| Item | Details |
|---|---|
| Product Name | Countersunk Head Timber Screw |
| Raw Material | Grade 4.8 carbon steel |
| Surface Treatment | Yellow zinc plated |
| Available Sizes | 4.0mm, 4.8mm, 5.5mm, custom long lengths supported |
| Structure | Torx recess countersunk head, smooth unthreaded shank, twisted cutting flute, continuous coarse wood thread, sharp self-piercing tip |
| Fit For | Solid timber, hardwood planks, composite lumber, timber frame construction, indoor & outdoor wood deck |
| Advantages | Countersunk head fully recesses into timber for smooth flat surface; twisted cutting flute slices wood fiber to avoid board splitting; deep coarse thread provides strong pull-out resistance; yellow zinc plating improves anti-corrosion performance for humid environments; Torx drive prevents screwdriver slippage during high-speed installation |
| Application Range | Timber frame building, wooden deck installation, garden pergola & fence assembly, solid wood furniture construction, composite timber fitting |
| Custom Service | Custom overall length, blue white zinc / Ruspert coating optional, stainless steel material upgrade, adjustable thread pitch |
This countersunk head timber screw is a heavy-duty fastener specially developed for all kinds of timber construction projects.
It is cold forged from Grade 4.8 carbon steel with yellow zinc plating, delivering superior rust resistance compared to conventional blue zinc screws, suitable for outdoor and slightly damp construction scenarios. The Torx countersunk head can be completely embedded under the wood surface after tightening, leaving no protruding parts to maintain a neat finished appearance.
The twisted cutting section on the shank cleanly cuts wood fibers while driving, effectively solving the cracking problem of hardwood and thin composite boards. Long coarse thread tightly locks into timber grain, stable enough to resist loosening caused by wood seasonal expansion and contraction.
Different from wafer head timber screws, the countersunk design is more widely used in invisible decoration and frame connection. All finished screws pass pull-out load, torsion and salt spray tests before delivery to meet timber construction hardware standards. Customers can customize screw length and surface treatment according to different engineering demands.
