1. Product Name & Standard Official Name: Square Drive Countersunk Head Wood Screw Standard: General wood‑construction screw 2. Structural Features Adopts countersunk flat head design, allows the screw to sit flush below the material surface after tightening. Square recess drive delivers stable torque transmission and avoids bit slipping during installation. Partial‑threaded shank with sharp aggressive wood thread and fine pointed tip. The smooth unthreaded shank under head reduces wood splitting risk while fastening timber components. 3. Material & Strength Grade Main material: Carbon steel. Stainless steel versions can be supplied upon request. Subject to heat‑treatment to improve hardness and thread‑cutting performance. 4. Surface Treatment Common finishes: Dark brown coating; black oxide; organic anti‑corrosion coating for outdoor timber projects. Custom surface finishes are available according to customer requirements. 5. Key Advantages ‑Countersunk head achieves flush finish without protruding above workpiece surface. ‑Square drive effectively prevents screwdriver bit cam‑out for high‑torque driving. ‑Aggressive sharp thread enables fast penetration into wood with low splitting tendency. ‑Half‑thread structure improves clamping force and connection stability for wooden assemblies. ‑Special dark‑toned coating matches dark‑colored timber for better visual appearance. 6. Application Scenarios Extensively used for decking boards, outdoor wooden terraces, timber framing, wooden furniture, garden wood structures, hardwood installation and exterior wood construction projects.