12.9 Grade Blue-White Zinc DIN912 Screw M4-M10 Hex Knurled Cylindrical Cup Head Fastener

Elevate your industrial assembly and machinery projects with our 12.9 Grade Blue-White Zinc DIN912 Cylindrical Head Hex Knurled Cup Head Screws (M4-M10)—engineered for extreme strength, corrosion resistance, and precision fastening. Compliant with international DIN912 standards, these screws deliver reliable performance for heavy-duty equipment, tooling fixtures, and mechanical builds, making them a top choice for professional engineers and industrial buyers.

Core Features & Benefits

12.9 Grade Ultra-High Strength Alloy Steel

Forged from premium alloy steel and heat-treated to achieve 12.9 grade tensile strength, these screws withstand extreme torque and heavy loads without deformation or breakage. They exceed standard industrial fastening requirements, ensuring stable connections for high-stress applications like machinery frames, mold bases, and equipment assemblies.
Blue-White Zinc Plating for Superior Corrosion Resistance

Coated with a durable blue-white zinc finish, the screws offer excellent protection against rust, oxidation, and humidity. This plating extends service life in workshop, indoor, and mild outdoor environments, while maintaining a clean, professional appearance that resists scratches during installation and use.
DIN912 Standard & Knurled Cup Head Design

Strictly manufactured to DIN912 specifications, guaranteeing consistent dimensional accuracy and interchangeability with global industrial components. The cylindrical cup head features a precision hex drive for stable tool engagement, plus a knurled side design that enhances torque transmission and prevents slippage during tightening.
M4-M10 Versatile Size Range for Broad Applications

Covering M4 to M10 specifications, these screws cater to diverse industrial needs—from small precision fixtures to heavy-duty machinery parts. Compatible with standard hex keys, they streamline installation workflows for both small-batch production and large-scale assembly projects.
Ideal for Heavy-Duty Industrial Scenarios

Perfect for machinery manufacturing, tooling fixture assembly, mold base fastening, and equipment maintenance. The combination of 12.9-grade strength, blue-white zinc corrosion resistance, and DIN912 compliance makes these screws a reliable solution for professional industrial and mechanical applications.

Specifications

Strength Grade: 12.9 Grade Alloy Steel
Surface Treatment: Blue-White Zinc Plating
Standard: DIN912
Head Design: Cylindrical Hex Knurled Cup Head
Size Range: M4-M10
Applications: Machinery Assembly, Tooling Fixtures, Mold Bases, Industrial Equipment