All photos from the article
The development of the roofing materials industry has led to the emergence of new types of fasteners - roofing screws. special kind screws are used to attach metal profiled sheets to a wooden or metal base.
Let's talk about the main types of these screws today.
Features of the fastener device
Roofing screws have significant differences from other types. To overcome the resistance of the metal sheet that secures this fastener, its rod, even with a small length, has a significant diameter. Also high strength contributes to the material from which the parts are made - carbon steel.
The head of this type of fastener is made in two main designs - semicircular and hexagonal. The first option is equipped with a cross slot for a screwdriver or bit of the appropriate shape. The second slots in the caps do not have, since their shape suggests the use of special hexagonal nozzles for a screwdriver.
Another feature of roofing hardware is the presence of two washers. One of them is made of special high-strength rubber.
Its task is to seal the installation site by tightly pressing against the hole in the metal roof. The second washer distributes the force from the head of the screwed screw to the rubber gasket.
Note! V last years self-tapping screws equipped with concave EPDM washers appear on the construction markets. This allows, when screwing in the self-tapping screw, to create an additional force on the clamp. rubber gasket along the edges, more reliably closing the access to atmospheric moisture to the hole in the metal roof.
The main types of roofing screws
Before dwelling in more detail on the types of fasteners, let's talk about the use of roofing iron.
Currently, profiled steel sheets are used:
- for the manufacture of metal roofs various forms are used roofing materials, having the name "profiled sheet" and "metal tile".
- for the installation of walls of industrial buildings, coupled with the use of various heaters, in the form of so-called sandwich panels;
- for the manufacture of metal.
Self-tapping screws for wood and metal
Depending on the material of the base to which the fastening is performed metal sheets, separate roofing screw for metal and wood. The main structural difference between the two hardware is the shape and size of a small two-blade drill on the tip of the screws.
Note! A simple self-tapping screw is very difficult to screw through a metal sheet with a thickness of 0.5-0.8 mm. The process of pre-drilling at the fastener installation sites will require a significant amount of time in the total amount of work. In this regard, manufacturers combine a screw and a drill in one fastener.
The length of the drill located on the tip may be different and depends on the expected thickness of the base for fastening metal sheets. This aspect must be considered when buying fasteners. The price of fasteners with extended cutting edges may differ slightly from screws that have a shorter drill.
The diameter of the cutting part of the screw also varies depending on the type of base material to which the profiled steel sheets. By appearance home master must distinguish between hardware for a metal and wooden base.
The diameter of the drill for roofing fasteners for a steel base, which is often various rolled products, as well as rectangular pipes, has a size close to the diameter of the main thread. The width of the cutting edges is 2-2.5 times less than its helical part.
Another criterion that must be considered when choosing fasteners is their length. It depends on the thickness of the attached material, the quality of the crate and its thickness.
The sizes of roofing screws for wood or metal are located in a fairly large range, which expands the possibilities of their use. Because the screws greater length allow you to get more secure fastening, they are recommended on complex roofs with a large slope.
The color range of sold hardware is not very large. They produce screws with a galvanized surface, as well as painted in the color of the most common types of profiled sheets - green, brown, red-brown (cherry), white and blue.
Use of roofing screws
If you are planning to install a roof or install a fence from a profiled sheet with your own hands and have never encountered the process of installing roofing screws, the proposed instructions will help.
- Determine the type of base to which you plan to mount metal parts, and purchase a sufficient number of screws with a drill according to GOST of the required color and length. Average consumption is 8 hardware per one profiled sheet of standard size.
- The work of screwing in will be greatly facilitated by a screwdriver with a bit having a hexagonal hole for a hat of 8 mm. When fastening sheets on the roof, try to choose a tool of light weight, as it will be difficult to perform a large amount of work with a heavy screwdriver.
- Lay or install a profiled sheet on the crate, insert a self-tapping screw with a hat into a bat. The device is equipped with a small magnet, which allows the fasteners to be securely fixed. This is convenient when working in hard-to-reach places limiting retention.
- It is recommended to screw fasteners perpendicular to the metal surface in the lower part of the wave. The drill of the self-tapping screw drills through the metal of the profiled sheet and is introduced into the crate. The metal base is also drilled, and the screw cuts into it with a threaded part.
- Try to set the optimal force on the screwdriver to prevent strong deformation of the rubber gasket. Otherwise, it will not fulfill its purpose, which will lead to metal corrosion and roof leakage.
