon spacer with a collar, a brass screw and a decorative cap.

Frame fasteners

Designed for fastening frames, connecting wall and plaster profiles, wooden parts (including lathing for plaster), skirting boards, wall corners, cable ducts, cable and pipe clamps, etc. The fastener consists of a special frame dowel and an expansion screw.

Created for invisible fastening wooden steps on concrete or metal profiles, solid brick, natural stone. The fasteners include: a nylon dowel with a shoulder for fastening to solid materials or a nylon spacer cartridge with a shoulder for fastening to thin-walled structural elements, a brass or galvanized and passivated steel screw, a core for accurately marking holes in the board. Such fasteners can be used not only for stair steps, but also for invisible fastening of any other wooden elements.

Dowel clamp

Designed for fastening individual cables, flexible pipes or cable harnesses to building structures made of concrete, solid silicate and clinker bricks, natural stone, lightweight concrete and aerated concrete.

Cable and pipe clamp

Designed for rational fastening of cables and pipelines to building structures. The clamps themselves are attached to the structures using dowels and screws. These clamps are available in various sizes, each equipped with a special element that allows the clamps to be fastened together.

Fastener selection

When choosing fasteners, you need to remember that this is a very serious and responsible matter. After all, pieces of furniture lighting, technical designs, which are attached to the walls and ceiling, are usually located higher than human height (in any case, higher than the height of a child). Moreover, even not the heaviest of them (say, a picture or a sconce), if it breaks from its fastening, can cause very serious injuries. What can we say about a hanging cabinet or bookshelf that has fallen off the wall? That's why main advice: if you want to feel calm and safe in your own home, use only fasteners from leading global manufacturers. Installation is a responsible matter, and the quality of your repair depends on how it is carried out. In order to choose the right fasteners (with the help of tables you can easily select fasteners, depending on the material used) and learn about new fastening systems, you can view catalog of Fischer fastening systems 2014.

Modern fastening systems are a guarantee of high-quality and reliable fastening

At the end of June 2017 in Germany, the Fischer Group, a world leader in the field, received the “Special Trust” award (“Stein im Brett”), becoming No. 1 in the field of construction fasteners. The main criteria for receiving a high rating were product quality, price, ease of installation, and the desire to recommend the product to others. The award was awarded based on the results of a survey of builders and sales representatives. The questionnaire included 297 suppliers construction equipment in 26 product categories.

The ease of installation of Fischer products was especially noted. This is recognized as the most important aspect in the daily work of builders and one of the main reasons why craftsmen recommend each other to use this type of fastener German manufacturer. In order to continuously improve products and simplify the installation process, Fischer specialists regularly organize meetings with installers and builders, as well as with representatives of trading companies. “After all, only those who work with our products every day help to find solutions to various construction problems on various sites and can truly judge the quality of products and services, as well as the level of the manufacturer,” comments Ralf Haefele, Managing Director of FischerGermany Sales GmbH.

The study was carried out during 3000 master classes by the ibau information center. The purpose of the survey was to determine the “especially revered” brand and the best manufacturer in construction industry. “This survey is the largest and most significant in German trade,” said Sven Homann, Managing Director of ibau. The study was carried out with the support of the marketing agency Heinze and the online platform Helden am Bau.