Screw is a kind of commonly used fasteners composed of two parts: head and screw. It is mainly used to connect fixed parts, and most of them play the role of fastening and easy installation and disassembly. With the screw used more and more widely in our daily life, in addition to the recognition of its advantages, people began to pay attention to its classification and specifications.

slotted common screw

More used for the connection of smaller parts. It has pan head screws, cylinder head screws, semi-countersunk head screws and countersunk head screws. Pan head screws and cylindrical head screws have high nail head strength and are connected to ordinary parts. The head of the semi-countersunk head screw is arc-shaped, and its top is slightly exposed after installation, and is beautiful and smooth. It is generally used for instruments or precision machinery. Countersunk head screws are used where nail heads are not allowed to be exposed.

Hexagon socket and hexagon socket screw

The head of this kind of screw can be embedded in the component, can apply a larger torque, the connection strength is higher, can replace the hexagon bolt. Commonly used in the structure requires compact, smooth appearance of the joint.

Cross recessed plain screw

It is similar to the use of slotted ordinary screws, can be replaced with each other, but the cross groove ordinary screw groove strength is higher, not easy to twist bald, the appearance is more beautiful. When in use, it must be loaded and unloaded with the matching cross-shaped screwdriver.

1. ordinary nail

Ordinary nails are made of a fixed iron wire or steel wire. They are generally straight, with sharp ends and a slight bend in the middle to insert and fix objects. Ordinary nails are often used to fix woodworking and furniture, and can also be used to fix picture frames and other lightweight items.

2. thread nail

Threaded nails are also a type of nail used to fix objects. Compared with ordinary nails, threaded nails have a threaded structure on their heads, which can better fix objects. The thread structure of the threaded nail can make the nail better fixed on wood, wall board, concrete and other hard materials.

3. the difference between ordinary nails and threaded nails

The main difference between ordinary nails and threaded nails is their different structure. The ordinary nail is made of a piece of steel wire with sharp ends. The head of the threaded nail has a threaded structure, which can better fix the object. In contrast, threaded nails are more suitable for fixing heavy objects and hard materials.

4. method of use

The method of using ordinary nails and threaded nails is also different. For ordinary nails, we can directly use pliers or hammers to nail into the object to be fixed. For threaded nails, we need to use a threaded nail drill to drill the hole, and then use a screwdriver to screw the threaded nail into the hole.

Generally speaking, ordinary nails and threaded nails have their own use scenarios and scope of application. When using, we need to choose the right nail according to the needs, and pay attention to the use method and precautions.

Cement nail is a fixed tool made of stainless steel or high-strength steel, which is widely used. It is called cement nail because it is more dense than cement and easier to integrate into cement structure. Ordinary nails are usually made of materials such as iron and steel.

Cement nails are mainly used to install various products on basic materials such as cement and concrete. Due to the strong adhesion of cement, if you use rubber gaskets and ordinary screws and nuts to fix the equipment, it is easy to cause the fixing parts to loosen. At this time, the installation of cement nails can better solve this problem.

Ordinary nails are mainly used to fix wood, iron and other small decorations or other materials to the wall or other surfaces. Their hardness is small, the strength is low, suitable for light decoration.

Cement nails have excellent corrosion resistance and strong toughness, can withstand greater pressure and tensile force, and are not easy to break. They can better resist the influence of various adverse environments during the installation process and ensure the safety of the equipment.

In contrast, ordinary nails are more fragile than cement nails. When impacted by climate change, they easily break or fall off. So we use them more in the decoration of daily life. In addition, ordinary nails are not as cement nails can be used for more powerful installation.

Because there are many types of cement nails, such as one that is black or blue, there are many specifications and sizes, some are 2 × 20mm, 2 × 25mm, 2 × 30mm, and some are 2.5 × 25mm., 2.5 × 30mm. There are also slightly larger ones, 3 × 30mm and 3 × 40mm. If the color cement nail is selected, its diameter including length has changed, for example, some are 3 × 25mm, 3 × 30mm, 3.2 × 40mm, 3.6 × 50mm, 4 × 60mm, 4.2 × 100mm, etc.

There are also countersunk cement nails with a diameter of about 2.5mm, 3mm, 3.2mm, 3.6mm, 4mm and 4.2mm, and a length of 25mm, 30mm and 40mm. Longer ones can reach 50mm, 75mm and 100mm. There is a kind of cement nail belonging to K-shaped or T-shaped, with a diameter of about 3mm and 3.8mm and a length of 25mm, 40mm, 50mm, 65mm, etc.

Screw is a common fastener, commonly used in machinery, electrical appliances and buildings, the material is divided into metal or plastic two, the market a wide range of screws, including dry wall nails and self-tapping nails make people confused. So what is the difference between dry wall nails and self-tapping nails? What are the types of screws? With these two questions, let's take a look!

First of all, drywall nails are mainly used in board articles, such as gypsum board, partitions, etc. However, self-tapping nails are used in softer metals without prefabricated holes. Secondly, the head shape of the drywall nail is horn-shaped, while the head of the self-tapping nail is sharp and has strong screwing force. Finally, the drywall nail is divided into single and double fine teeth. The self-tapping nails are divided into round head, top stigma, large flat head and other shapes.

Ordinary slotted screws are mainly used for the connection of small parts, and the shape is divided into pan head, cylindrical head screws and semi-countersunk heads. The screw head and the cylinder head of the screw strength is the highest, for high strength parts. The semi-countersunk head screw can be used for instruments and machinery because the top is curved, and the top is smooth and beautiful after installation,. Countersunk head screws are used in areas that are not easily exposed.