Self-tapping screws for corrugated board

Features of fastening the profiled sheet with self-tapping screws to the roof, wall or fence frame

• Using a profiled sheet as a roofing material, it is necessary to give it high waterproofing and wind-resistant characteristics. For this, special high-quality roofing screws and a small pitch of the lathing are used. Long roofing screws are required to secure the ridge.
• Using a profiled sheet as a facade material for insulating walls, the step of the lathing is selected based on the parameters of the insulation, and is usually 0.5 - 1 m. Often, the sheet is fixed not from top to bottom, but along the wall, in which case the lathing must also be expanded. The requirements for waterproofing are not so high, self-tapping screws with a press washer with an additional elastic gasket are often used.
• When assembling a fence made of corrugated board on the frame, it is necessary to take into account the high wind loads on the sheet. To ensure wind resistance, the profiled sheet is attached to each log in each wave. Various fence options are possible - with gaps in the corrugated board for posts, with horizontal fastening of sheets, with the installation of corrugated sheets without overlap. It is permissible to use both roofing screws and with a press washer and gasket.

The choice of corrugated board is the best solution for a small budget. Possessing good performance characteristics and appearance, with proper installation with the help of high-quality self-tapping screws, the corrugated board can serve up to 30 years without repair.

Types of self-tapping screws

The self-tapping screws for the fence are self-tapping screws. This is a rod with a head, which has a self-tapping triangular thread over its entire surface.

Self-tapping screws

In accordance with the technical characteristics and design features, they are divided into the following types:

1. Wood fence screws. They are characterized by a large thread pitch, which ensures their reliable fixation in wood, which has insufficient density. Due to the presence of a sharp tip, the possibility of wood splitting when screwing in the fixture is eliminated. They can be phosphated, yellow passivated, galvanized.
2. Self-tapping screws for a fence made of corrugated board. Depending on the characteristics of anti-corrosion treatment, they are pointed and galvanized. Some fixtures have a hex head. The self-tapping bug has a drill for metal. The first type of fastener is used for a fence made of profiled sheet. Thanks to the zinc coating, it is possible to simplify the fastening of screws to materials such as drywall, galvanized steel, plastic.
3. Anti-vandal self-tapping screws. These are special reinforced bolts that are pre-welded to metal structures. Such devices are needed to ensure the strength, reliability and durability of the structure.
4. Colored fasteners for corrugated board. The use of screws for fastening the profiled sheet to the fence ensures its attractive appearance. Their color corresponds to the standard palette of the base material.
5. Galvanized screws for corrugated board. The consumption of galvanized self-tapping screws on a sheet of corrugated board for a fence or on a roof is the same as for other varieties. With their help, the material is attached to wood or metal. They have a neoprene sealing washer.

Color spectrum

There are several types of devices with which the corrugated board is fastened. Which self-tapping screws to choose depends on the characteristics of the base material, pillars and crossbars.

The screws differ in shape. They can have a countersunk, wafer, flat or hemispherical head.They also differ among themselves in splines, pitch, type of thread.

A bracket or self-tapping screw has several varieties, depending on the characteristics of their operation. The most popular fasteners are those with frequent thread pitch. With their use, the profiled sheet is attached to wooden logs and posts.

Galvanized version for corrugated board

The bracket is installed in small increments. The structure built with these screws is robust and reliable. In order to connect the corrugated board and the wooden structure, it is recommended to pre-drill a hole in the metal sheet. After that, the screw is screwed into the wooden base.

If the fence made of corrugated board will withstand significant wind loads in the future, then this requires the use of special screws. The material for their production is high-alloy steel.

The thread of the fixtures is characterized by a rare pitch. The tip of the self-tapping screw has a special sharpening, which excludes the possibility of damage to the wood during screwing in. Such products have a painted head that matches the color of the profiled sheets.

Types of professional sheet

Varieties ↑

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There are two types of fasteners - self-tapping screws for metal and wood. The first ones are larger in diameter than the second ones, and they hold worse in wood, therefore, they are practically not used as fasteners for wooden structures. Actually, as well as vice versa, self-tapping screws for wood are impossible or at least very difficult to screw into metal. They also differ in thread pitch: according to GOST, self-tapping screws for metal have more frequent threads.

Healthy
1000 pieces of 4.8 * 29 format products weigh about 5 kg. By the way, as a rule, when buying in a store, you will see not the price per piece, but for the same 1000. Nevertheless, we note: the price of one self-tapping screw with a polyester coating is about 3 rubles, and a dyed one with a polymer layer - from 8 rubles.

