Timberfix Twinthread Wood Screws

Timberfix Twinthread Wood Screws are high‑quality, general‑purpose woodscrews designed for fast,
secure fixing in timber, composite boards and masonry (with plugs). With a sharp point, twin‑start
thread and countersunk head, these versatile screws are ideal for everyday carpentry, joinery, DIY
and light construction work where reliable holding power and clean finishes are required.

Timberfix Twinthread Wood Screws are classic twin‑threaded steel woodscrews engineered for fast,
dependable fixing across a wide range of applications. The twinthread shank gives rapid insertion
and strong holding power in timber and plastic wall plugs, while the countersunk head allows for a
neat, flush finish that can be left visible or filled and finished.

These screws can be driven directly into softwood and many manufactured boards, and used with
appropriate wall plugs for secure fixing into brick, block or concrete. Available in a choice of
head/drive styles (commonly Pozi / cross‑recess – check variant), Timberfix Twinthread Wood Screws
are ideal for mounting battens, fixing hardware, hanging brackets and completing general interior
construction, repair and maintenance tasks.

Supplied in a wide range of diameters and lengths, typically with a bright zinc plated or similar
corrosion‑resistant finish, Timberfix Twinthread Wood Screws provide a reliable, everyday fixing
solution for both trade professionals and DIY users.

Typical Use Cases

Fixing hinges, brackets, clips, plates and cleats to timber.
Mounting battens, laths and timber grounds to masonry (with wall plugs).
Fitting door furniture, catches, stays and other light hardware.
General joinery and carpentry in softwood, prepared hardwood and sheet materials.
Routine DIY installations and repairs around homes, offices and workshops.

Installation & Usage Tips

Select the right gauge & length: Choose screw size appropriate to material thickness and load; use longer screws for heavier items.
Pre‑drill dense materials: In hardwoods, MDF and near edges, drill a pilot hole to prevent splitting and ease driving.
Always use plugs in masonry: For brick, block or concrete, drill and insert suitable wall plugs before driving screws.
Use the correct driver bit: Match Pozi / cross‑recess or slotted heads to the right screwdriver or bit size to reduce cam‑out.
Avoid over‑tightening: Drive until the head is just flush; over‑tightening can strip the thread in timber or plugs.

Technical Information (Typical)

Exact specification may vary by Timberfix product line, size and finish; always refer to the pack or
data sheet. Typical characteristics of Timberfix Twinthread Wood Screws include:

Type: Twinthread wood screw for timber and plug‑and‑screw masonry fixings.
Thread: Twin‑start coarse woodscrew thread over most or all of the shank.
Point: Sharp, self‑starting point (pilot recommended in dense materials).
Head: Countersunk head – commonly Pozi / cross‑recess (confirm head type on pack).
Material: Steel.
Finish: Typically bright zinc plated or other corrosion‑resistant coating suitable for internal use (check variant).
Suitable substrates: Softwood, many hardwoods, chipboard, MDF (with appropriate pilot), and masonry when used with suitable plugs.
Size range: Available in multiple gauges and lengths to suit light to medium duty fixings – see size chart or packaging.

For detailed sizing tables, recommended pilot drill sizes and load guidance, consult Timberfix
technical information or the specific product packaging for your chosen Twinthread Wood Screws.

Key Features

Twinthread shank – provides faster driving and strong bite in timber and plugs.
Countersunk head – enables flush, tidy finishes in wood and board materials.
Multi‑purpose fixing – suitable for timber‑to‑timber and plug‑and‑screw applications.
Corrosion‑resistant coating – protects screws in typical indoor and sheltered environments.
Consistent Timberfix quality – smooth driving, reliable performance and easy selection from a wide size range.

Frequently Asked Questions (FAQs)

1. What is the advantage of twinthread on Timberfix wood screws?

Twinthread uses two threads running up the shank, allowing the screw to drive faster while still
offering strong holding power in timber and wall plugs. It improves productivity compared to many
traditional single‑thread woodscrews.

2. Can Timberfix Twinthread Wood Screws be used in masonry?

Yes, but only with suitable wall plugs. Drill the recommended hole size, insert the plug flush with
the surface, then drive the screw into the plug for a secure fixing in brick, block or concrete.

3. Do I need a pilot hole for these screws?

In softwood and for smaller diameters, you can often drive them without a pilot. In hardwoods,
manufactured boards (like MDF) or near edges, a correctly sized pilot hole is recommended to reduce
splitting and make installation easier.

4. Are Timberfix Twinthread Wood Screws suitable for outdoor use?

Standard zinc‑plated versions are mainly for indoor or sheltered use. For fully exposed external
applications or very damp conditions, use Timberfix screws specifically rated for exterior use
(e.g. heavy‑duty coated or stainless steel variants) or check the coating specification on your
chosen product.

5. Which screwdriver bit should I use?

Match the head type specified on the box – most Timberfix Twinthread Wood Screws use Pozi / cross‑
recess heads, so a correctly sized Pozi bit (e.g. PZ1, PZ2) is recommended. Using the right bit size
improves grip, reduces cam‑out and protects both the bit and screw head.

Common Uses / How to Use

To get the best from Timberfix Twinthread Wood Screws:

Choose the correct gauge and length for the materials and expected load.
For timber‑to‑timber joints, mark fixing points and drill pilots where needed (hardwoods/edges).
For masonry, drill the appropriate hole, insert a suitable wall plug and tap it flush.
Position the fixture, align the screw through it into the timber or plug and drive using a matching driver bit.
Drive until the countersunk head is just flush with the surface; avoid over‑driving.
Use enough screws and an appropriate pattern to provide secure, long‑term support.