Concluding the conversation
From a large number screws for various purposes roofing screws are distinguished by their special form. They are very easy to use and reliable. Their service life correct use can reach 50 years.
A more detailed story on the topic contains a video in this article.
Despite the fact that hardware products, in fact, can be considered "small things", the Baltopttorg online store does not bypass it, paying great attention to hardware. The reason for this is the wide demand for hardware products among the population, which uses it in a wide variety of jobs. If you still don’t know what hardware is in St. Petersburg, then we inform you that this term is, in a way, an abbreviation for “ hardware". This can include a wide variety of high-quality metal products, which, for the most part, have a wide purpose. Take, for example, gypsum wood self-tapping screws, which are also products of a wide or domestic use. They, of course, can also be ranked among the hardware, the price of which is at a minimum level. At the same time, in addition to products that are quite familiar to us, there are also specialized (industrial) hardware, which can not be bought everywhere. A striking example- self-tapping screws with a drill for metal. You are unlikely to need them in everyday life, but for industry they are simply irreplaceable. So, in Baltopttorg you can buy hardware in all their huge assortment. We definitely pay attention to each item, with special emphasis on ensuring that the price of our hardware is as low as possible. And let the difference be only one or two rubles, in comparison with competitors. The total cost will still be significant, because you are unlikely to take hardware in St. Petersburg individually. For standard work, you will need at least a handful of them.
We proceed to a more detailed consideration of the assortment of Baltopttorg in this section. To begin with, we note that, despite the fact that hardware products are not limited to fasteners alone, for our region, buying fasteners in St. Petersburg is similar to the expression "buy hardware", which is explained by cultural characteristics. So, if you need to buy fasteners in St. Petersburg, you have definitely come to the right place. Everything that you only dream of, you will find in this section. For example, you may urgently need to buy exhaust rivets. Can you find them in Baltopttorg? Of course! Or maybe you have been looking for a long time all over the city, where is the best price for roofing screws? Again, you have found the right place for you. Not only are we proud of our genuine huge assortment, so it’s also cheaper to buy fasteners in St. Petersburg in our online store. Let's not get too excited about exactly how we managed to achieve such significant success in pricing. Let's just say that for any hardware products, including wood screws, you simply can’t find prices lower, you don’t even have to look. What conclusion can be drawn from this? Very simple. If you need to buy fasteners in St. Petersburg, contact Baltopttorg immediately. You will not regret!
Let's take a simple example. Let's say you urgently needed to buy St. Petersburg rivets. You can choose from a wide variety of sizes of blind rivets, which you can buy easily and simply. So, at the very beginning, you determine the size of exhaust rivets you need. Their price is determined precisely by the size, because in all other parameters they, in principle, do not differ from each other. All sold by us rivets are aluminum. The price of this material is not high, but the quality and reliability are quite worthy. It follows that aluminum exhaust rivets, the price of which, as we have already found out, are better than ever, despite their mass character, will be extremely reliable and durable.
By mass character, we mean the fact that it will not work to buy aluminum rivets by the piece. They are sold in packages. Each such package contains approximately 1000 aluminum blind rivets. The price for each piece is calculated by elementary formula. Just divide the total packaging cost by 1000 and you will find out that one single rivet aluminum price often does not exceed 50 kopecks. Even if you need large fasteners measuring 4.8x18, then in this case, the price of one piece for exhaust rivets will only slightly exceed the ruble. Agree, this is quite an acceptable amount, taking into account the fact that aluminum rivets are usually bought for their mass use. One rivet in the work will not do. So, if you have already decided to buy exhaust rivets and know the size you need, you just have to make a couple of clicks, after which the order will be sent for processing. Before you blink an eye, you have already managed to buy St. Petersburg rivets. And that's without leaving home!
We pass to the next position of the fasteners and hardware section - self-tapping drywall wood screws. Already in the name of this product is the word "gypsum plasterboard", which indicates that the GD self-tapping screw is ideal for drywall works. Of course, drywall is far from the only scope of its application. Since these are self-tapping screws for wood (the price for them is minimal today), they can be used both as part of woodworking industry products and directly with wood. Self-tapping screws of the State Duma enter it no worse than drywall. Considering the range of fasteners offered, you will surely notice that Special attention we give black wood screws. Yes, they are very visible wooden surface. But in this, it is believed, their great advantage. At least if you buy wood screws in St. Petersburg in black, you will definitely distinguish them from other fasteners in your box. Due to the fact that black wood screws have a characteristic shape, you will never try to screw them into metal, which, of course, they will not withstand. We draw your attention to the fact that you can buy wood screws in St. Petersburg only in a package, each of which contains 1000 pieces of products.
