Countersunk Head Wood Screws
Product Overview
This model is an 8‑10×25‑45 series zinc‑nickel alloy double countersunk Torx recess quick‑thread wood screw, offering a high‑performance fastening solution specifically designed for wood connection applications. The screw is manufactured with a high‑strength steel substrate, combined with B8‑grade zinc‑nickel alloy surface treatment, and features optimised quick‑thread geometry and Torx drive design, delivering efficient installation, anti‑splitting performance, and extended corrosion‑resistant service life. It is widely suitable for various indoor and outdoor timber structures, and particularly meets the requirements for long‑term use in harsh environments such as high humidity and high salt spray.
Product Applications
Installation of indoor and outdoor timber flooring, preservative‑treated wood decks, and terrace boardwalks;
Wood‑to‑wood and steel‑to‑wood connections in solid wood furniture, wooden house frames, timber joists, and other timber structures;
Fastening and splicing of oriented strand board (OSB), multi‑layer composite panels, and similar sheet materials;
Timber engineering projects in humid environments, coastal areas, and other applications with high anti‑corrosion requirements.
Product Features
Quick‑Thread Anti‑Splitting, Efficient Installation: The large‑lead quick‑thread design incorporates cutting grooves, allowing rapid driving into wood without pre‑drilling; the double countersunk head can sink completely into the wood surface, inhibiting fibre splitting while balancing installation efficiency and surface aesthetics.
Torx Drive, No Cam‑Out or Stripping: The internal six‑lobe Torx recess engages tightly with the driver bit, accommodating high tightening torque and supporting batch installation with power tools, significantly reducing bit wear and slipping issues.
Zinc‑Nickel Coating, Excellent Corrosion Resistance: The zinc‑nickel alloy plating offers salt spray resistance up to 500‑1000 hours, with far superior anti‑corrosion performance compared to conventional galvanising. It is compatible with preservative‑treated wood and suits harsh environments, including outdoor high‑humidity and coastal high‑salt‑spray conditions.
Comprehensive Specifications, Strong Adaptability: Available in multiple diameters and lengths, with a partial‑thread design that quickly pulls multi‑layer panels together, meeting fastening requirements for various wood thicknesses and splicing scenarios.
| Material | Carbon steel |
| Surface treatment | Zinc-nickel alloy |
| Head type | Double countersunk |
| Slot type | Torx recess |
| Thread type | Quick-thread forming |
| Screw diameter | Approx. 4.2mm |
| Screw length | Optional (25mm to 45mm) |
| Screw type | Wood screw |
| Corrosion resistance | High (suitable for outdoor preservative-treated wood, patios, and seaside boardwalk environments) |
| Applicable tools | Power tools |

+86 15856352820

malingfei@linghongscrew.com

No. 56, Baishizhan Road, Economic Development Zone, Langxi County, Xuancheng City, Anhui Province, China