☁ Cloud Rating	Approx. Salt Spray Hours*	Description
☀ 1 Cloud	< 100 hrs	Indoor / fully sheltered use
🌤 2 Clouds	~100 – 500 hrs	Indoor + sheltered outdoor
🌦 3 Clouds	~500 – 1,000 hrs	General outdoor use with specialist coating
🌧 4 Clouds	~1,000 + hrs	A2 stainless steel – exterior use inland
⛈ 5 Clouds	1,000 + hrs / “marine grade”	A4 stainless – coastal / high-exposure use

*Approximate values based on typical corrosion testing standards (salt spray testing to first rust).

Marc’s Cloud Rating – Always First 4 Fixings Corrosion Resistance Guide

Choosing the right screw or fixing is all about matching it to the environment — especially when it comes to

corrosion resistance.

That’s why at Always First 4 Fixings, we’ve created a quick and simple way to help you pick the perfect product for any job:

☁️ Marc’s Cloud Rating

Each fixing on our site is given a Cloud Rating (☀️ to ⛈️) — your easy guide to how well it stands up to the weather. The more clouds, the more corrosion-resistant the fixing!

☀️ 1 Cloud – Indoor / Covered Outdoor Use

Designed for: Dry indoor environments or outdoor areas completely covered from the elements. Perfect for internal projects, garages, lofts, or sheltered spaces where moisture exposure is minimal.

🌤️ 2 Clouds – Indoor / Sheltered Outdoor Use

Designed for: Indoor use or external areas with some protection from direct rain or weather. Ideal for porches, under decking, or covered outdoor structures where occasional moisture may occur.

🌦️ 3 Clouds – General Outdoor Use

Designed for: Both indoor and outdoor use. Typically features specialist corrosion-resistant coatings and undergoes 500–1000 hours salt spray testing. Great for garden furniture, fencing, sheds, or exposed outdoor areas not constantly hit by sea air.

🌧️ 4 Clouds – A2 Stainless Steel

Designed for: Tough external environments. Made from A2 stainless steel, these screws are durable and weather-resistant — ideal for outdoor projects more than 10 miles inland. Reliable for all general external applications and completely fine for indoor use too.

⛈️ 5 Clouds – A4 Marine Grade Stainless Steel

Designed for: The harshest, most demanding environments. Made from A4 stainless steel (marine grade), these fixings offer maximum corrosion resistance — perfect for coastal areas, marine use, or anywhere exposed to salt air and constant moisture. The “big daddy” of weatherproof fixings — unbeatable outdoors, worry-free indoors.

How to Use Marc’s Cloud Rating

You’ll find the Cloud Rating (☀️–⛈️) shown on each product across our website. Simply match the rating to your project’s environment and know exactly how your fixing will perform — rain or shine! Always First 4 Fixings – Helping You Choose with Confidence.

Weight	N/A
Dimensions	N/A
Size	4 x 1/2" (200), 4 x 3/4" (200), 4 x 5/8" (200), 4 x 1" (200), 6 x 1/2" (200), 6 x 5/8" (200), 6 x 3/4" (200), 6 x 1" (200), 6 x 1 1/4" (200), 6 x 1 1/2" (200), 6 x 1 3/4" (200), 6 x 2" (200), 7 x 5/8" (200), 7 x 3/4" (200), 7 x 1" (200), 7 x 1 1/4" (200), 7 x 1 1/2" (200), 7 x 1 3/4" (200), 8 x 1/2" (200), 8 x 5/8" (200), 8 x 3/4" (200), 8 x 1" (200), 8 x 1 1/4" (200), 8 x 1 1/2" (200), 8 x 1 3/4" (200), 8 x 2" (200), 8 x 2 1/4" (200), 8 x 2 1/2" (200), 8 x 2 3/4" (200), 8 x 3" (100), 8 x 3 1/2" (100), 10 x 3/4" (200), 10 x 1" (100), 10 x 1 1/4" (100), 10 x 1 1/2" (200), 10 x 1 3/4" (200), 10 x 2" (200), 10 x 2 1/4" (100), 10 x 2 1/2" (100), 10 x 3" (100), 10 x 3 1/2" (100), 10 x 4" (100), 12 x 1" (200), 12 x 1 1/4" (200), 12 x 1 1/2" (200), 12 x 2" (100), 12 x 2 1/4" (100), 12 x 2 1/2" (100), 12 x 3" (100), 12 x 3 1/2" (100), 12 x 4" (100)

Shipping Policy

Always First 4 Fixings Courier Delivery Service

At Always First 4 Fixings, we know that your projects rely on fast, dependable delivery. That’s why we offer flexible UK shipping options designed for tradespeople and businesses: Fast Dispatch: Orders are processed and dispatched within 24 hours on working days. Free shipping on all orders over £60 (UK mainland). Express options available to keep your jobs moving. Click & Collect: Order online and pick up at your convenience (if applicable). Reliable Couriers: We use trusted UK carriers to ensure your fixings and fasteners arrive on time. You’ll receive tracking details as soon as your order leaves our warehouse. Delivery times may vary depending on location and availability, but we work hard to get your order to you as quickly as possible.

Returns Policy

We want you to be fully confident when ordering from Always First 4 Fixings. If your supplies aren’t right for any reason, we make returns straightforward: Return unused and undamaged items in original packaging within 30 days. Don’t forget your proof of purchase or order confirmation. Once we receive your return, we’ll process your refund or exchange promptly. Certain items may have specific exclusions or conditions—please read our detailed returns policy or contact us if you have questions. Our team is always here to help ensure you get exactly what you need for the job.

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Timberfix Twinthread Wood Screws | General-Purpose Countersunk Woodscrews