Another popular hardware product is the GM self-tapping screw. The two letters that appear after the name of the product itself carry the corresponding meaning, which is easy to understand. If in the past case, the GD meant "plasterboard wood", then in this case, we mean gypsum metal self-tapping screws. Similar to wood products, metal screws (you can always buy in our store) have a stylish and eye-catching black color. But their shape, especially in terms of the distance between the thread pitch, is different. Sold in a convenient plastic container, gypsum metal self-tapping screws - one of the most reliable ways to work with fastening metal surfaces regardless of the end goals. Depending on what load the surface will be subjected to, you will need to buy metal screws of the appropriate size. The larger the size, the greater the load the GM black self-tapping screw can withstand. But take into account the fact that the increase in the size of the product occurs not only in terms of its diameter, but also in terms of length, which may affect the progress of work with fasteners.
If you have to work on the improvement of the roof, then you simply cannot do without roofing screws St. Petersburg. Hardware of a special design allows you to strengthen not only roofing materials, but also the facade. Unlike the same self-tapping screws with a drill for metal, a package of roofing screws (the price in the catalog is indicated per package, not per piece) contains not 1000, but 250 pieces. This is explained both by the complexity of the execution of hardware, and the lack of special need for in large numbers roofing screws St. Petersburg when performing profile work.
In the hardware section, presented by the Baltopttorg online store, you will find such fasteners as self-tapping screws with a press washer. Not to say that this element belongs to the "exotic" fasteners, but it is intended for strictly defined tasks. In particular, self-tapping screws with a pressure washer, the price of which is still not so high for 1000 pieces, can be successfully used if there is a need to fix sheet plates. Pointed self-tapping screws with a pressure washer effectively fix the plates in a fixed position. The convenience of working with these elements is ensured by the presence of a hemispherical head in a recess for Phillips screwdriver. As in all previous cases, the price for self-tapping screws with a press washer is determined by their size. Well, what size is needed in your case, you decide for yourself, focusing on the upcoming work. We also suggest paying attention to self-tapping screws press washer drill, which are also used to work with sheet plates. If in the case of ordinary self-tapping screws it was a sharp tip that allows you to quickly penetrate deep into the surface, then the self-tapping press washer drill allows you to drill with greater fastening reliability, which is also important when fastening thick sheet plates.
Everyone has done renovations at some time or plan to do so in the near future. And usually you can’t do without self-tapping screws, since they are considered an excellent fastening material for use on various surfaces. This may be wood, drywall or one of the metal versions.
The first two materials are easy and convenient to work with, but the last one is not as easy as it seems at first glance. It has a more rigid structure and not all self-tapping screws are able to overcome it.
So that you are not mistaken with the purchase, you need to figure out which metal screws are best suited for your purpose. They are sold by weight or by the piece, and are not expensive, but usually you need a lot of screws, so a useless purchase will hit the budget.
Based on various points of sale, they are called self-tapping screw elements - this explanation is necessary so that you are not mistaken and aware of what is at stake. Although sellers should understand you from the first words of the explanation, what is needed fastener.
By the way, it is worth consulting with them, because this the right way buying what you need for your purpose. If you choose on your own without the necessary knowledge, then you will have to face a mass various options self-tapping screws, differing in size, material, shape.
You can look at the photo of metal screws, and make sure that it is difficult for an unprepared buyer to understand their diversity. Because of this, we will fill in the gap in your knowledge so that you understand why you are buying this fastener. Consider different kinds self-tapping screws, and we will especially focus on those created to work with metal.
Self-tapping screws for working with metal
They are of two types, and differ in some nuances. Let's look into them:
Self-tapping screws based on a pointed end are very similar to the classic type of screws popular in Soviet times. They are created using quality metal, and are supplied with successive threads with little inter-ridge space between them.
This is necessary to increase the quality of adhesion with a very hard kind surfaces - various metals. This species has the following characteristics:
- The diameter is offered in the region of 3.5 - 5.0 mm, and its level increases closer to the screw head;
- The length is usually around 10 - 50 mm based on threaded application in 5.0 mm increments;
- If the length reaches 60.0 - 100.0 mm, then the thread pitch will be in the region of 10.0 mm;
- Based on 110.0 - 120.0 mm will be about 15.0 mm;
- And with a length of 125.0 - 220.0 mm, threading is usually offered in increments of 20.0 mm.
