Heco Topix Torx CSK Insulation Screws ZP 6mm x 220mm

The HECO-TOPIX-plus is a structural timber screw with a partially threaded shank. As the threaded section enters the supporting timber, the unthreaded shank allows the upper timber component or counter-batten to be pulled firmly towards the substrate.

Key features:

• Partially threaded design: Supports effective clamping of timber components in wood-to-wood connections.
• HECO-TOPIX point: Designed for quick starting and reduced splitting of the timber. Pre-drilling is not normally required when used within the approved installation conditions.
• PerfectPitch thread geometry: The thread pitch is matched to the screw length to support efficient driving and reliable load transfer.
• Countersunk head with milling grooves: Helps the head cut into the timber and finish flush with the surface.
• HECO-Drive HD-30 recess: Provides controlled power transmission when used with the correct HECO-Drive bit.
• GripFit compatibility: A matching HECO-Drive bit can retain the screw securely, supporting controlled one-handed positioning.
• Bright zinc-plated A3K finish: Provides corrosion protection for appropriate internal and protected construction environments.
• Structural approval: Covered by European Technical Assessment ETA-19/0553 for use as a self-tapping screw in timber construction.

These long structural timber screws can be used to secure timber components through insulation or other non-load-bearing layers into a suitable timber substrate. The 220mm overall length makes this variation suitable where substantial fixing depth is required.

Typical applications include:

• Warm roof and over-rafter insulation systems
• Fixing counter-battens through insulation into timber rafters
• Timber-to-timber structural connections
• Roof and façade substructures where specified by the system design
• Connections involving structural softwood, solid timber, glulam or engineered timber products within the approved conditions

Technical note: The required screw length, fixing angle, spacing, quantity and embedment depth must be established from the insulation-system requirements, current HECO guidance and the project-specific structural design. The A3K zinc-plated finish should only be used in a suitable exposure and service environment.

• HECO-TOPIX-plus Declaration of Performance – ETA-19/0553
• European Technical Assessment ETA-19/0553

Technical note: Always use the latest manufacturer documentation and project-specific design when determining the required fixing specification.