Heavy-duty timber construction screws with a wafer head for strong clamping and a low profile finish. Corrosion-resistant coating handles external use. A proper alternative to coach screws without the faff of pre-drilling.
Size
QTY
Price
QTY
6.7 x 60 mm
50
£3.59£4.31
6.7 x 80 mm
50
£4.84£5.81
6.7 x 100 mm
50
£5.28£6.34
6.7 x 125 mm
50
£6.93£8.32
6.7 x 150 mm
50
£8.46£10.15
6.7 x 175 mm
50
£11.81£14.17
6.7 x 200 mm
50
£11.92£14.30
8.0 x 200 mm
50
£16.89£20.27
8.0 x 220 MM
50
£19.83£23.80
8.0 x 240 mm
50
£23.80£28.56
8.0 x 260 mm
25
£14.25£17.10
8.0 x 280 mm
25
£15.47£18.56
8.0 x 300 mm
25
£17.76£21.31
8.0 x 320 mm
25
£19.30£23.16
8.0 x 340 mm
25
£20.94£25.13
8.0 x 360 mm
10
£9.98£11.98
8.0 x 400 mm
10
£12.52£15.02
Index Timberlok wafer head timber construction screws are designed for serious structural timber work. These are the screws you reach for when coach screws feel like overkill but standard wood screws won’t cut it. The wafer head pulls timber faces together with genuine clamping force while sitting nearly flush no proud heads catching on everything.
The patented multi-layer coating handles 1,000 hours of salt spray testing to BS EN 9227:2012, which translates to proper outdoor durability. Use them externally with confidence. The coating also includes a lubrication layer that makes driving noticeably easier, particularly in dense hardwoods or when you’re thirty screws into a long day.
Why Tradespeople Choose These Over Coach Screws
Coach screws need pre-drilling and a spanner. These don’t. The single slash point and 25-degree tip reduce splitting risk even near timber edges, and the TX30 recess gives solid bit engagement without camming out under torque. The helix shank clears debris as you drive, keeping the thread path clean.
The 50-degree deep single thread delivers high pull-out resistance these grip and stay put. Available in 6.7mm and 8.0mm shanks with lengths from 60mm up to 400mm, there’s a size for everything from deck joist connections to structural beam work.
Typical Applications
Timber frame construction, pergolas, carports, garden structures, fence posts to rails, joist hangers, purlin fixings, and anywhere you’d traditionally reach for a coach screw but want the job done faster. The wafer head works particularly well where you need the screw to pull tight without a washer.
Pro Tip: Run the screw in at full speed until the last few turns, then slow right down to seat the wafer head without overtightening you want clamping force, not crushed fibres.
These screws suit any timber-to-timber structural connection where clamping force and corrosion resistance matter. Common jobs include fixing joists to beams, securing pergola posts and rafters, attaching fence rails to posts, and connecting deck frames. The wafer head makes them a good choice for joist hanger installations where a countersunk head would reduce the bearing surface. External projects in particular benefit from the salt spray rated coating garden rooms, carports, raised decking, and timber frame extensions are all fair game.
Best For
Timber frame structural connections
Deck and pergola construction
Joist-to-beam fixings
Fence post to rail joints
Replacing coach screws
Compatible Materials
Softwood timber
Hardwood timber
Treated timber
Engineered timber products
OSB and plywood
Key Features
1,000 hour salt spray corrosion resistance
TX30 recess for positive bit engagement
Helix shank clears debris during driving
Single slash point reduces splitting
Wafer head for strong clamping without washer
Not suitable for: Not intended for masonry fixings or steel-to-timber connections. For load-bearing structural work, always check fixing requirements against building regulations and engineer specifications.
No pre-drilling required in most softwoods. In hardwoods or near timber edges, a pilot hole slightly smaller than the shank diameter helps avoid splitting. Use a TX30 bit and drive at steady speed. The lubricated coating means less resistance than you might expect from a screw this chunky.
Select the correct length allow at least 40mm penetration into the receiving timber
Position the screw and start with firm pressure to engage the sharp point
Drive at full speed through the main length of the screw
Slow down for the final turns to seat the wafer head flush without over-tightening
In hardwood or close to edges, drill a pilot hole 80% of shank diameter first
Can I use these screws externally without any additional treatment?
Yes. The multi-layer coating is tested to 1,000 hours salt spray resistance under BS EN 9227:2012, making them suitable for external use including exposed garden structures and decking.
Do I need to pre-drill for these screws?
Generally not in softwood. The single slash point and sharp tip are designed to reduce splitting. For hardwoods, dense timber, or fixings close to the edge, a pilot hole slightly smaller than the shank helps.
What's the difference between the 6.7mm and 8.0mm shanks?
The 8.0mm screws are beefier and available in longer lengths up to 400mm use these for heavier structural connections or where you need maximum holding power. The 6.7mm range covers most standard timber frame and decking work.
Are these a direct replacement for coach screws?
In most timber-to-timber applications, yes. They offer similar or better holding power without needing pre-drilling or a spanner. For load-bearing structural work, verify the fixing specification meets your project requirements.
What driver bit do I need?
TX30 Torx bit. The recess is designed for high torque transfer without cam-out, so a quality bit makes a difference.
Index Timberlok screws feature carbon steel construction with a patented multi-layer corrosion coating tested to 1,000 hours salt spray per BS EN 9227:2012. The 50-degree single thread provides high pull-out values while the helix shank design evacuates debris during insertion. Available in 6.7mm shank (60mm to 200mm lengths) and 8.0mm shank (200mm to 400mm lengths), supplied in boxes of 25 or 50 depending on size.
Head Type
Wafer head countersunk
Recess
TX30 Torx
Material
Carbon steel
Coating
Multi-layer corrosion resistant with lubrication
Corrosion Resistance
1,000 hours salt spray (BS EN 9227:2012)
Thread Angle
50° deep single thread
Point Type
25° single slash point
Shank Sizes
6.7mm and 8.0mm
Length Range
60mm to 400mm
Box Quantities
25 or 50
Size
6.0 x 100mm, 6.7 x 100 mm, 6.7 x 125 mm, 6.7 x 150 mm, 6.7 x 175 mm, 6.7 x 200 mm, 6.7 x 60 mm, 6.7 x 75 mm, 6.7 x 80 mm, 6.7 x 95 mm, 8.0 x 200 mm, 8.0 x 220 MM, 8.0 x 225 mm, 8.0 x 240 mm, 8.0 x 250 mm, 8.0 x 260 mm, 8.0 x 275 mm, 8.0 x 280 mm, 8.0 x 300 mm, 8.0 x 320 mm, 8.0 x 340 mm, 8.0 x 350 mm, 8.0 x 360 mm, 8.0 x 400 mm
Box Quantity
10, 25, 50
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