For metal with a drill: GOST, dimensions, features

dimensions, weight

In addition to the threads running through the body of these elements, they have a pair of vertical drilling blades at their end. When screwing in the hardware, they drill a pilot hole, that is, the installation is carried out directly into the metal base without preliminary drilling. These products prevent deformation of the metal coating and protect it from damage at the attachment points. The package also includes a metal washer and a press-fit weatherproof rubber gasket. The head of the hardware is hexagonal. They are mounted using a bit for a roofing screw.

Wood: dimensions

They are used when connecting any elements made of wood. The presence of a drill at the end of the part makes it as easy as possible to use it. If holes are pre-drilled on metal profiles, they can be used to attach metal profiles to wooden surfaces. Fastening is carried out using the through-mounting technology, using a special socket wrench for a hexagonal nozzle. The most in demand are self-tapping screws for a hexagon for wood with a length of 100 and a diameter of 8 mm. Note that in this case, their length ranges from 11 to 200 mm.

wood screws size table

Important
The type of self-tapping screw is chosen depending on the type of base to which the material for the roof is supposed to be attached: for a wooden base, fasteners with a sharp end are needed, for a metal base - a drill-shaped one.

Galvanized and painted

Usually, roofing screws for metal tiles, polycarbonate or other sheet materials with a polymer coating, as well as for slate, are colored. The sheets and fasteners to be fixed should match each other as much as possible in color, therefore, as a rule, they are selected by marking. The most commonly used RAL colors are:

• green - 6005;
• cherry - 3005;
• blue - 5005;
• white - 9003;
• brown - 8017.

The use of colored species not only improves the aesthetics of the roof. The paint becomes an additional barrier to corrosion.

On a note
These products differ from the previous types only in coloring. The weight and dimensions of one part are clearly regulated by GOST.

Specifications

A self-tapping screw with a press washer belongs to the varieties of products used for metal work. Its production is regulated by the requirements of GOST 1144-80, 1145-80, 1146-80, for products with a drill tip, DIN 7981, DIN 7982, DIN 7983 are applied.

Officially, the product is referred to as "self-tapping screw with press washer". Products are made of ferrous or non-ferrous metal, most often on sale you can find a galvanized self-tapping screw or a roofing version with a colored head.

The main characteristics of this type of metal products:

• thread in the range ST2.2-ST9.5 with fine pitch;
• the bearing surfaces of the head are flat;
• zinc coating, phosphate, painted according to the RAL catalog;
• pointed tip or with a drill;
• cruciform slots;
• semicircular hat;
• material - carbon, alloy, stainless steel.

Black self-tapping screws with a press washer are used only for interior work. Galvanized and non-ferrous metals are suitable for outdoor use. These products do not require preliminary drilling of a hole - the self-tapping screw goes into metal and wood, drywall and polycarbonate easily and quickly.

How many screws are needed for 1 sheet of corrugated board for a fence

Before installing the profile fence, it is necessary to calculate the number of self-tapping screws. You can perform this action using a special formula. In order to determine how many self-tapping screws per 1 m2 of profiled sheet you need, you need to calculate the total area of ​​the fence.

Fastening the profiled sheet to the fence

For 1 m² of corrugated board fence, 10 to 15 screws are required. This takes into account how often the posts are installed. The consumption of self-tapping screws for a profiled sheet, the width of which is 110 centimeters, is 10-15 pieces. Along the edges, the installation of the sheets is carried out with an overlap, so one self-tapping screw holds two sheets together at the same time. Screws need to be screwed into pillars and logs made of wood. 1-2 fasteners are screwed into each post, and 6-8 into the lag. This is the consumption of self-tapping screws per 1m2 of profiled sheet.

In order to calculate the number of sheets of corrugated board for the fence, the length of the fence is taken, which is divided by the width of the sheet. The number of sheets is multiplied by 10-15. This will allow you to make the necessary calculation of self-tapping screws for corrugated board and buy them in the optimal quantity.

Fencing installation diagram

For the installation of a corrugated fence, it is recommended to prepare the following materials in advance:

1. Professional sheet. It is recommended to purchase sheets for the entire length of the fence. The thickness and height of the waves are selected depending on the strength characteristics. The pillars should have a height of 20 cm more than the length of the profiled sheet, since they are dug into the ground. When counting sheets, you need to take a larger number, since there are overlaps of 8 centimeters between the sheets.
2. Screws. For the installation of the fence, a roof bracket or a device with a press washer can be used. When choosing it, the requirements of waterproofing are taken into account. The bracket is selected in accordance with the material of the batten, which is mounted between the posts. It can be wooden or metal.
3. A screwdriver or drill that has a matching bit for a hexagonal head. Installation of thin sheets of corrugated board can be carried out with wrenches.
4. A hacksaw and scissors for metal. The grinder is used for work, after which the material is painted.
5. Cord, level.

