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Exterior Green Hex Timber Screws
Heavy-duty exterior wood screws designed for decking, sleepers and treated timber landscaping projects.
Timco Exterior Green Hex Timber Screw – 6.7mm x 100mm – Bag of 50
In stock
£8.24 ex VAT(£9.89 inc VAT)
SKU:
100INDEXTB
Timco Exterior Green Hex Timber Screw – 6.7mm x 100mm – Bag of 6
In stock
£1.58 ex VAT(£1.89 inc VAT)
SKU:
100INDEXP
Timco Exterior Green Hex Timber Screw – 6.7mm x 100mm – Box of 50
In stock
£7.74 ex VAT(£9.29 inc VAT)
SKU:
100IN
Timco Exterior Green Hex Timber Screw – 6.7mm x 100mm – Tub of 300
In stock
£46.33 ex VAT(£55.59 inc VAT)
SKU:
100INLT
Timco Exterior Green Hex Timber Screw – 6.7mm x 125mm – Box of 50
In stock
£9.33 ex VAT(£11.19 inc VAT)
SKU:
125IN
Timco Exterior Green Hex Timber Screw – 6.7mm x 150mm – Bag of 4
In stock
£1.58 ex VAT(£1.89 inc VAT)
SKU:
150INDEXP
Timco Exterior Green Hex Timber Screw – 6.7mm x 150mm – Box of 50
In stock
£12.49 ex VAT(£14.99 inc VAT)
SKU:
150IN
Timco Exterior Green Hex Timber Screw – 6.7mm x 150mm – Tub of 250
In stock
£61.99 ex VAT(£74.39 inc VAT)
SKU:
150INLT
Timco Exterior Green Hex Timber Screw – 6.7mm x 175mm – Bag of 4
In stock
£2.24 ex VAT(£2.69 inc VAT)
SKU:
175INDEXP
Timco Exterior Green Hex Timber Screw – 6.7mm x 175mm – Box of 50
In stock
£16.41 ex VAT(£19.69 inc VAT)
SKU:
175IN
Timco Exterior Green Hex Timber Screw – 6.7mm x 200mm – Bag of 20
In stock
£7.41 ex VAT(£8.89 inc VAT)
SKU:
200INDEXTB
Timco Exterior Green Hex Timber Screw – 6.7mm x 200mm – Bag of 4
In stock
£2.83 ex VAT(£3.39 inc VAT)
SKU:
200INDEXP
Timco Exterior Green Hex Timber Screw – 6.7mm x 200mm – Box of 50
In stock
£17.74 ex VAT(£21.29 inc VAT)
SKU:
200IN
Timco Exterior Green Hex Timber Screw – 6.7mm x 225mm – Bag of 4
In stock
£3.08 ex VAT(£3.69 inc VAT)
SKU:
225INDEXP
Timco Exterior Green Hex Timber Screw – 6.7mm x 225mm – Box of 50
In stock
£23.66 ex VAT(£28.39 inc VAT)
SKU:
225IN
Timco Exterior Green Hex Timber Screw – 6.7mm x 250mm – Bag of 4
In stock
£3.49 ex VAT(£4.19 inc VAT)
SKU:
250INDEXP
Timco Exterior Green Hex Timber Screw – 6.7mm x 250mm – Box of 50
In stock
£26.24 ex VAT(£31.49 inc VAT)
SKU:
250IN
Timco Exterior Green Hex Timber Screw – 6.7mm x 60mm – Box of 50
In stock
£5.33 ex VAT(£6.39 inc VAT)
SKU:
60IN
Exterior Green Hex Timber Screws are high-performance exterior wood screws designed for strong timber-to-timber fixing in outdoor environments. Coated with a patented multi-layer corrosion-resistant plating tested to 1,000 hours salt spray resistance (BS EN 9227:2012), they provide long-term protection for decking, fencing, sleeper walls and general landscaping work.
Designed as a modern alternative to the traditional coach screw, these green hex head timber screws offer faster installation and stronger pull-together performance. The integrated fixed washer head delivers high clamping force, while allowing high torque driving with a socket or impact driver.
The 50° deep single thread provides excellent pull-out resistance in softwood and treated timber. Meanwhile, the helix shank removes debris as the screw drives, improving clamping efficiency and reducing resistance. A sharp 25° point with single slash tip helps reduce splitting, even at lower edge distances.
In most softwoods and treated timbers, a pilot hole is not required, helping to reduce installation time on site. For dense hardwoods or highly corrosive environments such as Green Oak, A4 stainless steel fixings should be used instead.
Why Choose Exterior Green Wood Screws for Decking?
Exterior green wood screws are ideal for treated timber projects because:
- The green coating blends with pressure-treated timber
- The 1,000hr corrosion resistance protects against outdoor moisture
- The deep thread delivers strong hold in decking subframes
- The hex head allows controlled, high-torque installation
They are commonly used for decking frames, sleeper retaining walls, pergolas, raised beds and fencing structures.
Available Sizes
| Diameter | Length (mm) | Typical Use |
|---|---|---|
| 6.7mm | 60mm | General timber fixing |
| 6.7mm | 75mm | Fencing & medium timber |
| 6.7mm | 87mm | Framing & landscaping |
| 6.7mm | 100mm | Decking subframes |
| 6.7mm | 125mm | Sleepers & heavy timber |
| 6.7mm | 150mm | Structural timber joints |
| 6.7mm | 175mm | Deep sleeper fixing |
| 6.7mm | 200mm | Large timber sections |
| 6.7mm | 250mm | Heavy structural applications |
Choosing the Right Length
As a general guide, select a screw that penetrates at least 2.5–3 times the thickness of the top timber into the base material.
- 50mm boards → 125–150mm screws
- Standard fencing → 75–100mm screws
- Sleepers → 150mm and above
Selecting the correct length ensures maximum structural holding strength and long-term performance outdoors.
