1. What are the common specifications of self-drilling screws?
There are four common specifications for drill tail screws, which are 4.2, 4.8, 5.5, and 6.3mm, and the length can be customized according to requirements. In addition, there are different materials, such as some are iron, and stainless steel, stainless steel has many different materials to choose from.
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2. What is a self drilling screw?
1). This screw is a new invention. It can be rotated in a loop through an inclined plane, providing friction, and slowly tightened. It has a self-tapping drill screw at the front end, also called a self-drilling screw, which is mainly used for fixing colored steel tiles in steel structures. However, it cannot be used for metal-to-metal fixings.
2). According to the structure of the drill tail, there are several different types, one is cross-type, one is countersunk type, and the other is trumpet type or hexagonal or round.
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3. What are the classifications of screws?
1). A screw is a type of fastener. There are many kinds of commonly used screws. Depending on its material, the most commonly used are carbon steel or stainless steel. Stainless steel is made of 201, 304, and 316 materials.
2). It can also be divided according to the shape of the head. For example, some are cylindrical heads or countersunk heads, and they are divided into semi-sunk heads. There are also spherical cylindrical heads, hexagonal heads, etc. The head can also be divided into different types, which can be effectively distinguished.
3). According to the scope of use, some are used in the mechanical range, and some are suitable for self-tapping screws used between metal and plastic. Or carpentry screws and cement wall screws, and some are used for stainless steel end screws, or for the installation or engineering of stainless steel plates. For the installation of other equipment, such as the car compartment, it is necessary to select the appropriate screws.
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