Sheet fastening drawing

After purchasing the material and preparing the necessary tools, you should proceed with the installation work. When installing the fence, it is recommended to use self-tapping screws for the corrugated board measuring 4.8x29 or 5.5x19 millimeters.

They must have a rubber gasket to ensure a tight fit. Fastening the sheet to the lags is carried out with self-tapping screws, which are located at a distance of 25-30 centimeters from each other.

Correct fastening

Initially, it was recommended to install the supports for the fence made of corrugated board into the holes pre-drilled with a drill. They should be equidistant from each other. When installing a fence made of corrugated board, a distance of no more than 2.5 meters must be observed.

At the next stage, the horizontal transverse lags are fastened to the fence posts made of corrugated board. These can be metal profiles or wooden beams, which are installed on poles in several rows.

Fence installation drawing

The profiled sheet is screwed to the logs with self-tapping screws. After screwing the first sheet, the next one is positioned so that the edge of the previous one overlaps the previous one by 8 centimeters. The connection point must be treated with silicone sealant, which provides additional insulation and is characterized by resistance to moisture.

At the corner joints and ends, you need to mount special strips, that is, cover strips. To ensure long-term operation of the corrugated board, it is recommended to treat the ends with an anti-corrosion compound.

When fastening the screws, use rubber pads that match the color of the fences. The screws are screwed in vertically in accordance with the surface of the profiled sheet, which eliminates the possibility of skewing. After screwing in the screws, this place is primed or coated with paint, which is combined with the profiled sheet in color.

Mounting scheme

Applications

According to their purpose, self-tapping screws with a press washer are quite diverse. Products with a pointed tip are used to attach soft or fragile materials to a wooden base. They are suitable for polycarbonate, hardboard, plastic sheathing.

Painted roofing screws are used in combination with polymer-coated profiled sheet, their classic galvanized counterparts are combined with all soft materials, sheet metal with a smooth surface. It is necessary to screw in self-tapping screws with a drill bit with a special tool.

The main areas of their application:

• installation of metal lathing;
• hanging structures on a sandwich panel;
• installation and assembly of ventilation systems;
• fastening the slopes of doors and windows;
• formation of barriers around the site.

Self-tapping screws with a pointed tip have an even wider range of uses. They are suitable for most types of interior work, do not spoil even fragile and soft coatings, decorative elements in interior decoration.

Stainless self-tapping screws and screws

Wood grouse DIN571 plumbing screw (A2, A4)

The stainless steel wood screw DIN 571 is made of steel A2 or A4. Designed for fastening wooden logs, beams, slats and other wooden substructures. It is possible to use a bunch of screw + plastic or metal dowel. Quite often used in conjunction with a reinforced washer.

Roofing self-tapping screw DIN 7504K (standard drill) (A2, A4)

Stainless self-tapping screw DIN 7504K is designed for fastening various metal structures without pre-drilling holes. The hexagonal head is equipped with a pressed-in washer. Made of steel A2 or A4.

Countersunk self-tapping screw DIN 7504O (A2)

Stainless steel self-tapping screw A2 DIN 7504O countersunk head, Philips slot. Designed for work on metal, aluminum, stainless steel without pre-drilling. The tip is drilled.

Self-tapping screw with a semicircular head DIN 7504M (A2, A4)

Self-tapping screw DIN 7504M from stainless steel A2 or A4 is intended for fastening structures in conditions of increased aggressiveness of the environment. It is intended for fastening sheet materials made of various metals (stainless steel, galvanized, aluminum, sheet metal, etc.).Equipped with a drill and does not require additional drilling during installation.

Screw DIN 7976, hex head (A2)

Stainless screw DIN 7976 (steel A2) is ideal for use in conditions of increased aggressiveness of the environment (moisture, reagents, dirt, etc.). Used for fixing sheet materials such as plywood, plastic, metal sheets, etc. The head has the shape of a hexagon, is designed for a turnkey or a special attachment.

Screw DIN 7981, semicircular head, slot PH (A2, A4)

The stainless steel screw DIN 7981 is made of steel A2 or A4. Resistant to aggressive environments. Used for fastening plywood, plastic sheets, stainless steel sheets and other sheet materials. Due to the semicircular head, maximum sheet pressure is ensured. Philips slot.

