Concrete screw BTS E 6×35 with external thread M8. Quantity in package 150 pcs. 9ZG635M8BTSE

Concrete screw with reusable mounting and removal

The BTS E 6x35 screw with external M8 thread is designed for re‑use in cracked concrete – no replacement needed after removal. This is a key advantage for installers who frequently modify or replace elements on walls and ceilings, e.g., mounting rails, electrical profiles, or HVAC pipes.

Installation is carried out in two steps: first you drill the hole, then – using the same tool – you screw in the element. No separate anchors, screws or clamping tools are required. The system works as a single unit – fast, without unnecessary steps.

Two anchoring depths – greater flexibility and safety

The screw can be set to two different depths (35 mm or 50 mm), allowing adaptation to the specific conditions of the object. The shallow depth (35 mm) reduces the risk of hitting reinforcement bars – especially in old or undocumented structures. When higher load capacity or thicker insulation is needed, you can use the full depth.

Zinc‑aluminum coating and ETA approval

The zinc‑lamell (zinc‑aluminum) coating provides high corrosion resistance – even in humid environments such as technical rooms or outdoor installations. ETA approval and CNBOP certification confirm compliance with European safety standards for non‑structural fastenings.

Construction and installation

• Hex head with M8 thread (thread length 15–16 mm) – allows direct attachment of elements without additional nuts.

• Hole diameter: 6 mm – fits standard concrete drill bits.

• Drilling depth: 40 mm – required for full anchoring performance.

• Screw cross‑section: 7.5 mm – provides adequate load capacity while maintaining a compact design.

• Socket: SW10 – compatible with most cordless and wired screwdrivers.

Applications

Ideal for:

• Mounting of electrical conduit rails, cable trays, ducts.

• Installation of air‑conditioning and ventilation systems on insulated ceilings.

• Attaching profiles to concrete slabs with a thermal insulation layer.

• Installing components where removal and reuse are required.

The screw is not intended for structural loads – but where you need a solid, repeatable, and fast fastening in cracked concrete, it is one of the most practical solutions available on the market.