Clarification on Anchor Type and DIN Standard

This product is a sleeve anchor, a type of expansion anchor known for its versatility and strong holding power in a variety of solid materials.

The defining feature of this specific model is its screw, which conforms to the DIN 7991 standard. This specifies a Hexagon Socket Countersunk Flat Head Screw. This means the screw is driven by a hex key (Allen key), allowing for higher installation torque compared to a standard Phillips or slotted drive, resulting in a more secure fastening. The countersunk head ensures that the screw sits perfectly flush with the surface of the item being fastened.

Product Mechanism and Installation

The anchor works by expanding its sleeve to create a friction-hold against the walls of the drilled hole in the base material.

• Mechanism: The anchor assembly consists of a DIN 7991 hex socket countersunk screw, a split expansion sleeve, and a conical expander nut at the base. When the screw is tightened, it pulls the conical nut up into the sleeve. This action forces the sections of the sleeve to expand outwards, pressing firmly against the surrounding concrete or masonry and creating a secure, load-bearing anchor point.
• Installation Process:
  1. Select the correct anchor size for your application. Drill a hole into the base material that matches the diameter of the anchor sleeve. Ensure the hole is drilled to the required depth.
  2. Thoroughly clean the hole of all dust and debris using a brush and blower to ensure maximum holding power.
  3. For a perfect flush finish, use a countersink bit to create a slight bevel in the surface of the fixture being mounted, matching the angle of the anchor’s head.
  4. Place your fixture in position, align its hole with the hole in the base material, and insert the entire anchor assembly through the fixture and into the hole until the head is flush.
  5. Use a suitable hex key (Allen key) to turn the screw clockwise. Continue tightening until you feel firm resistance, which indicates the anchor is fully expanded and secure.

Product Parameters

Key Features

• Flush-Mount Finish: The DIN 7991 countersunk head allows the anchor to sit perfectly flush with the fixture’s surface, providing a clean, aesthetic, and non-protruding finish.
• High-Torque Installation: The hexagon socket (hex key) drive allows for the application of higher torque than traditional screw heads, ensuring a very secure and tight fastening.
• Reliable Holding Power: The expansion sleeve mechanism provides a strong and dependable anchor point in solid materials like concrete, brick, and block.
• Through-Fixing Design: Simplifies installation by allowing the anchor to be installed directly through the item being fastened.
• Corrosion Resistance: The white zinc plating provides a protective layer against rust and corrosion, making it suitable for a wide range of indoor environments.

Common Applications

This anchor is the ideal choice for heavy-duty fastening where a flush surface is critical for aesthetic or functional reasons.

• Attaching steel plates, brackets, and facade elements to concrete walls.
• Securing machinery bases and industrial equipment to factory floors.
• Installing door and window frames.
• Fastening architectural elements, signage, and handrails where a smooth surface is required.
• General construction and infrastructure projects requiring a strong, flush-mounted anchor.