DIN7991/GB70.3 M2-M20 Countersunk Screw 10.9 Grade Hex Socket Flat Cup Head Fastener

Regular price $7.98 USD

Regular price ~~$7.98 USD~~ Sale price $7.98 USD

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10.9 Grade DIN7991/GB70.3 screws are heavy-duty industrial fasteners engineered with a hex socket drive and countersunk flat cup head. Covering sizes M2 to M20 (including M2.5, M3, M4, M5), these high-strength screws deliver exceptional tensile strength and anti-vibration performance, ideal for demanding applications like mechanical assemblies, automotive components, construction fixtures, and precision machinery.

Crafted to 10.9 strength standards, they boast reliable load-bearing capacity, resisting loosening under heavy loads and harsh industrial conditions. The hex socket drive enables precise torque control and easy installation in tight spaces, compatible with standard industrial tools for efficient assembly. The countersunk flat cup head design ensures a flush fit with workpieces, eliminating protrusions for a clean, professional finish while enhancing load distribution to protect surfaces.

Compliant with both DIN7991 and GB70.3 standards, these screws guarantee consistent dimensional accuracy and universal compatibility, meeting global industrial requirements. Perfect for scenarios where durability, precision, and aesthetics converge—from machinery panels to structural fixtures.

Core Features & Advantages

10.9 High-Strength Grade: Superior tensile strength and durability for heavy-duty industrial use.
Dual Standard Compliance: DIN7991 & GB70.3 compatibility, 适配 global procurement needs.
Hex Socket Countersunk Head: Precise installation, flush fit, and no protruding parts.
Flat Cup Design: Optimizes load distribution, protecting workpieces and ensuring stable fastening.
M2-M20 Full Size Range: Covers small to large fastening demands for diverse industrial scenarios.

Key Specifications

Grade: 10.9 High-Strength
Standards: DIN7991, GB70.3
Drive Type: Hex Socket
Design: Countersunk Flat Cup Head, Flush-Fit
Sizes: M2 - M20 (M2, M2.5, M3, M4, M5, M6, M8, M10, M12, M16, M20)
Applications: Mechanical Assemblies, Automotive Parts, Construction Fixtures, Machinery Panels, Precision Equipment
Performance: High Load-Bearing, Anti-Vibration, Precision-Fit, Corrosion-Resistant (with proper surface treatment)