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Countersunk internal plum blossom self tapping screw GB2670.2
- Product description：The self tapping locking screw is composed of three parts: head, rod and end. Each tapping screw has four main elements: head shape, pulling and screwing mode, thread type and end type. Head shape
Countersunk internal plum blossom self tapping screw GB2670.2
Material: stainless steel 304316, grade 8.8 high strength and grade 12.9 high strength
Product standard:GB2670.2
It can also support non-standard customization.
The "torx drive slot" is the core advantage that distinguishes this screw from ordinary Phillips and slotted screws. The torx slot has a star-shaped multi-tooth structure. When used with a dedicated torx wrench, it can form multi-point force fitting, significantly reducing the probability of tooth slipping during driving. Compared with Phillips screws, which are prone to slot wear due to uneven force, the torx design has higher torque transmission efficiency and can withstand greater tightening force. It is especially suitable for precision fastening scenarios in electronic equipment, such as the fixation of laptop casings and internal components of smart watches. In such scenarios, the screws are small in size and have extremely high requirements for fastening precision. The torx drive ensures that the screws are accurately in place, avoiding damage to the equipment casing or internal components due to tooth slipping.
The "pointed-tip self-tapping" design completely simplifies the installation process. The screw tip adopts a sharp conical or spiral pointed structure, eliminating the need to pre-drill holes in the connected parts. By simply applying rotational force with a tool, the tip can automatically cut a threaded hole, realizing the integration of "drilling - tapping - fastening" in one step. This feature not only saves installation time but also lowers the technical requirements for operators, and has significant advantages in fastening soft materials such as wood, plastic, and thin metal. For example, during the installation of custom cabinets, workers can directly use this screw to connect the side panels and horizontal panels of the cabinet without carrying drilling tools, greatly improving on-site assembly efficiency. In the production of plastic toys, the pointed-tip self-tapping design can avoid plastic cracking caused by pre-drilling, ensuring product quality.
In practical application fields, the adaptability and practicality of the countersunk torx pointed-tip self-tapping screw have been fully verified. In the electronic and electrical industry, it is the "invisible fastener" for smart device casings. For instance, the connection between the metal middle frame and plastic back panel of a tablet computer needs to meet the requirements of "thinness", "no protrusion", and "anti-disassembly" (the torx drive requires a dedicated tool). This screw can not only fit the device surface through its countersunk design but also prevent unauthorized disassembly by non-professionals with the torx drive, ensuring the safety of internal components of the device. In the construction and decoration field, it is often used in the ceiling installation of gypsum boards and calcium silicate boards. The pointed-tip self-tapping capability can easily penetrate the boards and connect with keels. The countersunk design avoids the protrusion of the screw head affecting the flatness of the ceiling, and the torx drive can reduce the problem of tooth slipping during ceiling installation, lowering the rework rate.
In the production of home and daily necessities, this screw is even a "tool for efficient assembly". Modern panel furniture mostly adopts a combination of "three-in-one connectors + countersunk self-tapping screws". Among them, the countersunk torx pointed-tip self-tapping screw is responsible for fixing the side panels and back panels. Its self-tapping feature is suitable for boards of different thicknesses, and the countersunk design ensures the smooth and non-protruding surface of the furniture. In the production of children's furniture, the non-protruding advantage of this screw can prevent children from being scratched while playing, and the high stability of the torx drive also reduces the risk of screw loosening, improving the safety of furniture use. In addition, in the assembly of automotive interiors, such as the fixation of instrument panels and door trim panels, this screw also plays an important role. The pointed-tip self-tapping can adapt to the thin structure of interior plastic parts, and the countersunk design maintains the overall texture of the interior surface.
When using the countersunk torx pointed-tip self-tapping screw, attention should be paid to selecting the appropriate specification according to the material and thickness of the connected part. For soft materials such as wood and plastic, models with larger thread pitches can be selected to ensure smooth self-tapping; for thin metal plates, styles with smaller thread pitches and sharper tips should be chosen to avoid plate deformation. During installation, the tightening force should be controlled—excessive force may cause cracking of the connected part or tooth slipping of the screw. At the same time, a torx wrench of matching specification should be used to avoid damage to the drive slot due to mismatched tool models. When purchasing, priority should be given to products made of high-strength carbon steel or stainless steel. After heat treatment, these materials have higher tensile strength and corrosion resistance, and can adapt to complex service environments such as humidity and high temperature.
With the increasing demand for "precision assembly" and "efficient production" in the manufacturing industry, the application scenarios of the countersunk torx pointed-tip self-tapping screw will continue to expand. It is not only a basic fastener but also a solution that balances safety, aesthetics, and convenience. In fields such as electronics, home furnishings, and construction, it provides important support for improving product quality and optimizing production efficiency. Whether for professional manufacturing enterprises or DIY enthusiasts, mastering the selection and use skills of this screw can reduce troubles and improve results during the assembly process, making fastening work more precise and reliable.
