Shirvani screw
The gable screw has a drill end that is suitable for entering and opening thick metal plates such as gable sheets and metal Iranians and other metal objects.
The presence of a drill at the end and a plastic washer under the mud of this screw has made steps such as drilling a hole and sealing (the hole that has been created) removed for the installers of gable and metal roofs and has made the work easier.
The most important feature of the flex gable screw is the presence of a plastic washer, less installation torque and a much faster installation time than other screws when working with it.
Therefore, choosing the right gable screw increases the installation speed and reduces costs.
The use of low-quality screws reduces the lifespan of the roofs and the corrosion of the metal sheets.
screw
The self-tapping screw is a self-tapping screw that is used in various connections due to its shape and size.
The main difference between self-tapping screws and self-tapping screws is in their tips.
The tip of self-tapping screws consists of a drill-like part, which makes it easier to use in connections.
The drilled tip of these screws means that there is no need to drill the desired surface before using them.
This makes their use easier and the speed of working with them increases.
The material of the screws is often galvanized and stainless steel.
Head screws can be used for wood, iron and aluminum connections.
Shirvani screw
Baksi self-tapping screws with washers are similar to Shirvani self-tapping screws and are one of the most widely used types of self-tapping screws.
Typically, its thickness is 6 mm and its size ranges from 1.25 cm to 15 cm.
Having a plastic washer under the bolt makes it insulated against liquids and dust.
To close these screws, you need a box wrench that is connected to the drill.
This screw is also known as Sirvani screw among people.
Plain screw with washer
The thickness of this screw is commonly 4.2 mm and its length is often from 12 mm to 100 mm.
The washer of these screws makes the pressure spread better and more appropriately on the surface.
Due to the size of the four-way head screw, this type of screw requires a four-way or two-way screwdriver series to be connected to the drill as an intermediary.
Head screw
Due to the flatness of this screw, the screw is placed inside the work and the work surface, and it is suitable for cases where we do not want the screw to protrude from the desired surface.
The thickness of these screws varies from 3.5 to 4.8 mm and the size varies from 12 to 100 mm.
The four-sided head screw of this type of screws requires a series of four-sided or two-sided screwdrivers to connect them to the drill.