Wood construction screw PGB PFS+ T-drive 8 x 400 mm, zinc-plated

Wood construction screw PGB PFS+ T-drive 8 x 400 mm, zinc-plated is a heavy-duty fastener designed for joining large timber elements and structural wood components. With an 8 mm diameter and 400 mm length, this screw provides deep penetration and high withdrawal resistance. The zinc-plated finish offers basic corrosion protection for use in both indoor and certain outdoor applications where enhanced corrosion resistance is not required. The T-drive head ensures secure engagement with compatible bits, reducing cam-out and enabling efficient installation with power drivers.

Advantages

The combination of a long 400 mm shank and robust 8 mm thickness delivers reliable structural connections and high load-bearing capacity. The T-drive head improves bit seating and torque transfer, which decreases stripping and speeds up assembly. Zinc plating adds a layer of corrosion resistance suitable for many construction environments while maintaining dimensional stability and consistent thread performance for timber joining.

Suitable for

• Joining heavy timber beams, posts, and large section lumber
• Structural wood connections in framing, decking substructures, and pergola construction
• Indoor and covered outdoor structural projects where zinc plating is acceptable
• Situations requiring deep penetration and high withdrawal resistance

Key specifications

• Length: 400 mm
• Diameter: 8 mm
• Drive type: T-drive (for matching T-drive bits)
• Finish: Zinc-plated
• Application material: Solid wood and engineered timber
• Head style: Countersinking head designed for flush or near-flush seating

How to use

Select an appropriate T-drive bit and power driver compatible with the screw head to ensure secure engagement and efficient torque transfer. Pre-drill a pilot hole when required by timber type or to prevent splitting, especially near edges or in hardwoods; choose a pilot diameter and depth according to timber density and the screw’s dimensions. Drive the screw at steady speed, maintaining axial alignment to avoid bending. For flush installation, tighten until the head is level with the timber surface; avoid over-torquing to preserve thread integrity and the corrosion-resistant coating.

Usage recommendations

Use zinc-plated screws in covered outdoor areas or where limited exposure to moisture is expected; for prolonged outdoor, coastal, or chemically aggressive environments, consider screws with higher corrosion resistance. Store fasteners in a dry place and use matching T-drive bits to reduce wear and ensure consistent installation quality.