304 stainless steel CM large flat head hexagonal socket screw, flat head, ultra-thin head, machine screw, wholesale, M4M5/M6M8

The core advantages of 304 stainless steel flat-head hexagon socket screws are "material protection against loosening, corrosion and rust resistance, high torque drive, and aesthetic appearance with exposed head"

• The design features a large flat head with a wide contact area, providing both excellent protection and anti-loosening performance. The head diameter is 40%-60% larger than that of ordinary cylindrical head screws, ensuring a large contact area with the workpiece. This allows for even distribution of tightening pressure, preventing screws from embedding into soft/thin-walled substrates such as wood, plastic, and thin metal, thus preventing substrate cracking, deformation, or indentation. The wide contact surface significantly increases friction, coupled with high-torque fastening via the hexagonal socket, making it less prone to loosening under outdoor strong winds, equipment vibration, and other working conditions. Its anti-loosening effect far exceeds that of small-head screws, making it particularly suitable for exposed fastening scenarios
• Made of 304 stainless steel, this material is corrosion-resistant and rust-proof in all scenarios, featuring an alloy ratio of 18% chromium and 8% nickel. A dense oxide film forms on its surface, protecting it from moisture, salt spray (excluding high concentrations in coastal areas), and mild acid and alkali environments. It remains rust-free and corrosion-resistant even after long-term use in kitchens, bathrooms, balconies, outdoor rain shelters, and other settings. There is no risk of plating peeling off, thus avoiding contamination of workpieces caused by the peeling of plating on carbon steel screws. The material is non-magnetic, environmentally friendly, and non-toxic, making it suitable for use in scenarios requiring safety, such as children's products and food machinery components. Its service life is 4-6 times that of carbon steel galvanized products.
• Hexagonal drive, high torque transmission + anti-slip design. The hexagonal slot design fits the wrench tightly, enabling efficient transmission of high torque. Compared to Phillips and slotted screws, it is less prone to slipping during disassembly and assembly (due to wear and slippage of the slot), making it particularly suitable for precision assembly scenarios that require precise control of tightening force (such as fixing decorative panels and equipment casings). In narrow spaces, it is easy to apply force with an extended hexagonal wrench, providing strong operational flexibility and meeting the assembly needs of internal or dense fasteners in equipment.

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