Timberfix Landscape Screws Hex Flange Head Black Coated – Heavy-Duty Exterior Timber Fixings

Timberfix Landscape Screws Hex Flange Head Black Coated are heavy‑duty, exterior‑grade timber screws designed for landscaping, decking and structural outdoor timber work. Featuring a robust hex flange head, deep wood thread and a durable black corrosion‑resistant coating that has been tested to 1,000 hours salt spray, they are ideal for sleepers, retaining walls, decking subframes, pergolas, fences and garden structures.

Timberfix Landscape Screws Hex Flange Head Black Coated are designed to simplify and speed up structural timber construction outdoors. Instead of using traditional coach screws or through‑bolts that require access from both sides or multiple operations, these landscape screws allow you to assemble heavy timbers from one side with a power driver.

The hex flange head provides a broad bearing surface for strong clamping and resists pulling into the timber, while the deep, coarse thread provides excellent pull‑out resistance in softwood and pressure‑treated timber. Many Timberfix landscape screws have a self‑cutting / slash / type 17 style tip that helps reduce the risk of splitting and cuts down on pre‑drilling requirements in standard softwoods (always check the exact product specification).

The black exterior coating is a hardwearing, corrosion‑resistant finish that has been tested to 1,000 hours neutral salt spray (to the relevant test method), providing enhanced durability for external use. The black colour delivers a clean, modern aesthetic – particularly suited to
black-clad garden structures, dark decking systems, charred timber finishes and contemporary landscaping schemes.

These screws are widely used by landscapers, decking installers, fencing contractors, carpenters and serious DIY users for building:

• Timber sleeper walls and raised beds
• Decking frames, steps and platforms
• Pergolas, gazebos, arches and screening
• Fences, gates and heavy-duty rails
• Garden seating, planters and timber features

Typical Use Cases

• Fixing sleepers together for retaining walls, steps and planters.
• Assembling deck joists, bearers and rim beams into rigid frames.
• Building pergolas and overhead structures from posts and beams.
• Securing fence posts, rails and gates where strong screw fixings are preferred.
• Joining heavy landscaping timbers in public and private gardens.

Installation & Best Practice Tips

1. Select correct length: Choose a screw long enough that a good portion of the thread (typically at least 2–3× diameter) is embedded into the main member, while avoiding punch‑through.
2. Pre‑drill where appropriate:
   • In dense or hardwoods, pre‑drill pilot holes.
   • Pre‑drill near edges, ends or in thin sections to minimise splitting.
   • Use recommended pilot sizes from Timberfix data where available.
3. Use a suitable driver: Drive with a corded or cordless drill/driver or impact driver using the correct size hex socket (commonly 13mm or similar – check your screws).
4. Clamp or hold timbers tight: Bring timbers snugly together before driving to avoid gaps and ensure joints pull up tight.
5. Drive at controlled speed: Start slowly to allow the tip to bite, then increase to a moderate speed. Avoid extended high‑speed spinning once the head seats.
6. Do not over‑tighten: Stop driving as soon as the flange head is firmly seated and the joint is tight. Over‑tightening can crush timber fibres and reduce holding capacity.
7. Follow good spacing practice: Use multiple screws per joint for heavier loads, and keep a sensible distance from timber ends and edges to avoid splits.

Always follow Timberfix manufacturer guidance on load data, pilot holes, corrosion class and installation instructions for the specific product variant you are using.

Available Sizes (Pack of 50)

Choose the length that suits your material thickness and embedment requirements:

• 6.3 × 75mm (50)
• 6.3 × 90mm (50)
• 6.3 × 100mm (50)
• 6.3 × 125mm (50)
• 6.3 × 150mm (50)
• 6.3 × 200mm (50)
• 6.3 × 250mm (50)

Diameter: 6.3mm
Pack size: 50 screws

Timberfix Landscape Screws Hex Flange Head Black Coated Features

• Landscape-grade timber screw – designed for heavy-duty outdoor timber connections.
• Hex flange head – large bearing area for superior clamping and easy driving with a hex socket.
• Black coated finish – 1,000-hour salt spray rated – durable, high‑performance corrosion protection for demanding external environments.
• Deep coarse thread – high pull‑out resistance in structural softwoods and treated timbers.
• Self‑cutting / type 17 style tip (typical) – helps reduce splitting and lowers driving torque in softwood (confirm spec on listing).
• High-strength steel – hardened steel core for structural performance (see data for exact grade).
• Range of lengths – 6.3mm diameter in 75–250mm lengths to suit sleepers, posts, beams and joists.
• Trade-quality performance – suitable for professional landscaping, decking and fencing contractors.