Important: Now many manufacturers have appeared, and sometimes they produce self-tapping screws of this type with other parameters based on their own vision of their dimensions. Because of this, any version of such a fastener can be found on sale.
If you need to fasten something to metal with a thickness of 2 mm, then you do not need to create a preliminary socket, since a specialized self-tapping screw will do the job.
And, if the thickness turns out to be greater, then create a passage using a drill with a diameter smaller than that of the fastener by about 2.5 mm. Due to this, it will be possible to achieve a tight connection of the part with the metal.
Make no mistake and choose correct self-tapping screw for working with metal. For the manufacture of this type, a very durable metal is used, which has a galvanized or oxidized coating. They are found on the basis of metallic, gold or black.
Self-tapping screws with a drill bit are equally useful, as they are used for a slightly different fastening purpose. But in general, they are almost the same as with a pointed end. But there are a number of differences:
- Has a drill tip
- The hat is offered in the form of a cone or a press washer.
This species does not need to be pre-nested as it easily enters any metal and provides excellent bonding. This is facilitated by the unique shape of the cap of the fastener.
What is interesting about the option with a press washer?
If you remember, we have already mentioned self-tapping screws with a press washer, but, nevertheless, we will create for them separate description because they are different big size cap contact area. And due to this, they stand out noticeably among other types of self-tapping screws.
With the help of a special design, this fastener perfectly fastens various forms wooden slats and metal sheets having a thickness of 1.1 mm. But outwardly, it almost does not differ from its counterparts, since it is not supplied with a unique color, and usually has a silver color.
Only a professional who constantly works with them during various construction activities can figure out which self-tapping screw in front of him.
And what about the hexagonal view, why is it interesting?
Externally, hex head screws look like a bolt, and an unprepared buyer may not distinguish them in shape, but there are differences. Let's look into them:
- Possesses not accelerated screw thread;
- The end is pointed, but not too sharp compared to the version with its own drill.
Is used for secure fixation parts with large mass and dimensions. It can be screwed into wood or concrete, provided that a suitable dowel is used.
Important: The dowel to work with this fastener must have a diameter twice that of the self-tapping screw.
But working with this self-tapping screw is not easy, since you will need keys that have dimensions of 10, 13 or 17 mm. It depends on the size of the cap, the fasteners used.
And, as for the roof, special self-tapping screws are created?
Yes! Manufacturers produce roofing screws that differ from analogues not only in purpose, but also in other characteristics. Let's take a look at their features:
- Supplied with a drill end;
- They have a hexagonal head;
- Available with rubber washer.
The hexagonal head of this type has a size of 8 or 10 mm. And the rubber version of the washer is needed for two purposes:
- It is considered an excellent gasket with insulating properties, which helps to prevent moisture from penetrating under the cap surface;
- Creates an elastic seal for the connection, which improves its quality.
Now you have information about the most popular self-tapping screws for various purposes. Remember - it is very important to use a fastener that has the right characteristics. Otherwise, the connection will not be of high quality, and, possibly, an unforeseen situation with serious consequences in the form of damage to some objects or injury.
Photo of self-tapping screws for metal
The abundance of shiny fasteners on the shelves of hardware stores is pleasing to the eye, but makes it awkward to stomp at the window of every person who is not professionally involved in the implementation of fastening equipment. The purpose of half of the screws is not clear, and it’s kind of awkward to ask the seller ... Let's try to understand the variety of screws - self-tapping screws presented on modern market. After 5 minutes, you will be surprised to find that everything is much easier than it seems.
Screw - self-tapping screw. Where does the confusion come from
What is the difference between a screw and a self-tapping screw? I suggest looking into GOST 27017-86, which gives the following definition of a screw:
Screw - a fastener in the form of a rod with an external special thread, a threaded conical end and a head at the other end, forming a thread in the hole of the connected wooden or plastic product.
As follows from a document dated 1986, the use of this type fasteners involved pre-drilling a hole and limited the material of the fastened elements to wood or plastic. For this type of screws, brass, low-carbon steels (St1, St2, St3, 10kp) or corrosion-resistant steels without electroplated coatings. As a fastener, the classic screw is not very popular, but today it is still found as a cheap alternative to self-tapping screws.
A self-tapping screw is a new stage in the evolution of fasteners. Formally, it corresponds to the definition from GOST, which we cited above, but has significant design differences (the shape of the slot, coil, thread and tip) and is made of high-quality steels with corrosion-resistant coatings.
