Structural timber screws with a flat head, Torx drive, and corrosion-resistant tan coating. No pre-drilling needed in most timber. Suitable for decking, framing, sleepers, and heavy-duty timber assembly.
Size
Price
QTY
7.0 x 65mm
£6.84£8.21
7.0 x 75mm
£7.33£8.80
7.0 x 87mm
£7.83£9.40
7.0 x 95mm
£8.32£9.98
7.0 x 100mm
£8.83£10.60
7.0 x 125mm
£11.06£13.27
7.0 x 150mm
£13.31£15.97
7.0 x 175mm
£16.51£19.81
7.0 x 200mm
£19.71£23.65
7.0 x 225mm
£23.89£28.67
7.0 x 250mm
£28.07£33.68
ForgeFast flat head construction screws are built for structural timber work where pull-out resistance matters and a flush finish is required. The flat head with under-head ribs countersinks cleanly into timber without lifting or leaving a proud edge, making them a solid choice for decking boards, timber framing, and structural assembly where the surface needs to look tidy as well as hold firm.
The cutting point and serrated thread geometry do the hard work for you. In most timber types, these screws drive straight in without pre-drilling, which saves a meaningful amount of time when you are fixing hundreds of boards or running through a framing job. Less splitting, fewer cracked boards, and no constant swapping between drill and driver.
Where ForgeFast Flat Head Construction Screws Perform
These screws are sized for heavy-duty work. The 7.0mm diameter gives real holding strength in thick structural timbers, hardwood decking, railway sleepers, and engineered wood products. The full range runs from 65mm up to 250mm, so whether you are fixing through a 47mm joist or laminating thick sleepers together, there is a length for the job.
The tan coating provides reliable corrosion protection for external use, including exposed decking and landscaping structures. It is not a decorative finish, but it does blend reasonably well with treated timber, which is a bonus on visible fixings.
Torx Drive for High-Torque Work
The Star/Torx drive prevents cam-out during heavy driving, which matters when you are using an impact driver at full torque. It protects the screw head and keeps the bit engaged. If you have ever stripped a Pozi head halfway through a long screw, you will appreciate the difference quickly enough.
Pro Tip: When fixing hardwood decking with these, apply a small amount of wax or candle grease to the screw thread before driving to reduce friction and get a cleaner, more controlled countersink without burning the wood surface.
ForgeFast flat head construction screws are used across a wide range of structural timber applications. Decking installation is the most common use, particularly with hardwood and pressure-treated softwood boards where a flush, clean finish matters. They are equally at home in timber frame construction, joist fixing, stud work, and garden structures such as pergolas, raised beds, and retaining structures built with railway sleepers.
The longer lengths in the range suit laminating structural timber, fixing through thick sections, and securing heavy landscape timbers where a standard 4mm or 5mm screw simply would not cut it. Groundworks contractors, decking specialists, and general builders all reach for screws in this size bracket regularly.
Best For
Hardwood and softwood decking
Timber frame and stud work
Railway sleeper fixing
Structural timber assembly
Garden structures and pergolas
Joist and noggin fixing
Compatible With
Pressure-treated softwood
Hardwood decking boards
Engineered timber and LVL
Railway sleepers
Green oak and structural oak
Standard Torx/Star drive bits
Key Specifications
Diameter: 7.0mm
Lengths: 65mm to 250mm
Drive: Torx/Star
Head type: Flat countersunk with under-head ribs
Finish: Tan corrosion-resistant coating
50 screws per tub
Not suitable for: Not suitable for use in masonry, concrete, or metal without appropriate fixings. The tan coating is designed for external timber use but is not rated for fully submerged or permanently wet conditions such as dock or marine applications.
No pilot hole is required in most softwood and medium-density timbers. In hardwoods or when fixing close to an end grain edge, a pilot hole the same diameter as the screw shank will prevent splitting and give a cleaner result. Mark your fixing positions before you start, particularly on decking where spacing consistency matters.
Use an impact driver with a Torx bit matched to the drive size. Set the depth so the flat head sits flush or just below the timber surface. The under-head ribs bite in and stop the head spinning, so you get a clean countersink without the screw over-driving or the head pulling through.
Select the correct length for your timber thickness, allowing for at least 50mm of thread engagement into the receiving timber
Mark fixing positions to ensure consistent spacing, especially on decking runs
For hardwood or end-grain fixing, drill a pilot hole matching the shank diameter to prevent splitting
Fit a Torx drive bit to your impact driver and set the clutch or use driver control to avoid over-driving
Drive the screw steadily until the flat head sits flush with or just below the timber surface
Check the head is fully seated and not proud, particularly on decking boards that will see foot traffic
Do these screws need pre-drilling in all timber types?
Not in most cases. The cutting point and serrated threads handle softwood and pressure-treated timber without a pilot hole. For hardwoods such as Balau, Ipe, or Cumaru, or when fixing close to the end of a board, a pilot hole is worth the extra step to avoid splitting and get a cleaner finish.
Are these suitable for permanent external use such as decking and garden structures?
Yes. The tan corrosion-resistant coating is designed for external timber applications including decking, pergolas, and sleeper work. They are not intended for permanently submerged or marine conditions, but for standard outdoor use in the UK climate they perform well over the long term.
ForgeFast flat head construction screws are manufactured to handle the load demands of structural timber work. The 7.0mm diameter provides high pull-out and shear resistance across the size range. The serrated thread geometry reduces friction during driving and minimises splitting in grain-sensitive timbers. The under-head ribs on the flat countersunk head lock the screw in position and prevent rotation as it seats. The tan coating offers corrosion resistance suited to external timber environments including treated and preservative-impregnated wood.
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