SS304 GB846 M3.9 CSK Head Self-tapping Screws

 Made from 304 stainless steel, it boasts rust and corrosion resistance, maintaining stable performance in humid or corrosive environments.Its self-tapping design allows it to penetrate materials directly without pre-drilling, simplifying the installation process. The countersunk head ensures a flush finish, ideal for applications where the screw head needs to be hidden. The screw's strong bearing capacity makes it suitable for penetrating thicker materials and withstanding significant tensile and shear forces.

SS304 GB846 M3.9 CSK Head Self-tapping Screws are designed to meet various fastening needs and are your reliable choice in a variety of application scenarios.
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This screw is made of high-quality 304 stainless steel. 304 stainless steel contains 18-20% chromium and 8-12% nickel. The chromium element can form a dense oxide film, which effectively resists corrosion from the atmosphere, fresh water and weak acid media, and can withstand nitric acid with a concentration of ≤65% at room temperature; the nickel element gives it a stable austenite structure, ensuring stable performance in the temperature range of -196℃ to 800℃. At the same time, 304 stainless steel has good processing ductility, with an elongation of ≥40%, which is convenient for various complex processing operations. ​

Made in accordance with GB846 standards, its M3.9 specifications are accurate. The countersunk head design allows the screw to be flush with the installation surface after installation, which not only ensures beauty, but also avoids obstructions or safety hazards caused by protrusions. The self-tapping feature allows it to drill holes and tighten on a suitable substrate without pre-tapping, greatly improving installation efficiency. The cross slot design complies with the GB/T944.1 standard, has a high degree of compatibility with common cross screwdrivers, and is easy to operate. ​

It is suitable for connecting a variety of materials, such as sheet metal, wood, plastic, etc. It is widely used in the assembly of electronic communication equipment, furniture manufacturing, decoration hardware and other fields. During installation, it is recommended to use a suitable tool to drill a guide hole slightly smaller than the diameter of the screw, and then use a cross screwdriver to screw the screw in until it is tightened. Its good corrosion resistance allows it to be used stably for a long time even in a humid environment, providing a long-lasting and reliable fastening solution for your project.