Elevate your high-security fastening projects with our 12.9 Grade Hexagonal Three Combination Head Perforated Screws—engineered for anti-tampering, high-torque performance across industrial, machinery, and structural applications. Available in M2-M12 sizes, these cup head screws feature a perforated design for sealed installation, delivering uncompromising strength and reliability for critical assemblies.
Core Features & Benefits
12.9 Grade High-Strength Alloy Steel
Forged from premium alloy steel and heat-treated to 12.9 grade, the screws boast exceptional tensile and shear resistance. They withstand extreme torque, heavy loads, and continuous vibration, outperforming standard carbon steel fasteners for long-lasting durability in industrial scenarios.
Hexagonal Three Combination Head Design
The integrated three combination head (hex drive + built-in washer + cup head) ensures stable installation, preventing tool slippage and distributing pressure evenly. The hex drive enables efficient torque application, while the cup head offers a sleek, low-profile finish for neat assemblies.
Perforated Structure for Sealed Security
Equipped with a head perforation, these screws support post-installation sealing (e.g., lead sealing, pinning) to create a tamper-proof barrier. Ideal for applications requiring anti-unauthorized-disassembly, such as public infrastructure, machinery, and high-security equipment.
M2-M12 Size Range for Versatility
Covering M2 to M12 common specifications, the screws cater to diverse fastening needs—from small precision components to heavy-duty structural connections. They fit standard tapped holes and hex tools, ensuring quick, hassle-free installation for professionals.
Industrial-Grade Reliability
Each screw undergoes strict dimensional and performance testing, meeting industrial standards for precision and interchangeability. Suitable for machinery assembly, construction hardware, pipeline systems, and high-security installations, ensuring consistent performance in harsh working conditions.
Specifications
Strength Grade: 12.9 Grade Alloy Steel
Design: Hexagonal Three Combination Head, Cup Head, Perforated (Sealable)
Size Range: M2 - M12
Drive Type: Hex Socket
Applications: Industrial machinery, high-security installations, construction, pipeline systems
