Black large flat-head self-tapping screws CA ultra-thin cross flat-head self-tapping screws large flat-head self-tapping screws M2/M3/M4

The core advantages of black flat-head self-tapping screws are "fit and stability, concealment and aesthetics, safety and scratch resistance, high efficiency in self-tapping, and basic corrosion resistance."

1. The large flat head design ensures a secure fit and protection. The head of the base material is a large-diameter flat structure, with a contact area 2-3 times larger than that of ordinary round head or countersunk screws. After tightening, it fits tightly with the surface of the workpiece, maximizing the distribution of fastening pressure and avoiding embedding into soft/thin base materials such as wood, plastic, and thin metal (≤1.5mm) (preventing cracking, indentation, and perforation). With uniform stress distribution, it is less prone to loosening under minor vibrations (such as furniture use or small appliance operation), and its fastening stability is far superior to that of small-head screws.
2. Black surface treatment, excellent concealment + visually uniform surface. The surface undergoes oxidation blackening, electrophoresis blackening, or black nickel plating treatment, presenting a uniform matte/glossy black color, which can perfectly blend into dark-colored workpieces (such as black wooden furniture, black plastic shells, and dark-colored metal plates). When the screws are exposed, they are almost "invisible", and their visual concealment far exceeds that of silver or galvanized screws. Moreover, black is versatile and will not destroy the overall aesthetics of the assembly surface, making it suitable for exposed fastening scenarios (such as decorative plates and furniture hardware).
3. It is safe and scratch-resistant, suitable for various contact scenarios. The large flat edges have been chamfered to eliminate sharp corners, ensuring that daily contact will not scratch clothing, skin, or internal precision components of equipment (such as home appliance circuits and plastic casings). It offers high safety, making it especially suitable for children's products, furniture, frequently touched hardware accessories, and other scenarios

Shenzhen Huayuanxing Precision Hardware Co., Ltd. is a manufacturer specializing in the development, production, and sales of screw fasteners, with 20 years of industry experience. Huayuanxing screws are characterized by precision, miniaturization, and firmness. The company's existing factory covers an area of over 8,000 square meters, with a finished product warehouse of over 4,000 square meters and a stock inventory of over 3,000 tons. It has successively introduced more than 250 precision production equipment, including cold heading machines, thread rolling machines, and thread milling machines, capable of producing small screws with an outer diameter of 1mm and a length of 3mm, with an average daily production capacity of up to 20 million pieces. Huayuanxing has complete inspection equipment, including salt spray testing machines and 2D imaging detectors. It currently employs more than 50 people, including 8 engineering and technical personnel with 20 years of industry experience.