New arrival

SiDAX Exterior Timber Frame Screws 8mm Hex Head Green (Box of 50)

Engineered for heavy-duty structural applications.

Sidax

From £9.00

Size

Type 17 cutter tip

Exterior tested to 1000hrs salt spray

8mm hex head

Ships today if you order within --hrs --mins

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Tackle your most demanding structural landscaping and construction projects with SiDAX Hex Head Timber Frame Screws. Specifically engineered for heavy-duty timber applications, these robust fasteners combine a high-torque 8mm hex head with advanced thread geometry to ensure incredibly fast, split-free penetration. Finished in a specialized exterior Green Ruspert coating that has endured rigorous 1000-hour salt spray testing, they offer uncompromising corrosion resistance while seamlessly blending into pressure-treated wood. Supplied in a convenient box of 50, they are the ultimate choice for framing, fencing, and decking.

Extreme Weather Resistance: Coated in an advanced Green Ruspert finish, tested to withstand 1000 hours of harsh salt spray for ultimate outdoor longevity.

High-Torque Hex Drive: The 8mm hex head allows for maximum rotational force using a socket or nut setter, completely eliminating driver bit slippage.

Self-Drilling Efficiency: Features a Type 17 cutter tip (slash point) for a rapid start and deep wood penetration, effectively removing the need for pre-drilling.

Uncompromising Structural Power

When assembling heavy timber frames, pergolas, or retaining walls, you need a fastener that won't cam out or strip under immense pressure. The SiDAX Timber Screw features a solid 8mm hexagon head, allowing you to use a socket driver to apply massive amounts of torque safely. Once driven, the deep 40° single thread bites aggressively into the timber, providing a secure, structural hold that resists shear forces and prevents joints from pulling apart over time.

Intelligent Anti-Split Technology

Driving thick structural screws often risks splitting the timber, which ruins the structural integrity of your project. This screw is engineered to prevent that entirely. It starts with a Type 17 cutter tip (often called a slash point), which acts like a drill bit to carve its own pilot hole. Further up the shank, specialized knurling grinds away excess wood debris, slightly widening the hole for the unthreaded upper section. This drastically reduces the friction on your drill battery and allows the screw to clamp the two pieces of timber tightly together without causing the wood to bulge or split.

1000-Hour Ruspert Protection

Landscaping timber is almost always pressure-treated with chemicals that can be highly corrosive to standard zinc screws. Furthermore, outdoor structures are constantly exposed to rain and varying temperatures. The SiDAX screw is fortified with a premium Green Ruspert exterior plating. This advanced coating has been independently tested to survive 1000 hours of direct salt spray, ensuring your fasteners will not rust, degrade, or fail under harsh environmental conditions. As an added bonus, the green hue blends seamlessly with treated wood for a professional, unobtrusive finish.

Key Features

Type 17 Slash Point: Actively cuts and clears wood fibers as it drives, drastically reducing the risk of the timber splitting, even when driving close to the edge.
Knurled Shank: Strategically placed knurling clears debris from the hole and slightly widens the channel above the thread, reducing driving friction and improving clamping force.
Deep 40° Single Thread: Provides exceptional pull out resistance and secure anchoring in both softwoods and dense landscaping timbers.
Aesthetic Integration: The green exterior plating camouflages perfectly against standard pressure treated sleepers and joists.
Heavy Duty Trade Pack: Supplied in a box of 50 pieces, perfect for large structural frames and retaining walls.

Key Features
Brand: SiDAX
Head Type: 8mm Hexagon Head
Thread Type: Partial 40° Deep Single Thread
Point Type: Type 17 Cutter Tip (Slash Point)
Shank Feature: Knurling for debris removal
Coating: Exterior Green Ruspert
Corrosion Resistance: 1000 Hours Salt Spray Tested
Pack Quantity: Box of 50 Pieces
Ideal Applications: Timber frames, fencing, retaining walls, landscaping
Whats in the box?
Timber Frame Screws With Hex Head in Exterior Green Pack of 50
Free Socket Driver
SiDAX Exterior Timber Frame Screws 8mm Hex Head Green (Box of 50)

Frequently Asked Questions

Do I need to drill a pilot hole for these screws?

In the vast majority of softwoods and standard landscaping timbers, no pilot hole is required. The Type 17 slash point is designed to cut its own path and prevent splitting. However, when working with very dense hardwoods, a small pilot hole is still recommended to reduce driving friction.

What exactly is a "Ruspert" coating?

Ruspert is a high-grade, multi-layered anti-corrosion coating. It typically consists of a baked ceramic surface layer over a chemical conversion film and a metallic zinc layer. This combination provides vastly superior rust resistance compared to standard galvanizing, especially against the chemicals found in treated timber.

Why is the screw only partially threaded?

A partial thread is essential for clamping two pieces of wood tightly together. The unthreaded shank allows the top piece of timber to slide tightly against the bottom piece as the screw is driven home, whereas a fully threaded screw can sometimes hold the two pieces apart (known as "jacking").