As the name suggests, a self-tapping screw can cut threads on its own and is used without pre-drilling holes. A self-tapping screw can handle not only wood and plastic, but metals, concrete, brick, etc. Given the variety of fasteners, it is useful to know their sizes and classification. Below are convenient tables for each type.
Decryption example
Screw 1 - 4×25 GOST 1145-80
Screw 4 mm diameter, 25 mm long, mild steel, not galvanizedStandardized marking looks like this, but in practice everything is much simpler. On the box that you take from the shelf, only the purpose of the screws and their dimensions will be written.
Standard sizes of self-tapping screws - screws
The size of a self-tapping screw is determined by only two values: length and diameter.
Universal screws
They are usually made with incomplete thread. Used for wood, chipboard, etc. soft materials. Self-cutting properties are low. By standards GOST 1144-80, 1145-80 , 1146-80 are available in diameters 1.6, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0, 8.0, 10.0 mm and lengths 13, 16, 20, 25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100, 110, 120 mm.
| Ø mm | length, mm | Ø mm | length, mm | Ø mm | length, mm | Ø mm | length, mm | Ø mm | length, mm |
| 2.5 | 10 | 3.0 | 10 | 3.5 | 10 | 4.0 | 13 | 5.0 | 16 |
| 13 | 13 | 13 | 16 | 20 | |||||
| 16 | 16 | 16 | 18 | 25 | |||||
| 18 | 18 | 18 | 20 | 30 | |||||
| 20 | 20 | 20 | 22 | 35 | |||||
| 22 | 22 | 22 | 25 | 40 | |||||
| 25 | 25 | 25 | 30 | 45 | |||||
| 30 | 30 | 40 | 50 | ||||||
| 40 | 45 | 60 | |||||||
| 50 | 70 |
Self-tapping screws for wood, chipboard, fiberboard, plastics
One of the most common self-tapping screws. Used for dowel mounting. Comes with galvanized finish white color) or galvanized and chromate passivated ( yellow color), sometimes treated with phosphate.
| Ø mm | length, mm | Ø mm | length, mm | Ø mm | length, mm | Ø mm | length, mm | Ø mm | length, mm | Ø mm | length, mm |
| 3.0 | 10 | 3.5 | 10 | 4.0 | 12 | 4.5 | 16 | 5.0 | 16 | 6.0 | 30 |
| 12 | 12 | 16 | 20 | 20 | 40 | ||||||
| 16 | 16 | 20 | 25 | 25 | 45 | ||||||
| 20 | 20 | 25 | 30 | 30 | 50 | ||||||
| 25 | 25 | 30 | 35 | 35 | 60 | ||||||
| 30 | 30 | 35 | 40 | 40 | 70 | ||||||
| 40 | 35 | 40 | 45 | 45 | 80 | ||||||
| 40 | 45 | 50 | 50 | 90 | |||||||
| 45 | 50 | 60 | 60 | 100 | |||||||
| 50 | 60 | 70 | 70 | 120 | |||||||
| 70 | 80 | 80 | 140 | ||||||||
| 90 | 160 | ||||||||||
| 100 | 180 | ||||||||||
| 120 | 200 |
Capercaillie screw with hexagonal head
DIN 571 and GOST 11473-75. Designed for fastening logs, rails and other tasks that require enhanced fixation. Usually galvanized.
| Ø,mm | length, mm | Ø mm | length, mm | Ø mm | length, mm | Ø mm | length, mm |
| 6.0 | 30 | 8.0 | 40 | 10 | 40 | 12 | 100 |
| 40 | 50 | 50 | 120 | ||||
| 50 | 60 | 60 | 140 | ||||
| 60 | 70 | 70 | 160 | ||||
| 70 | 80 | 80 | 180 | ||||
| 80 | 90 | 90 | 200 | ||||
| 100 | 100 | 100 | 230 | ||||
| 120 | 120 | 120 | 250 | ||||
| 160 | 140 | 140 | 280 | ||||
| 180 | 160 | 160 | 300 | ||||
| 180 | 180 | ||||||
| 200 | 200 | ||||||
| 220 |
Screws for fastening to metals
Screws according to DIN 7981, DIN 7982, DIN 7982
Visually similar to universal ones, but differ in materials of manufacture, lead angle and thread profile angle (up to 60 degrees).
