Designed for superior performance and durability, these screws are perfect for securing dense materials such as MDF, particleboard, and other composite woods. The Dense Board Screw Black Phos features a black phosphate coating, providing excellent corrosion resistance and a sleek, professional appearance. This coating not only enhances the screw's longevity but also ensures a smooth, easy insertion without damaging the material. Engineered with a sharp point and deep threads, these screws offer exceptional holding power and stability, preventing board separation and ensuring a tight, secure fit. The bugle head design allows for a flush finish, making these screws perfect for applications where a smooth surface is required. Features & Benefits • Phillips No.2 recess for a positive drive • Reduced countersunk head for improved countersinking into the dense board • High-Low thread for increased pull out value into both timber and thin sheet metal • Coarse thread for extreme hold • 25° super sharp point for ease of penetration Specifications • Diameter: 3.9mm • Length: 55mm • Thread Length: 50mm • Finish: Black Phosphate • Pack Quantity: 1000