Wood screw DIN 7981, semicircular head, slot Z (A2)

The DIN 7981 screw is made of stainless steel, galvanized. Equipped with a semicircular head with a Z-slot - a cruciform, sharp tip. It is used for fixing wood, sheet materials, metal.

Screw DIN 7982, countersunk head, slot PH (A2, A4)

Screw DIN 7982 made of stainless steel A2 or A4 is intended for fastening various parts in an aggressive environment. Suitable for both wood and metal structures, however, to screw into metal parts, you must first drill a hole. Countersunk head, Philips slot.

Screw DIN 7982, countersunk head, slot PZ (A2)

Screws DIN 7982 have a countersunk head, slot PZ (cross-shaped). Production material: stainless steel. When screwing into wood, plastic, no pre-drilling is required.

Screw DIN 7983, half-countersunk head, slot PH (A2, A4)

Stainless screw (A2 / A4) DIN 7983 is used for operation in conditions of increased aggressiveness of the environment (water vapor, salts, alkalis, acids, etc.). Allows fastening of wooden, plastic and metal (with preliminary reaming) structures. Semi-countersunk head with Philips slot.

Self-tapping screw & quot; Klop & quot; cross recess (A2)

Self-tapping screw "Bedbug" is used in construction to obtain high-quality fastening, equipped with a drill, which makes it possible to fasten metal without preliminary drilling. The head has a cross recess washer. Production material: stainless steel A2.

Self-tapping screw with hexagon socket (A2)

The self-tapping screw DIN 912 has a cylindrical head with a hexagon socket. Manufacturing material: stainless steel, coating: galvanized. Scope of application: mechanical engineering, construction, repair, installation.

How to choose a drill for a dowel

There are also differences in the thread profile. Self-tapping screws have sharper and higher threads with different angles of inclination. Small drills are used for wood, large ones for metal. Self-tapping screws have a countersunk, semicircular head for a screwdriver or with a washer.

Differences, advantages

What is so good about self-tapping screws, because they are practically the same screws, but of a higher quality? Self-tapping screws are made using a specific technology. For manufacturing, only strong steel alloys are used, which undergo subsequent heat treatment. Otherwise, we can say that they are made of hardened steel. Like all steel fasteners, self-tapping screws for corrosion protection can be phosphated, oxidized or galvanized with passivation.

After such processing, the screws become characteristic black or brilliant white and acquire significant resistance to corrosion. For docking with the tool, they use clear and precise cross-shaped slots.

Self-tapping screws made of brass or stainless steel can be considered exotic.

Self-tapping screws with high screw threads have a thin and sharp profile.It is very easy to cut threads in sufficiently hard metals with self-tapping screws with such a thread profile. Moreover, its end is made in the form of a sharp cone. He, like an awl, makes a hole in the material for accurate installation and so that you can start threading. The work of the end of a self-tapping screw can be compared to the work of a drill. In some types of self-tapping screws, a kind of drill is formed at the end, which makes it possible to avoid drilling and threading. At the same time, it can be easily screwed into metal with a thickness of up to 2 mm.

Those self-tapping screws that are used to fasten various metal parts have more frequent threads. Quite often they have a two-start thread.

Universal self-tapping screws have medium pitch threads.

For fastening parts of wooden structures, self-tapping screws are used, which have a wide thread pitch, a large angle of inclination and a fairly sharp end.

The most popular self-tapping screws have a countersunk head that smoothly goes into a threaded rod. This form of fasteners is ideal for mounting drywall sheets. Self-tapping screws with a hex head are no less popular with us. Most often they are used when increased strength of fasteners is required. They are used together with plastic dowels to attach heavy objects to walls.

The roofing screw has a hex head, which goes into a large washer (press washer). It has a rubber gasket to seal the joint and is painted in one of the common colors of roofing materials (white, green, red, etc.).

Self-tapping screws with a semicircular head turning into a washer are used to join sheet-shaped materials. These sheet metal fasteners have fine pitch threads. At the same time, the shape of the head with an increased diameter makes it possible to more efficiently fasten the material by increasing the pressure to the base, when it is simply impossible to make a countersink.

Short self-tapping screws with a tip in the form of a drill and a semicircular head are used to fasten parts made of a metal profile. Very often they are called bedbugs and fleas.

Also, screws and self-tapping screws have differences in the preparation of the material for the use of fasteners. When using a screw, it is necessary to drill holes, where it is then screwed in. When using a self-tapping screw, the material does not require such preparation. The screws have only two types of heads. Self-tapping screws have a huge number of types of heads: several types of countersunk heads, hexagonal with and without a washer, semicircular with and without a washer, cylindrical and trapezoidal.