| Ø,mm | length, mm | Ø,mm | length, mm | Ø,mm | length, mm | Ø,mm | length, mm | Ø,mm | length, mm | Ø,mm | length, mm |
| 3.5 | 13 | 3.9 | 13 | 4.2 | 13 | 4.8 | 16 | 5.5 | 16 | 6.3 | 16 |
| 16 | 16 | 16 | 19 | 19 | 19 | ||||||
| 19 | 19 | 19 | 22 | 22 | 22 | ||||||
| 22 | 22 | 22 | 25 | 25 | 25 | ||||||
| 25 | 25 | 25 | 32 | 32 | 32 | ||||||
| 32 | 32 | 32 | 38 | 38 | 38 | ||||||
| 38 | 38 | 38 | 45 | 45 | 45 | ||||||
| 45 | 45 | 50 | 50 | 50 | |||||||
| 50 | 50 | 60 | 60 | 60 | |||||||
| 70 | 70 | 70 | |||||||||
| 80 | 80 |
Screws according to DIN 7504
Structurally, they are almost completely identical to pointed metal screws DIN 7981, 7982 , 7983 (see table above). Key difference- a tip that performs the function of a drill.
| Ø,mm | length, mm | Ø,mm | length, mm | Ø,mm | length, mm | Ø,mm | length, mm | Ø,mm | length, mm | Ø,mm | length, mm |
| 3.5 | 13 | 3.9 | 13 | 4.2 | 13 | 4.8 | 16 | 5.5 | 22 | 6.3 | 22 |
| 16 | 16 | 16 | 19 | 25 | 25 | ||||||
| 19 | 19 | 19 | 22 | 32 | 32 | ||||||
| 22 | 22 | 22 | 25 | 38 | 38 | ||||||
| 25 | 25 | 25 | 32 | 45 | 45 | ||||||
| 32 | 32 | 38 | 50 | 50 | |||||||
| 38 | 38 | 45 | |||||||||
| 50 |
Self-tapping screws for sheet metal and metal-based products
Self-tapping screws with a press washer
They are found on sale both with a drill (for metal up to 2 mm thick) and a sharp tip (designed for metal up to 0.9 mm). Standard diameters 4.2 (4.0) mm and length - 13, 14, 16,
18, 19, 22, 25, 32, 41, 51 mm.
Self-tapping screw with a semi-cylindrical head ("bug")
Similarly to its predecessor, it can be both sharp and with a drill. This self-tapping screw does not have a dimensional ruler and it is found in a single dimensional version:
With a sharp tip - 3.5 x 11
With a drill tip - 3.8 x 11
Self-tapping screws with hexagonal head
Designed to work with sheet metal without prior hole preparation. Provides reinforced fastening. From one manufacturer to another, variations in the dimensions of products in this segment of fasteners are possible. The tables below show the most popular ones.
With a sharp tip.
For metal sheets up to 0.9 mm.
With drill (DIN 7504-K)
For thick metal (5mm or more). The length of the tip - the drill determines the max. sheet metal thickness.
| Ø,mm | length, mm | Ø,mm | length, mm | Ø,mm | length, mm | Ø,mm | length, mm |
| 4.2 | 19 | 4,8;5,0 | 14 | 5.5 | 19 | 6.3 | 19 |
| 21 | 19 | 25 | 25 | ||||
| 25 | 25 | 32 | 32 | ||||
| 32 | 38 | 38 | 38 | ||||
| 45 | 51 | 45 | |||||
| 51 | 64 | 51 | |||||
| 64 | 76 | 64 | |||||
| 76 | 76 | ||||||
| 90 | |||||||
| 102 | |||||||
| 127 | |||||||
| 152 |
Self-tapping screws for drywall
Manufactured with countersunk conical reduced head, cross slot, two-start variable profile threads and a sharp tip. Dimensions of fasteners for mounting on wooden frame or a metal profile with a thickness of less than 0.9 looks like this: Ø 3.9 mm with lengths of 19, 25, 30, 45 mm.
