JG Timberfast Structural Screw Green Flush Head 6.3mm

JG Timberfast structural screws in 6.3mm diameter offer a flush Torx head design built for timber frame construction, decking, and outdoor structural fixing. The green corrosion-resistant coating makes them suitable for use with treated timber and exposed environments across all standard applications.

Specifications

What it's used for

• Timber frame construction and structural joinery connections
• Decking board fixing and subframe assembly
• Fencing components including rails, posts, and gravel boards
• General outdoor carpentry where a flush, neat finish is required

Fitting and handling

The Torx drive reduces cam-out during installation, which is useful when fixing at pace through hardwoods or dense treated timber. No pre-drilling is required in most softwood applications, but pilot holes are recommended in hardwood or close to timber edges to prevent splitting. Store unused screws in a dry location, as the green coating is corrosion-resistant rather than fully rustproof in prolonged standing water.

FAQ

Are these screws suitable for use with pressure-treated timber?

Yes. The green coating on JG Timberfast 6.3mm structural screws is designed to resist the corrosive chemicals found in modern pressure-treated and tanalised timber, making them a practical choice for outdoor structural work.

What Torx bit size do I need for 6.3mm Timberfast screws?

JG Timberfast 6.3mm screws typically require a T30 Torx bit. Check the specific product packaging to confirm, as drive sizes can vary between batches or product ranges.

Which length should I choose for decking boards?

For standard 32mm or 38mm decking boards fixed to a softwood joist, the 100mm length is a common choice, giving good pull-through resistance without over-penetrating the joist. For thicker boards or where greater structural load is expected, the 125mm or 150mm options provide additional holding strength.

Pair these screws with structural and decking timber from our decking collection at Nottage Timber Merchants. We supply trade and retail customers across Bridgend and South Wales, with next-day delivery available to many local areas.