Screws are used to connect two objects. Generally, the head of the screw will protrude above the surface of the connected object, making the surface uneven. Countersunk screws can sink below the surface to make the surface flat. Hard objects need to drill countersunk holes at the corresponding position of the countersunk head. In short, the countersunk head means that the head of the screw can keep the surface flat after installation. And wood screws are used to screw into wood for connection or fastening.

Cross recessed pan head wood screws are widely used in the following fields because of their unique structure: ● Furniture manufacturing: used to connect various parts of furniture to ensure its stability and strength. ● Automobile manufacturing: used for the tight connection inside the automobile to improve the safety and reliability of the automobile. ● Woodworking: used for the assembly and fixing of wood products to improve the durability of wood products. ● Mechanical manufacturing: used for the assembly and fixing of various mechanical equipment to ensure the normal operation of the equipment.

1.DIN7504K refers to a self-drilling screw with a hexagonal head, a flanged head, and a pointed end.The tail of a self-drilling screw is different from that of an ordinary screw. It is not a pointed tail, but is like a drill bit. This tail allows the screw to drill holes by itself without the need for pre-made holes when screwing into steel plates, wood, etc. 2. Advantages: The biggest advantage is that it does not require auxiliary processing, and can be directly drilled and tapped on the material, which greatly saves construction time. In addition, DIN7504K has higher toughness and maintenance, and will not easily loosen after long-term use, thereby enhancing the stability of the structure. 3. Wide application: Hex self-drilling screws are widely used in the construction industry, especially in the fixing of color steel tiles on steel structures. Because of their easy and firm installation, they can effectively improve construction efficiency and quality. In addition, hexa self-drilling screws are also commonly used to fix thin plates in simple buildings, showing their practicality in a variety of construction environments.

1. DIN7991 adopts countersunk head design, countersunk head screw design so that it can be flush on the surface, will not protrude, increase the aesthetic. At the same time, the hex provides better torque transfer, reducing the possibility of sliding and damage. When the high strength grade (usually 10.9 grade) made of alloy steel is used, it has good tensile and shear resistance. DIN7991 screws make screws easier to install and tighten, and are suitable for applications where frequent disassembly is required 2. Hexagon flat head screw DIN7991 is widely used in many fields, such as automobiles and automobile new energy field, military aerospace field, shipbuilding heavy industry field, medical equipment field, food machinery field, electronic communication equipment field and wind power field.

1.DIN912 hex socket screw, also known as hex socket cylindrical head screw, is a common fastener, widely used in various mechanical equipment and electronic products. The DIN912 hex screw features a cylindrical head with a hexagonal hole at the top that requires the use of an hex wrench to tighten or loosen. This design allows the screw to provide greater torque during installation, while also preventing the screw from loosening during use. 2. Widely used ‌ : common in mechanical equipment, automobile manufacturing and other fields, used to connect parts and provide a stable fixed effect

1. Convenient manual operation: The head design of the butterfly screw increases the lateral force surface, making manual tightening more efficient and labor-saving 2. Insulation and non-magnetic properties of butterfly screws: Butterfly screws have the characteristics of insulation and non-magnetic properties, which make them particularly useful in situations where electromagnetic interference needs to be avoided, such as in medical equipment, electronic devices, and communication devices 3. Wide application: Butterfly screws play an important role in multiple industries due to their unique design and excellent performance. Whether in situations that require manual operation or special environments that require insulation, non-magnetic, and corrosion resistance, butterfly screws can provide reliable solutions.