Self-tapping screws for fixing boards and sheets of chipboard, fiberboard, plywood
As a rule, these are galvanized screws (FLUGEL) with a size of 5.0 x 36
Meet with a countersunk conical head and notches for countersinking a countersunk hole ( DIN 7504P) with dimensions:
Roofing screws
When installing the roof, it is advisable to use standard galvanized self-tapping screws. They are not susceptible to corrosion. The table with a dimensional ruler looks like this:
| Ø,mm | length, mm | Ø,mm | length, mm | Ø,mm | length, mm | Ø,mm | length, mm |
| 4,80 | 20 | 5,50 | 19 (20) | 6,30 | 19 (20) | 7,00 | 122 |
| 29 | 25 | 25 | 142 | ||||
| 35 | 32 | 32 | 162 | ||||
| 38 | 38 (40) | 38 (40) | 177 | ||||
| 50 | 51 (50) | 50 | |||||
| 60 | 64 (62) | 60 | |||||
| 70 | 76 (78) | 70 | |||||
| 80 | 100 | 80 | |||||
| 115 | 90 | ||||||
| 130 | 100 | ||||||
| 150 | 130 | ||||||
| 180 | 150 | ||||||
| 235 | 175 | ||||||
| 200 | |||||||
| 235 |
Roofing screws with painted heads are available. paint creates additional protection from impact external factors. And they do not spoil the exterior of the roof, as they are "selected" by color.
Screws and self-tapping screws for special purposes
Confirmates
Confirmat or "euro-screw" is a separate category of fasteners. It is designed to assemble furniture panels. Manufactured with various protective decorative coatings(usually galvanized). The thread pitch is rare. The task is to pull the parts to each other. The head has characteristic difference. A special hexagon is required for screwing.
Screws for concrete
Screwed into a pre-drilled hole. The use of a perforator is not recommended. Hence the complexity of the process. Before screwing, you need to drip machine oil This will make the process a little easier. Type of fasteners, which is called "forever". Withstand high loads(up to 100kgs). There are: Ø 7.5 mm. Length: 50, 70 (72), 80, 90, 100, 120, 130, 140, 150, 160,180, 200,… mm.
Window screws
Hole preparation is not required. They work as "amplifiers" of windows and have the following dimensions: Ø 3.9 mm, lengths: 13, 16, 19, 22, 25, 32, 35, 40 (38), 45 mm.
Frame screws
Large screws with high strength. They are screwed into the dowel and sometimes come with it.
Adjustment screws
A characteristic feature is the second thread. The first thread (usually smaller) is necessary for fastening to the base, the second serves for mounting the substructure.
Screws are popular screws ∅6 mm and length: 60, 70, 80, 90, 100, 110, 120, 130, 145 mm.
Screws for scaffolding
Nail screws
Screws for hangers
They are very convenient in everyday life, for example, for several years we have been hanging a children's swing on such fasteners in the corridor of a city apartment. Installation and removal time - literally 1 second! There is no single standard for the dimensions of this element, and each production forms size ruler at your own discretion.
Cheat sheet for the home master
The following tables will help guide you in choosing the right fastener.
We distinguish the product by type of thread
Self-tapping screws differ in the frequency of turns. A small pitch allows the use of fasteners for metal parts. Screws with sparse threads are designed for materials with low density. This includes: asbestos, gypsum, plastic and so on. In appearance, self-tapping screws can be classified as follows:
|
thread pitch |
Special purpose |
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Universal self-tapping screws. Designed for fastening objects from any materials (they are the most common). |
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Frequent, |
Designed for attaching to metal profiles up to 0.9 mm thick without the use of dowels (required preliminary preparation holes, |
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Self-tapping screws for attaching parts made of soft materials (wood, gypsum plastic, asbestos, and so on) without the use of dowels. |
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Medium, with |
Self-tapping screws for screwing into reinforced concrete or brick objects of buildings by driving into a dowel. |
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asymmetrical |
Self-tapping screws for fastening elements modern furniture from wood, chipboard, plywood, etc. (pre-drilling a hole with a diameter of 4.5 or 7 mm, respectively, is necessary). |
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Alternating notched |
Self-tapping screws for attaching to reinforced concrete or brick parts of buildings without dowels (pins), (screwed into a hole with a diameter of 6 mm and a depth of 15 mm greater than the immersed part of the self-tapping screw). |
It's all about the hat
By the shape of the cap, you can determine the purpose of the self-tapping screw. The relationship between these parameters is shown in the table:
|
hat type |
Features and purpose |
|
secret |
After screwing in, the cap is completely recessed into the object to be fixed without a protrusion. |
|
Profile - hemisphere |
Strongly holds the attached part due to the increased area of the clamping cap. |
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Profile - hemisphere with a small press washer |
Possesses larger area working surface hats and its underestimated height. It is used when mounting sheet materials. |
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Small secret |
It has a small working area and a gentle transition from the cap to the threaded stem. During installation, it is fixed both in a stationary object and in an attached part. Allows you to apply much more force during the mounting process than in the case of a conventional blind hat. |
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Profile - a hemisphere with a large press washer |
It has a larger working clamping area and a lower head height. Purpose - attachment of sheet parts of low density. |
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Hexagonal |
The head configuration allows you to tighten the screws with less effort, achieving a strong pressing of the fastened objects. |
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Funnel-like secret with a thickening on the body of the rod |
Allows you to mask the connection. Makes it possible to close the hat with a decorative plastic cap. It is screwed in with a specific key (4 mm). |
The fact that a lot of effort has been spent on screwing in does not speak of the titanic torments that will have to be experienced if it becomes necessary to unscrew the screw. Therefore, every time the "forever" method is advised, it is worth considering the expediency. Manufacturers offer a variety of self-tapping screws, differing in the metal from which they are made. The cost also varies. In order not to overpay, you need to give an objective assessment of the load that will be subjected to fixing unit. If we are talking about a "carnation" for a picture on wooden wall, it does not make sense to spend money on expensive screws.