Technical Information

• Product type: Landscape timber screw with hex flange head.
• Brand: Timberfix (Landscape range).
• Head type: Hex flange head for driving with a hex socket.
• Drive: Hex (across flats size as specified – often 13mm; check packaging).
• Diameter: 6.3mm.
• Available lengths (all packs of 50):
  • 6.3 × 75mm
  • 6.3 × 90mm
  • 6.3 × 100mm
  • 6.3 × 125mm
  • 6.3 × 150mm
  • 6.3 × 200mm
  • 6.3 × 250mm
• Pack size: 50 screws per length.
• Thread: Coarse wood thread, often partially threaded to improve clamping (see product datasheet).
• Tip: Usually self‑cutting / slash / type 17 point for reduced splitting and easier starting in softwood.
• Material: Hardened steel (exact grade per Timberfix specification).
• Finish / coating: Black exterior corrosion‑resistant coating, independently tested to 1,000 hours neutral salt spray for long-term protection in typical external above‑ground applications. For marine or highly aggressive environments, confirm suitability with manufacturer/supplier.
• Applications: Timber‑to‑timber fixings in landscaping, decking, fencing, garden structures and outdoor carpentry.
• Performance & standards: For pull‑out strengths, shear values, salt spray test method and any applicable standards, refer to the latest Timberfix technical data.

For engineered or safety‑critical structures (e.g. high retaining walls, elevated decks), ensure screw selection, size, spacing and detailing are approved by a structural engineer or competent designer and comply with local building regulations.

Frequently Asked Questions – Timberfix Landscape Screws Hex Flange Head Black Coated

1. What are these screws mainly used for?

They’re designed for heavy-duty outdoor timber projects such as landscaping sleepers, deck frames, pergolas, fences, gates and garden structures. Anywhere you need strong, corrosion‑resistant timber‑to‑timber fixings outdoors, these landscape screws are ideal.

2. What’s the advantage over coach screws or bolts?

Landscape screws can usually be installed:

• From one side only (no need to access the back for nuts)

• Faster, using a power driver and hex socket

• With reduced pre‑drilling (especially in softwood, thanks to self‑cutting tips)
This saves time and labour compared with drilling through and using coach bolts and washers, or traditional coach screws that often require pilot holes.

3. Do I always need to pre‑drill?

Not always. In most softwoods and standard treated timbers, the self‑cutting tip will allow direct driving without pre‑drilling. However, you should pre‑drill:

• In hardwoods

• Near edges, ends or knots where splitting is a risk

• For very long screws or tight tolerance joints
Follow the Timberfix data or good practice for recommended pilot sizes.

4. Can I use these in direct ground contact?

The black coating is 1,000-hour salt spray rated, offering excellent corrosion resistance for above‑ground external conditions. For direct ground contact, constant wetting or very aggressive environments, you may still need stainless steel or specially rated ground‑contact fixings. Always refer to the product specification and project requirements.

5. What tools do I need to install them?

A corded or cordless drill/driver or impact driver with an appropriate hex socket (e.g. 13mm or as specified) is ideal. Impact drivers are particularly effective for longer screws and dense timbers. Use variable speed and avoid over‑driving once the head seats.

Timberfix Landscape Screws Hex Flange Head Black Coated Common Uses / How to Use

Common Uses

• Building timber sleeper retaining walls and steps.
• Constructing decking subframes, platforms and garden terraces.
• Assembling pergolas, gazebos, screens and outdoor seating.
• Fixing fence posts, rails, gate frames and bracing.
• General landscaping carpentry in domestic gardens and public spaces.

How to Use – Step-by-Step Summary

1. Plan fixing points: Decide number, spacing and length of screws based on timber size and load.
2. Mark and pre‑drill (if required): Mark screw positions and drill pilot holes in dense timber or near edges as needed.
3. Set up your driver: Fit the correct size hex socket to your drill/driver or impact driver.
4. Bring timbers together: Clamp or hold timbers in their final position, ensuring good contact.
5. Drive the screw: Drive at 90° to the timber using moderate speed, letting the tip cut its own path and the thread draw the joint tight.
6. Seat the head: Stop once the flange head is firmly seated and the joint is tight. Do not over‑drive.
7. Repeat: Install remaining screws to the planned pattern for even load distribution.