Cross Recessed Raised Countersunk Head Self-tapping Screw

Structural Features of the Cross Recessed Raised Countersunk Head Self-tapping Screw

Cross Recessed Slot: It adopts a cross-shaped slot type and is used in conjunction with a cross screwdriver. This slot type facilitates the accurate insertion and positioning of the screwdriver. When tightening or loosening the screw, it can transmit torque well. Compared with the slotted type, its anti-slip performance is improved, which can effectively reduce the situation where the screwdriver slips out of the slot during the operation, improving the efficiency and convenience of installation and disassembly.

Raised Countersunk Head: The head is in the shape of a raised countersunk head, which combines some characteristics of both the countersunk head and the round head. After the screw is screwed into the connected component, the head will not completely sink into the surface of the connected component but is slightly higher than the surface, forming a spherical-like protrusion. This design can not only make the connection surface relatively flat and have a certain aesthetic appeal but also, to a certain extent, avoid the problem of insufficient operating space for the screwdriver caused by a completely countersunk head, facilitating the re-disassembly or adjustment of the screw when necessary.

Self-tapping Thread: Similar to the hexalobular socket countersunk head self-tapping screw, its thread has a special design. When screwed into the connected component, it can cut the corresponding internal thread on the material by itself without the need to pre-process the internal thread on the connected component. This can simplify the installation process, improve work efficiency, and ensure a good connection strength, especially suitable for the connection of some thinner materials such as metal sheets and plastics.

Materials and Surface Treatments of the Cross Recessed Raised Countersunk Head Self-tapping Screw

Materials: Commonly, materials such as carbon steel and stainless steel are used. The cross recessed raised countersunk head self-tapping screw made of carbon steel has relatively high strength, can meet the connection requirements in general industrial and civil fields, and has a relatively low cost. The stainless steel material has excellent corrosion resistance and oxidation resistance and is suitable for corrosive environments such as humidity, acid, and alkali, such as outdoor equipment, chemical equipment, food processing equipment, and some places with high hygiene requirements.

Surface Treatments: Common surface treatments include galvanizing, nickel plating, and blackening treatment, etc. Galvanizing treatment can improve the corrosion resistance of the screw, prevent rusting, and at the same time have a certain decorative effect, making its surface more beautiful. It is widely used in general indoor and outdoor environments. Nickel plating treatment can not only enhance the corrosion resistance but also improve the surface hardness and wear resistance, making the surface of the screw present a bright appearance. It is often used for products with high requirements for appearance and corrosion resistance, such as electronic devices and high-end furniture. Blackening treatment can form a black oxide film on the surface of the screw. In addition to having a certain anti-rust ability, it can also increase the aesthetic appeal of the product. It is often used for some mechanical parts and decorative components with special requirements for appearance.

Specifications and Dimensions of the Cross Recessed Raised Countersunk Head Self-tapping Screw

Thread Specifications: There are various common specifications, such as M2, M2.5, M3, M4, M5, etc. Smaller thread specifications are suitable for connecting thinner materials or occasions with low requirements for connection strength, such as plastics and thin metal sheets; larger thread specifications are used for thicker materials or connection parts that need to bear a large tensile force. The appropriate thread specification can be selected according to specific application scenarios and connection requirements.

Length Dimensions: Generally, it ranges from a few millimeters to dozens of millimeters. Shorter screws are suitable for connecting single-layer or thinner components, while longer screws can be used for connecting multiple layers of materials or penetrating thicker materials. In actual use, the appropriate length needs to be determined according to the thickness of the connected component and the connection requirements.

Application Fields of the Cross Recessed Raised Countersunk Head Self-tapping Screw

Architectural Decoration: It is often used in architectural decoration projects, such as the installation of doors and windows, decorative moldings, lightweight panels, etc. The design of the raised countersunk head can make the connection surface relatively flat, which is beneficial for subsequent surface treatment and decoration work. The self-tapping function facilitates quick installation on building materials of different materials.

Furniture Manufacturing: Whether it is wooden furniture or panel furniture, the cross recessed raised countersunk head self-tapping screw can be used to connect various parts of the furniture, such as the assembly of drawers and the fixing of the back panel. Its raised countersunk head feature can make the surface of the furniture more beautiful, and at the same time, the connection method of the self-tapping screw can ensure the structural stability of the furniture.

Electronic Equipment: In the production of electronic equipment, such as the assembly of computer cases, printer casings, displays, etc., this kind of screw is often used. The cross recessed slot facilitates the quick positioning and tightening of the screwdriver on the automated assembly line. The raised countersunk head design not only ensures the flatness of the equipment casing but also will not affect the internal space or increase the assembly difficulty due to an overly deep countersunk head.

Automobile Manufacturing: It is applied in the installation of automobile interior parts and the connection of body components. For example, in the fixing of automobile seats and the installation of instrument panels, the cross recessed raised countersunk head self-tapping screw can provide a reliable connection, and its appearance design can also meet the aesthetic requirements of the automobile interior.

Installation Precautions for the Cross Recessed Raised Countersunk Head Self-tapping Screw

Select Appropriate Tools: Use a cross screwdriver or an electric or pneumatic screwdriver that matches the specifications of the cross recessed slot. Ensure that the size and shape of the screwdriver head precisely match the cross recessed slot to effectively transmit torque and avoid damaging the cross recessed slot on the screw head.

Control the Installation Torque: Reasonably control the installation torque according to the specifications of the screw and the material of the connected component. Excessive torque may cause the screw to break or the connected component to be damaged, while insufficient torque will make the connection insecure. For some occasions with high requirements for connection strength, a torque wrench can be used to precisely control the torque.

Keep Vertical Installation: During installation, the screw should be kept perpendicular to the surface of the connected component. This can ensure that the screw is smoothly screwed in and that the self-tapping thread evenly cuts into the connected component, ensuring the strength and stability of the connection. If the installation angle is inclined, problems such as thread deformation and connection loosening may occur.

Clean the Installation Surface: Before installing the screw, it is necessary to clean the oil stains, dust, debris, etc. on the surface of the connected component to ensure good contact between the screw and the connected component and improve the reliability of the connection. At the same time, prevent impurities from entering the thread gap, which may affect the formation of the self-tapping thread and the tightness of the connection.