- Standard Number: GB/T 3098
- Material: Carbon steel
- Drive tool: Internal hex
I. Advantages of Coatings
Functional Coatings: These coatings possess specific functionalities such as waterproofing, dustproofing, thermal insulation, or conductivity. Functional coatings provide additional properties, enabling objects to exhibit special characteristics in particular environments.
Anti-corrosion Coatings: These coatings prevent corrosion of metallic materials. For instance, anti-corrosion coatings on ships protect hulls from seawater erosion, thereby extending service life.
Coatings find extensive application. Within industry, they commonly protect metal products, reduce friction, and enhance wear resistance. Tool blades, for instance, are often coated to increase cutting efficiency and prolong service life. In construction, coatings serve for external wall insulation, waterproofing, and decorative purposes. The automotive sector employs coatings for body rust prevention, aesthetic enhancement, and aerodynamic drag reduction. In aerospace, coatings enhance aircraft surface corrosion resistance, reduce drag, and minimise radar reflectivity.
The advantages of coatings lie in their multifunctionality and broad applicability.
II. Advantages of Internal Hexagon Sockets
Internal hexagon socket combination screws represent one of the most widely used and technically demanding fasteners. Their key advantages include substantial clamping force, ease of operation using an internal hex wrench, straightforward installation, suitability for virtually all structural applications, and an aesthetically pleasing, uniform appearance.
Applications of Internal Hexagon Socket Head Screws:
Internal hexagon socket head machine screws find extensive use across high-speed rail, automotive, mechanical engineering, mould manufacturing, electronics, and construction sectors.

