Upgrade your industrial fastening solutions with our 10.9 Grade Blue-White Zinc DIN7991/GB70.3 Countersunk Head Allen Machine Screws (M3-M16)—a dual-standard engineered fastener that balances high tensile strength, corrosion resistance, and flush-mount precision. Ideal for machinery assembly, electronic enclosures, and precision tooling, these screws meet both international DIN7991 and Chinese GB70.3 standards, catering to global industrial procurement needs.
Core Features & Benefits
10.9 Grade High-Strength Alloy Steel
Forged from premium alloy steel and heat-treated to 10.9 grade specifications, these screws deliver exceptional tensile and shear strength, capable of withstanding heavy loads and high torque in demanding industrial applications. They resist deformation and breakage, ensuring stable connections for machinery frames, fixture bases, and structural components.
Blue-White Zinc Plating for Enhanced Corrosion Protection
The durable blue-white zinc coating forms a protective barrier against rust, oxidation, and humidity, extending the screw’s service life in workshop, indoor, and mild outdoor environments. The smooth, uniform finish resists scratches during installation and maintains a clean, professional appearance, suitable for visible fastening applications.
Dual-Standard Compliance (DIN7991 & GB70.3)
Manufactured to meet both DIN7991 (international) and GB70.3 (Chinese national) standards, these screws ensure universal interchangeability with compatible components across global markets. The strict dimensional accuracy guarantees seamless fit, eliminating compatibility issues for cross-border manufacturing and maintenance projects.
Countersunk Head Allen Drive Design
The flat countersunk head creates a flush, low-profile finish when installed, eliminating protrusions that could interfere with moving parts or surface aesthetics. The Allen (hex socket) drive enables stable tool engagement, preventing slippage during tightening and ensuring precise torque application for consistent fastening results.
Versatile M3-M16 Size Range
Covering a wide size spectrum from M3 to M16, these machine screws cater to diverse industrial needs—from small electronic device assembly to heavy-duty machinery installation. Compatible with standard Allen keys, they streamline workflow efficiency for both professional engineers and DIY enthusiasts.
Broad Industrial Applications
Perfect for machinery manufacturing, precision tooling assembly, electronic enclosure fastening, automotive component installation, and furniture hardware mounting. The combination of high strength, corrosion resistance, and dual-standard compliance makes these screws a reliable choice for global industrial buyers.
Specifications
Strength Grade: 10.9 Grade Alloy Steel
Surface Treatment: Blue-White Zinc Plating
Standards: DIN7991, GB70.3
Head Design: Countersunk Flat Head, Allen Hex Socket Drive
