PWA black round head gasket self tapping cross screw pan head self tapping ribbon meson screw M3/M4/M5

The core advantages of the round headed self tapping screw with a medium are "anti pressure injury, strong fixation, and safe adaptation". Combined with the non angular design of the round head, the stabilizing and anti loosening characteristics of the gasket (medium), and the convenience of self tapping without holes, it is suitable for scenarios that require substrate protection and fastening stability.

1. Equipped with a built-in gasket, double protection and more stable fastening: a circular gasket (also known as a flat gasket) is formed under the head, which expands the contact area by 2-3 times compared to ordinary round head screws. It can disperse the fastening pressure, prevent screws from being embedded in soft substrates such as wood and plastic (to prevent substrate cracking and indentation), and enhance friction with the workpiece. The anti loosening effect is better, and it is less likely to loosen under slight vibrations.
2. Round head structure, safe and scratch free: The head is a semi-circular spherical surface with smooth edges and no sharp corners. When paired with a gasket, the surface is smoother and will not scratch clothing, skin or adjacent parts during daily contact. Its safety is higher than that of countersunk and flat head screws with corners.
3. Self tapping thread, efficient installation without drilling: Equipped with sharp cutting threads, it does not require pre drilling and tapping, and can directly drill into substrates such as wood, plastic, thin metal (≤ 1.2mm), and panel furniture. It can be operated manually or with electric tools, greatly saving assembly time and suitable for mass production or DIY 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