The tool for screwing is used both manual and electric. Often a screwdriver is sufficient. This method will not allow high performance labor when it comes to professional work and large amounts of fasteners. For work, the familiar screwdriver is optimal.
Slot - smile :) Unbelievable, but true
The Japanese plant Komuro Seisakusho has released a batch of fasteners with a non-standard slot in the form of a smiley. The author of a funny idea is designer Yuma Kano. Unfortunately, the novelty has not yet been presented on the domestic market. 
We hope that now you have once and for all sorted out the issue of the purpose and size of the fasteners. We will be grateful for recommendations, criticism and discovered inaccuracies.
Among the wide variety of fasteners, it is difficult not to get confused. Self-tapping screws and screws are fasteners consisting of a rod with a sharp thread and a head. They are different in length, thickness, material, shape, purpose. For a certain type of work, specific screws are used. There are, of course, universal fasteners, but they are far from always suitable and securely fasten this or that material. Let's take a closer look at their purpose.
What is the difference between a self-tapping screw and a screw? The main difference is in the carving. The barrel of the self-tapping screw consists entirely of a threaded part or has a length of a smooth part shorter than a threaded part. The tip of the screw is sharper than the end of the screw. Screws are made from soft species steel, self-tapping screws - solid.
Modern self-tapping screws are made from special hardened steel and are protected from corrosion. Due to surface treatment, hardware is produced different colors. Most often they are galvanized (yellow and silver) or black (oxidized or phosphated).
According to the scope of application, self-tapping screws are divided into the following:
For wood material
For drywall
For metal sheets
For sandwich panels
For window profiles
Self-tapping screws for wood and plastic
They differ from all others by a rare thread pitch. they look like a trunk with a rare carving and a countersunk head, the hat is easily recessed into the tree and does not interfere with further surface processing of the material. A rare step on the screw is made taking into account the structure wooden materials to avoid wood chipping and more secure fastening.
Used as drywall fasteners wooden crate, for fastening wooden elements with each other without pre-drilling holes. For this, black screws are most often used.
Furniture self-tapping screws (confirmat, euroscrew)
They are used in the manufacture and assembly of furniture. Made in the form of a metal rod with a rare and high thread, and a blunt end. Hat flat shape, there is a thickening near the cap. During installation, as a rule, a hexagon wrench of the 6th diameter is used. Requires pre-drilling. Heads can be closed with decorative ones.
Self-tapping screws for window profiles
They have the form of a rod with a drill at the end or a sharp tip, and a countersunk head. Mainly used in production plastic windows for panels to metal profiles. Material - steel, covering - white and yellow zinc.
Screw for concrete
Sometimes called a nagel. They are used to fasten parts to a solid base. The most common pins are divided into two types:
With cylindrical head;
With hidden head.
They have a special uneven thread along the entire length to create a special fastening strength. Nagels are used for fastening wooden, aluminum structures to a concrete (brick) base.
Capercaillie screw
Very thick screw, perfect for heavy structures, where special strength is needed (slats, beams, bars, and so on). Requires pre-drilling a hole. Hat hex, turnkey or hex bit. The thread may be full length or slightly short of the head. This fastener is often used to install plumbing, water heaters. Fastening with the help of very strong and able to withstand fairly high loads. Before twisting, you must first make a hole with a drill.
Having familiarized yourself with the types of self-tapping screws and their purpose, you can securely fasten any elements together. You can buy self-tapping screws of any type in the Dom online store with delivery or pickup.