Flanged Ground Screw with Serrated Spiral FK 76×850×3.0 mm

The FK 76×850×3.0 mm ground screw is a concrete-free foundation for sites where ordinary screws struggle – gravel, small stones, roots, soft rock and compacted fill. The serrated edge of the spiral cuts through the soil instead of pushing it aside, so the screw goes in with less torque and rarely needs pre-drilling. At the top it ends in a Ø160 × 6 mm flange with a central 1 × M16 connection and mounting slots, ready for beams, posts or steel profiles.

Key benefits

• Serrated spiral – up to ~20% easier installation in difficult soils
• Suitable for gravel, stones, roots and ground after tree removal
• Ø160 × 6 mm flange with central 1 × M16 connection and adjustment slots
• Hot-dip galvanised to EN ISO 1461 – long-lasting corrosion protection
• No digging, no concrete – can be loaded right after installation
• Does not disturb soil or roots; removable and reusable

Technical specifications

Download the technical data sheet with drawing and dimensions: 📄 Technical data sheet (PDF)

Applications

• Fences, gate posts and enclosures
• Gazebos, pergolas and carports
• Greenhouses
• Timber decks and platforms
• Garden sheds, signs and solar mounts

Installation

Installed with a hand wrench, a gearbox and powerful drill, or an electric machine. Levelling is done on the flange, and the slots allow fine adjustment of the structure's position.

Why a ground screw instead of concrete?

A ground screw is a ready foundation in minutes: no excavation, no formwork, no concrete and no curing time. It leaves no construction waste, works even with a high water table, and can be unscrewed and relocated if needed – saving time, labour and often a significant part of the foundation cost.

Ordering and advice

In stock. Not sure which model suits your soil and load? Contact us – we will help you choose the right ground screw and quantity.