C2 Deck-Fix Decking Screws – Green Exterior Coated

High-performance C2 decking screws with twin-cut tip, green exterior coating, and reinforced head – built for fast, split-free fixing in timber decking.

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C2 Deck-Fix Decking Screws are built for outdoor decking jobs that demand strength, speed and a clean finish. Coated in a corrosion-resistant green finish and packed with clever design features, these screws are made to outperform standard decking screws on every level.

The twin-cut tip makes for a fast start and helps avoid splitting, while the helix shank clears debris as the screw drives in – giving better grip and cleaner installs. Ribs under the head help countersink neatly, and the strengthened head is designed to handle impact drivers without shearing.

✔ Twin-cut tip for fast pick-up and reduced splitting
✔ Helix shank clears dust and improves grip
✔ Ribbed head for a tidy, countersunk finish
✔ Green organic coating – up to 1,000 hours corrosion protection
✔ Strong head designed for power tools
✔ Part-threaded for better board-to-joist clamping

Screws vs Nails – What’s Better for Decking?
While nails were once the go-to, decking screws have taken over – and with good reason. C2 Deck-Fix Screws provide a stronger hold, cleaner finish, and reduce the risk of boards loosening over time.

Screws won’t work loose like nails often do – especially in areas with temperature or moisture changes

  • Less bounce, less squeak – because the screws clamp the boards down tight
  • Neater appearance – the ribs under the head help the screw sit flush
  • Easier to remove or replace decking boards if needed later on

If you're still nailing down boards, it's time to move over – your deck (and your back) will thank you later.

Why Are These Screws Only Partially Threaded?
The thread on C2 Deck-Fix Screws only runs up about two-thirds of the length – and that’s on purpose. This design helps pull the deck board down tightly onto the joist as you drive the screw in.

The smooth section above the thread allows the head to keep moving while the thread stays locked below – creating that firm clamping pressure every deck needs to stay solid and quiet underfoot.

What Size Decking Screws Do You Need?
As a general rule, decking screws should be 2.5 times the thickness of the board you're fixing. So if your decking boards are 25mm thick, go for at least 63mm screws.

Here’s a quick reference:

  • 22mm board = 55mm screw minimum
  • 25mm board = 63mm screw minimum
  • 32mm board = 80mm screw minimum
  • 38mm board = 95mm screw minimum

Always go longer if you're unsure – better clamping strength and more grip in the joist.

Why Buy C2 Deck-Fix Decking Screws from Fast Fixings Online?

When you buy your C2 Deck-Fix Decking Screws from Fast Fixings Online, you’re getting more than just great fixings. We offer free next working day delivery on orders over £60, so your materials arrive when you need them. You can create a free account to save time on repeat orders, and if you join our VIP Rewards Club, the more you spend, the more you save. It’s our way of giving something back to loyal trades and customers who keep coming back.