YFS 12.9 M3 Button Head Screw Package

About YFS YFS products not only meet international standards, but also exceed the quality of typical 12.9-grade screws. It is one of the top brands in the world for hex socket screws. YFS high-strength hex socket screws are sold worldwide, utilizing the screw-specializing technology from Taiwan to create high-quality hex socket screws that meet users' needs. The production of high-quality 12.9-grade screws by YFS Screw relies on three factors: raw materials, heat treatment, and laboratory. YFS screw mainly imports chromium-molybdenum alloy steel SCM435H from NIPPON STEEL and SUMTOMO METALS to ensure leading raw materials. YFS screw invested heavily in purchasing a TXG surface blackening heat treatment furnace from TOYO-RO in Japan, which is fully computer-controlled to ensure the stability of heat treatment and consistency of screw surfaces. YFS screw has a complete materials mechanical performance laboratory, which has been certified by CNLA and A2LA. They conduct random insp