What is a resistant screw?
One of the important categories that are done on screws is their division in terms of strength or strength grade. In this category, screws are divided into three types of normal resistance (low), medium resistance and high resistance. High strength screw has the highest strength grade. The high-strength screw provides a connection with higher strength and has a higher durability and longevity against applied stresses and forces. This group of screws includes two grades 100, 120 and 140. 100 and 120 grade screws are more commonly used, and 140 grade is only used for super heavy duty applications. Because it has a high price due to the difficult and expensive production process.
High -resistant screw features
As we said, screws with grade 100, 120 and 140 are high strength screws. But what do these numbers mean? What are the characteristics of high strength screw? The above numbers indicate the ultimate tensile strength of the screw. The larger these numbers are, the higher the strength of the screw. Grade 100 has an average ultimate tensile strength of **** megapascals, for grades 120 and 140, the tensile strength is **** and **** megapascals, respectively. The strength of the screw is affected by its material or chemical composition and the processes that are performed on them during production. This high tensile strength has caused the high-strength screw to create a connection with acceptable strength. High strength screws have yield strength and acceptable hardness. Therefore, it can be said that they provide excellent mechanical properties. In many applications, especially heavy applications, we need PUBs with excellent mechanical properties to provide a secure and strong connection.
The use of resistance screws in various industries
The difference between ordinary and resistant screws
The difference between normal and high-strength screws is in the strength and overall mechanical properties that these screws provide. A normal screw has moderate strength and normal mechanical properties. But the high-strength screw has high strength and favorable mechanical properties. But what does this difference in the strength of the normal and high-strength screw come from? Mechanical properties are among the properties that depend on the chemical composition and production processes of screws. The effect of the carbon element in the chemical composition of steel has a great impact on the strength of steels. The higher the carbon percentage of the steel screw, the stronger the screw. A normal screw is a screw with a low carbon percentage, while a high strength screw has a high carbon percentage.
Production processes are also effective in screw strength. For example, the heat treatment process improves the structure of the steel screw and then improves the mechanical properties. Therefore, a precise and engineered heat treatment process is usually performed on the high-strength screw.
Nutrition Bolt - Building skeleton
When we talk about bolts and nuts, it is not a specific type of bolts and nuts, but a group of bolts and nuts that are used in this industry. In different parts of the foundation or shed configuration or other similar structures, bolts and nuts with characteristics suitable for that part are used. In the following, we will introduce the types of bolts and nuts that are used in the construction of sheds and other metal structures.
Niche
In the shed building industry, it is one of the largest industries and the built sheds are used in other industries. The foundation of a shed is made up of different parts that are connected to each other by bolts and nuts to meet the needs of that part. Therefore, a variety of bolts and nuts are used in building sheds. The variety of shed bolts and nuts includes all types of bolts and nuts in terms of geometry and model, material and strength.
Types of bolts in terms of geometry and model
Bolts and nuts are designed in different types in terms of geometry and model. Each of these models has its own features and characteristics and is suitable for use in a specific application.
Cylindrical screw
Cylindrical screw or machine screw is a screw with a cylindrical screw head and of course with a small thickness, which is available in four-sided and two-sided models. Cylindrical screw is one of the most practical industrial screws. One of the most important applications of this screw is in the shed construction industry. This screw is available in two-sided and four-sided models. In addition, you can get this screw in the size and material according to your application needs.
Six -ear screw
The hexagon screw or spanner screw is a type of screw with a hexagon head and a threaded body. This screw is one of the most widely used screws in the industry. The hexagon screw is one of the screws with a flat end and a nut is used with them. This screw provides high strength in the connection and is used in heavy connections. This screw is available in different sizes and materials to suit your application needs.
Allen screw
Allen screw is another widely used screw in shed construction industry. The Allen screw has a cylindrical head and a socket. To open and close the Allen screw, a special Allen key is used, which is placed inside the socket of the screw head and by turning it, it opens and closes the screw. This socket head and the method of opening and closing has made it possible to use the Allen screw in tight places and places where it is difficult to open the screw with a wrench and other tools. The Allen screw has the ability to create a connection with high strength. The Allen screw, like other screws, has a size and different materials are used in its construction.
IMP
A metric screw is a threaded rod that is used to connect two different parts and is actually the interface between two different parts of a structure. A metric screw is one of the screws used in the industry of sheds and other metal structures. Metric screws, as the name suggests, are long rods that are cut to the size desired by the customer. This screw is produced in different thread diameters and dimensions. You can also buy metric screws from iron, different grades of steel, steel and plastic, according to your application needs.
Bolt
Shirvani screw is one of the other screws used in shed construction. This screw has a hexagonal and grooved head and a threaded body. The gable screw is one of the automatic screws and it is available in two models, pointed and dull. Plastic and metal washers are used along with gable screws. Therefore, this screw has a high sealing ability and is usually used in the parts of the shed roof where there is a possibility of water and moisture leakage.
Hexagonal beads
The hexagonal nut is a nut with hexagonal geometry, which is the most widely used type of nut. This nut is used next to many screws and tightens the screw in the connection. You should pay attention that the dimensions and type of nut thread match with the screw thread so that a proper connection can be made. The most widely used hexagonal nuts are steel and dry nuts. These beads have sizing and you should get it in the right size for your use.
