Countersunk Head Wood Screws
Product Overview
This screw is a fastener specifically designed for high corrosion resistance and high-strength connections. Its unique double countersunk head, combined with a sharp point and a standard cross recess, enables fast, secure, and aesthetically pleasing fastening in wood, composite panels, and light-gauge steel structures. The key highlight is its mechanical zinc plating, Class 3, which delivers far superior weatherability and safety compared to conventional electroplated zinc products, making it an ideal choice for outdoor and harsh environments.
Product Applications
Outdoor Timber Structures: Thanks to its outstanding anti‑corrosion properties, it is widely used in constructing preservative‑treated timber walkways, garden pavilions, and wooden cabin villas, withstanding long‑term exposure to outdoor weather.
High‑Humidity Interior Fit‑Outs: Ideal for fixing wall panels and assembling furniture in bathrooms, kitchens, basements, and other damp environments, preventing rust stains on surfaces or structural loosening.
Industrial and Agricultural Facilities: Used for securing greenhouse frames, ventilation ducts, metal fencing, and similar installations, adapting to varied and challenging industrial or agricultural conditions.
Heavy‑Duty Furniture and Flooring: Provides strong holding power and long service life in solid‑wood floor laying and assembly of heavy solid‑wood furniture.
Product Features
Mechanical Zinc Plating, Class 3: The coating is dense, uniformly distributed, and of sufficient thickness, offering excellent salt spray resistance. It is especially suitable for outdoor and high‑humidity applications where connection reliability is critical.
No Hydrogen Embrittlement Risk: Manufactured using a physical barrel‑plating process that eliminates hydrogen absorption associated with traditional acid‑pickling electroplating, completely removing the risk of fracture in high‑strength screws – particularly important for high‑strength steel substrates.
Superior Corrosion Protection: The coating is uniformly thick (typically meeting Class 3 or higher standards) and demonstrates outstanding anti‑rust performance in neutral salt spray tests, effectively resisting rain, moisture, and industrial atmospheric corrosion.
Double Countersunk Design: The head geometry is optimised to sink smoothly below the mounting surface, providing a flush, neat finish while delivering a larger contact area during tightening to prevent material crush‑down.
Sharp Point for Self‑Tapping Cutting: The tip features efficient cutting edges with strong self‑drilling and self‑tapping capability, allowing direct driving without pre‑drilling and significantly improving installation efficiency.
Precision Cross Recess: The recess depth and angle are precisely calculated to ensure tight engagement with the screwdriver bit, enabling high torque transmission efficiency and effectively reducing cam‑out and bit jump.
| Material | Carbon steel |
| Surface treatment | Mechanical zinc grade 3 |
| Head type | Double countersunk |
| Slot type | Cross recess |
| Thread type | Deep thread |
| Screw diameter | Approx. 4.8mm |
| Screw length | Optional (65mm to 75mm) |
| Screw type | Wood screw |
| Corrosion resistance | High (suitable for high-humidity environments; e.g., bathrooms, kitchens, basements) |
| Applicable tools | Cross screwdriver or power tools |

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malingfei@linghongscrew.com

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