Features of anchor bolts with nuts and their size

    Construction is a very important sphere in our lives with which everyone meets. Because of the need for high-quality buildings and other architectural projects, this area is becoming more and more new tools. One of them is an anchor bolt, which is a modification of an ordinary bolt. In this article, we will talk about their subspecies – anchor bolts with nut, features, tips on choosing and fixing structures.


    Anchor bolts are a pretty new device that modern builders enjoy. His main and ultimate goal – consolidate heavy and large. The bolt itself should be strong, and its fastener method is reliable.

    This product has a rather simple appearance and a simple principle of work. Bolt base – metal rod with proper threaded. Such a part is all kinds and subspecies of the bolts. The characteristic feature of the anchor bolts is the presence in the lower part of the cone shape. And also the threads of the hope of a kind of “shirt”, which performs a very interesting and important function. Top on the threads put on nut.

    So, deal in how an anchor bolt with a nut. “Shirt”, that is, a cylindrical sleeve, has slits located along the main threaded rod. After a bolt is inserted into a specially cut hole, a nut is put on it. As the nut twisted, that is, its tightening, the rod begins to crawl up, and its cone-like part, which is located below, starts to break the sleeve. Thus, after a while, the cone-shaped part almost completely will enter the sleeve and will expand it by a value equal to the diameter of the cone base. Extended sleeve will keep the details fastened.

    The purpose of the washer under the nut is also a simple. It is necessary in order for the nut does not start to go inside the metal sleeve during the tightening.

    Review of species

    In general, an anchor bolt with a nut – this is one of the varieties of building anchor bolts. But this item also has a division into groups. In order to figure out which each type is used, it is necessary to consider their characteristics.

    So, at the moment there are two types of anchor bolts: ordinary and two-spoken.


    Anchor bolts with nut, which have only one sleeve. Differently they are called flutter anchors. In general, this option is the most common, because of which it began to be considered ordinary. Such devices in some cases are used in private construction. It is worth noting that the principle of operation of ordinary anchor bolts is very similar to another view – Wedge.

    Such a bolt has two interrelated features. The first of these is the presence of only one holding sleeve, which leads to the use of the bolt only when the loads are not close to extreme. The second feature – due to one bushow, the bolt is delayed easier than his subspecies-competitor.

    It is important to clarify that bolts are made from different materials, so when choosing this type of anchor bolts, it should be considered from which they are produced.

    Thus, this type is more suitable in the case when it is necessary to restrain high loads, but not extreme.


    Very similar to the ordinary anchor bolt with a nut is another subspecies of such bolts – two-spoken. In general, the principle of work they have the same. However, there is one important difference from which all the other of its features flow. This is the difference – the presence of two fastening sleeves instead of one.

    This leads to a more rigid and reliable coupling of two parts. The use of such bolts is recommended exactly when you need to connect two large and hard items. This is a certain plus of this type. However, there are also cons, and one of them – more tight tightening of the bolt. And, indeed, it is much harder to drag two cones instead of one bushings instead of one.

    With a private or other small volume of construction, the use of two-spoke bolts inefficiently.

    Sizes and weight

    The choice of anchor bolts, like many other products, is worth orienty on various indicators prescribed in Guest. It is there that the product parameters are described: size, weight, the level of maximum permissible load and so on.

    If you carefully consider the positions of the GOST, you can see that the most small anchor bolt is a bolt with dimensions of 5×18 mm. However, despite this, it withstands quite large loads, if made of high-quality material.

    The sizes of anchors are very important. When choosing it is worth navigating the thickness and length recorded in Guest.

    By comparing the task you want to perform, with the size of anchors, you can choose the optimal option.

    Here are some sizes that are used in the production of anchor bolts with nuts:

    10×100, 12×100, 8×100, 10×97, 12×150, 20×300, 10×150, 10×77, 8×85, 12×60, 12×129, 10×250, 10×50, 10×60, 6×40, 10×200, 20×150, 6×60, 8×40, 12×200, 16×150, 10×120, 16×110, 8×50, 8×120, 12×300, 10×80 mm.

    And also dimensions, indicating the diameter of the thread: M8X65, M8, M10, M8X35.

    Gewntan tables use several concepts.

    • MPF – minimal exhausting force that is measured in kilonitytons. It can be in values ​​of 8, 10, 13, 18, 22, 27, 46.

    • Totam – The thickness of the material that will be attached by the bolt. This indicator varies greatly in different limits – from the thinnest 5-6 mm to a thickness of 300 mm.

    • L – Bolt length, namely: rod and nuts on it. Length also has different meanings. Little anchors have a length of 18 to 100 mm. Medium-sized bolts are instances from 100 to 200 mm, and the largest anchors reach 360 mm in length.

    • N – depth.

    • Tloth – the length of the hole in which the anchor must twist.

    Judging by this table, we can say that the minimum length of anchors at the moment – 18 mm. Maximum This indicator reaches 400 mm. The diameter of the sleeve cannot be less than 6.5 mm. In this case, you can trace an interesting dependence – the larger the length of the anchor bolt, the greater its diameter.

    And it is logical, because otherwise, with an increase in the length, the strength of the anchor would decrease.

    Tips for choosing

    In the modern world, when shops are filled with various goods, it is very important to know what you need to not buy an unnecessary and useless thing. The following tips will help to understand the assortment of anchor bolts to make more competent purchases.

    So, the first thing to pay attention to, – the length of the anchor. Different models long a lot. The length is to choose a relatively thickness of the material attached and the base material to which any part will be attached. The more these indicators, the greater the length of the anchor it is worth purchasing. However, you need to be neat with this indicator. If you choose too short option, then you do not have enough tightening force.

    If you choose too long anchor, it can break through the base – wall, ceiling, and so on.

    It is worth paying attention to another no less important aspect – the compliance of the GTA adopted in the Russian Federation. This is very important, despite the statements of some not very good suppliers that their goods do not correspond to GOST, but still qualitative and reliable. In fact, no one can not know how things are actually about, but compliance with generally accepted standards helps to be confident in their purchase.

    The material of the anchors is not decisive, but it is better to use better model in important attachments. So, in those places where there is a risk of corrosion, it is worth purchasing special stainless steel anchors.

    And, of course, the maximum load that bolt can withstand. This is exactly one of the decisive factors. But here is not so simple. Many experts advise to put those anchors that have a maximum load “with a stock”. That is, if the product passport is exactly the value you need, then such a bolt is not suitable. It is better to take the product, which is 4 times more withstanding the load.

    This will ensure safety and reliability.

    How to put on the wall?

    After an anchor bolt with a nut purchased, you can proceed to its use. In order to understand how this process occurs, you can consider a specific case – an anchor attachment into the wall.

    To properly install a bolt in the wall, you need to stick to a simple instruction. First of all, you must choose and designate the place where anchor mount will be. After that it is worth using special tools in the form of a drill or a drill and drill a hole. The diameter and length of the opening must be calculated depending on the parameters of the anchor and the attached part.

    Diameter can be configured by selecting the correct bead, and the depth – manually in the drilling process.

    The next stage of the installation involves cleaning the hole. To do this, you can use a special pistol with compressed air or a common homemade vacuum cleaner.

    After that, it remains only to insert and spin the anchor bolt itself, without forgetting the most attached part.

    Anchor bolts with nuts are very common in the construction sector and are used not only when erecting private houses, but also high-rise buildings. They have their own varieties, each of which has special properties.

    Using the selection and installation tips, you can successfully use this device yourself.

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