Allen Csk Din-7991

Description

HBS Fasteners manufactures premium Allen CSK Machine Screws, also known as Flat Head Socket Cap Screws, in accordance with the DIN 7991 standard. These fasteners are the preferred choice for safety-critical and aesthetic applications where a smooth, snag-free surface is required. The 90-degree countersunk head sits inside a pre-drilled conical hole, making it ideal for moving parts, sliding tracks, and architectural panels. Driven by an internal hex (Allen) key, they allow for much higher tightening torque compared to traditional slotted or Phillips head screws.

Technical Specifications

• Standard: Manufactured strictly to DIN 7991 and ISO 10642 specifications.

• Head Style: 90-degree Countersunk (Flat) head for flush mounting.

• Drive Type: Internal Hexagon Socket (Allen Drive) for maximum grip and anti-slip performance.

• Thread Type: Full or partial metric threads with high-precision pitch for machine-threaded holes or nuts.

• Size Range: Available from M3 to M24 in various lengths to suit different plate thicknesses.

Material & Quality Excellence

• Stainless Steel: Available in A2 (304) and A4 (316) for superior rust resistance in outdoor and marine environments.

• Other Materials: Produced in Grade 10.9 and 12.9 High-Tensile Alloy Steel for heavy-duty structural applications.

• In-House Control: Using raw materials from our own wire drawing facility, we ensure consistent tensile strength and precise socket dimensions to prevent “rounding” of the head during installation.

• Surface Finishing: Options include Black Oxide, Zinc Plating (Cr3+), Chrome Plating, and Nickel Plating.

Key Application Areas

• Machine Guards & Tooling: Ensuring that bolt heads do not interfere with moving machinery parts.

• Automotive & Aerospace: Used in interior panels, engine components, and gearboxes where space is limited.

• Architectural Hardware: Ideal for door hinges, glass fittings, and furniture where a clean, modern look is required.

• Electronics: Securing heat sinks and internal components in enclosures where height clearance is minimal.