Self-tapping screws, due to their strength, are used for fastening all kinds of materials, from wood, plastic to metal, concrete.

We can conclude: the difference between a screw and a self-tapping screw is that screws require a pre-drilled hole, and self-tapping screws are suitable for almost all materials and do not require preliminary preparation of the working surface.

Classification

Self-tapping screws are classified into separate groups depending on different criteria - type of head and coating, type of tip, material.

By head type

Types of fasteners:

Self-tapping screws for metal with a press washer. Designed for joining metal sheets up to 1 cm thick. Thanks to the large head, the parts are securely fixed.
Hemispherical. Large fasteners that are designed to fix various metal workpieces.
Cruciform. They are considered the most reliable and versatile. For tightening, you can use standard Phillips bits for a screwdriver. They fit tightly into the material without breaking its structure.
Self-tapping screws with a straight slot. Such fasteners are more often used to connect wooden parts.
Hex head. Screwed into different materials. To tighten, you need a special wrench or screwdriver bit.
Countersunk head.To tighten the self-tapping screw, you must first drill a hole with a smaller diameter.

It is important that the cap fits snugly against the material, does not protrude outward.
Reduced countersunk bonnet. Small diameter head

It is easy to hide it in the material to be joined.

Self-tapping screws with a press washer (Photo: Instagram / anna_schelepneva)

By tip type

Depending on the type of tip, there are several types of fasteners:

1. Self-tapping screws for metal with a drill. The tip of such fasteners is a drill consisting of two feathers. Suitable for fastening metal sheets up to 2 mm thick.
2. Fasteners with a sharp tip. There is a thread on the rod for easy screwing. Suitable for fastening metal sheets up to 0.9 mm thick.

By type of coverage

Types of self-tapping screws:

1. Phosphated - black hardware. Manufactured from carbon steel. They undergo additional processing with phosphates. Suitable for fastening parts in high humidity conditions.
2. Oxidized - made of carbon steel, black. A protective film is applied to metal surfaces.
3. Galvanized - carbon steel is used for manufacturing. The surfaces are coated with a zinc layer. They are used for the installation of metal parts outside, indoors.
4. Galvanized yellow - products similar to standard galvanized fasteners, but different in appearance.
5. Uncoated - suitable for indoor work at normal humidity levels.

Self-tapping screws of different types (Photo: Instagram / stroi_s_nami82)

By material

Material:

1. Carbon steel is an alloy based on carbon and iron, which is not supplemented by foreign impurities. They are distinguished by a high strength indicator.
2. Brass is an alloy based on copper and zinc. To change the technical characteristics, manganese, lead, nickel, tin, iron can be added. Brass fasteners stand out for their high wear resistance and reliability. The material is immune to prolonged exposure to moisture, temperature changes.
3. Stainless steel is a material that contains about 10.5% chromium. The stainless steel has an increased strength index. The material is resistant to rust formation.

Selection recommendations

When choosing self-tapping screws with a press washer, it is very important to pay attention to some parameters that are of the greatest importance in their subsequent use. Among the useful recommendations are the following

The white or silver color of the hardware indicates that they have an anti-corrosion zinc coating. The service life of such screws is as long as possible, calculated in decades.

But if work on metal is coming, you should definitely pay attention to its thickness - the sharp tip will roll over at a thickness of more than 1 mm, here it is better to immediately take the option with a drill.

A painted self-tapping screw with a press washer is the best choice for installing roofing or fence coverings. You can choose an option for any colors and shades

In terms of corrosion resistance, this option is superior to conventional black products, but inferior to galvanized ones.

Phosphated hardware has a color from dark brown to gray, depending on the characteristics of their processing, they have a different degree of protection from the influence of the external environment. For example, oiled ones receive increased protection against moisture, they are better stored. Phosphated products lend themselves well to painting, but are used mainly for work inside buildings and structures.

The type of thread matters. For self-tapping screws with a press washer for metal work, the cutting step is small. For woodwork, chipboard and hardboard, other options are used. Their threads are wide, avoiding breaks and twisting. For hardwoods, hardware is used with cutting in the form of waves or dashed lines - to increase the effort when screwing into the material.

Considering all these factors, it is possible to choose suitable self-tapping screws with a press washer for performing work on wood and metal, fastening fences from a profiled sheet, creating roofing coverings.

You will learn how to choose the right screws with a press washer and not purchase a low-quality product in the next video.