







Discover the unmatched versatility and precision of our Countersunk Torx Countersunk Screws (Socket Head Screws) - the ultimate solution for industrial excellence.
1. Head design: Revel in the innovation of our Integrated Plum Blossom Sinking Head, engineered for seamless performance.
Countersunk: Meticulously designed with a cone angle of 82°, adhering to the ISO 2009 standard, these screws become flush with the material's surface, perfect for applications demanding superior flatness, such as exquisite furniture panels and sleek electronic device casings.
• Plum blossom trough (Torx) ®/ Star groove: Experience superior torque transmission with our hexagonal star groove design. Achieve over 70% increased anti-slip efficiency compared to traditional cross grooves, ideal for the rapid and reliable installation of electric tools, recommended at speeds up to 3000RPM.
2. Thread and stem characteristics
• Thread type:
Self-tapping thread (ST series): Equipped with a cutting-edge tip, it penetrates cork or thin metal plates effortlessly, such as aluminum alloys up to 3mm thick, eliminating the need for pre-drilling and enhancing efficiency.
Machine thread (M series): Designed for heavy-duty applications, these threads require pre-drilled holes and nuts, ensuring robust connections in high-load scenarios like steel frameworks.
• Rod material and coating:
Carbon steel (10B21/45 # steel): Post heat treatment, it achieves HRC38-42 hardness, ideal for supporting conventional indoor loads.
Stainless steel (304/316): Renowned for its excellent resistance to corrosion, this material is perfect for outdoor or humid environments, such as marine equipment and pool accessories.
• Surface coating:
Galvanized (blue white/color zinc): Ensures salt spray resistance for over 72 hours, aligning with general industrial rust prevention standards.
Dakro: Provides enduring protection with salt spray resistance of 500 hours or more, tailored for coastal and chemically corrosive areas.